As we all know android head unit is slow to boot when it is shutdown (cold boot). But is reasonably fast when it is just waking up from sleep (ignition turned off less than a set time and turned back on).
So, I was wondering if anyone tried keeping head unit from going complete shutdown and keep in sleep mode while ignition is off.
How much current draw did it have in sleep mode? Any negative effect?
It would be the best if I head measured current draw before hooking up the radio, but I did not think about that at the time. I don't want to cut the wire again if I don't have to (meaning someone else has measured already. )
I didn't measure it myself but yesterday I read a post regarding the power consumption while on, sleeping and off. It was 1.2A (~14-15W) while sleeping which is ****ing ridiculous imho but could be the explanation why there isn't an option to keep the device sleeping longer than 2 hours. Given that consumption while sleeping, your battery would be probably dead in less than 3 days of standby time.
Streetking21 said:
I didn't measure it myself but yesterday I read a post regarding the power consumption while on, sleeping and off. It was 1.2A (~14-15W) while sleeping which is ****ing ridiculous imho but could be the explanation why there isn't an option to keep the device sleeping longer than 2 hours. Given that consumption while sleeping, your battery would be probably dead in less than 3 days of standby time.
Click to expand...
Click to collapse
Wow. That is pretty high. Hardly in a sleep state.
Streetking21 said:
I didn't measure it myself but yesterday I read a post regarding the power consumption while on, sleeping and off. It was 1.2A (~14-15W) while sleeping which is ****ing ridiculous imho but could be the explanation why there isn't an option to keep the device sleeping longer than 2 hours. Given that consumption while sleeping, your battery would be probably dead in less than 3 days of standby time.
Click to expand...
Click to collapse
Surely not?
morgish said:
Surely not?
Click to expand...
Click to collapse
What?
Streetking21 said:
I didn't measure it myself but yesterday I read a post regarding the power consumption while on, sleeping and off. It was 1.2A (~14-15W) while sleeping which is ****ing ridiculous imho but could be the explanation why there isn't an option to keep the device sleeping longer than 2 hours. Given that consumption while sleeping, your battery would be probably dead in less than 3 days of standby time.
Click to expand...
Click to collapse
Attribute that to "made in china". With just a little bit more thought, they could have designed the MCU board to shut down completely while putting the CPU into deep sleep, and end up with a sleep/standby mode that consumes negligible power.
I.e., it shouldn't use any more power than a half-decent TABLET does in sleep mode with the wifi turned off. My Nexus 9 will standby for a couple of MONTHS like that, and its battery is a very small fraction of a car battery.
Streetking21 said:
What?
Click to expand...
Click to collapse
Sorry, that was pretty vague of me. 1.2amp, 15watt is crazy for sleep mode!
I did measure the power consumption in sleep mode before I installed my Joying in my car.
Result: 350-450 mA
realzoulou said:
I did measure the power consumption in sleep mode before I installed my Joying in my car.
Result: 350-450 mA
Click to expand...
Click to collapse
That sounds more reasonable, although that still a bit high for leaving car parked for few days.
Extending shutoff time to 24 hours maybe ok. Don't know how yet, but it should be possible.
realzoulou said:
I did measure the power consumption in sleep mode before I installed my Joying in my car.
Result: 350-450 mA
Click to expand...
Click to collapse
Thanks for the info.
---
I wouldn't feel comfortable with a sleep time of 24h+. Lets say its 400mA and you use your car on a daily basis. Thats 24h*400mA = 9.6Ah. I am not an expert when it comes to car batteries but I read somewhere that if the battery capacity drops lower than 50 or 60% the starter has a hard time, especially with the colder temperatures ahead (at least here). And you have to consider that the older the battery the less capacity. I wouldn't test it out myself but I would be very interested in someone doing it nonetheless
realzoulou said:
I did measure the power consumption in sleep mode before I installed my Joying in my car.
Result: 350-450 mA
Click to expand...
Click to collapse
500mA is a little high to left in that state for a long period of time. 500mA is the current that drain one car lamp of 5W, like the ones on the rear, the tiny ones on the front, or the ones used in the passenger compartment. With a good battery there should be no problem for letting it in that state for a day or so, but for an old battery this could dry your battery in a few hours.
However, i agree with the fact that the time for going to shutdown should be user selectable.
i was thinking of the same thing, now i am completely ignorant of the electornics side of it, but isnt this something the devs here can take on to fix from the software side of things, i.e keeping only the CPU in deepsleep and shutting everything else down?
It's necessary to keep in mind that these HUs are not like tablets. These HUs has more electronic inside of them: MCU, sound ampliffier and, surely, some more electronics. All of them drain current, and not all of them are capable of getting in a low power mode like CPUs do.
---------- Post added at 12:49 PM ---------- Previous post was at 11:50 AM ----------
Hi! I think I've found the solution!
In my HU, Erisin 3015V, I go to settings and just below "GPS" option, there is another option that says "Extension configuration" (Or something like this, just because my unit is in what chinese people think is spanish...) and into this option there are three ones, the first of them says something like "Delay when acc is shutdown", and this option has several values. The first time was selected 30seconds, and the HU Always made a cold boot. Then I adjusted it to the max, 2 hours, and now the unit has warm booted after more than 1 hour of beeing slept.
Try you and update, please... I think that 2 hours is enough for most situations.
in which way is this a solution?
2 hours is the current maximum for all headunits I know and it is not a secret or hidden option, but this thread is about keeping the unit in sleep mode for a longer period of time than the 2 hours. (no offense)
Oh! Ok. Sorry. I was mistaken
prolly not much of a problem for me in. 08 duramax with dual deep cycle batteries.
on another thought, you people with standard cars with standard starting batteries... you COULD install a second battery. a deep cycle battery. run HU off it. isolate it from charging system while vehicle is off. automatically reconnect to charging system with a relay of some sort when vehicle is on. this way you NEVER stand the chance to drain your starting battery. and as its a deep cycle, draining it down empty doesnt damage it unlike starting batteries. i wouldnt even worry about it anyway because it would prolly take like 12 months to drain a decent deep cycle down. lol
hurtgen said:
i wouldnt even worry about it anyway because it would prolly take like 12 months to drain a decent deep cycle down. lol
Click to expand...
Click to collapse
whats the math behind this calculation?
12 months = 365 days = 8,760 hours
8,760h x 0.4A (consumption of the head unit while in sleep mode) = 3,504 Ah
Show me that car battery and I will give you a cookie
Thought of the second battery myself. In general, I think thats a viable option but there are some downsides as well. The generator has to be very powerful to load two batteries at once or you even have to add additional relays to prioritize the main/starter battery. Of course that problem depends on wether your primary trip range is short or long. This should work if you are driving on a daily basis or at least every second day for 30-40 minutes I guess.
Lets say you install a deep cycle battery with 80Ah and it is fully charged, the theoretical standby time is a bit more than a week (ofc that could be enough for some people):
80Ah / 0.4A = 200h = 8.3 days (just the theory)
As I dont know much about deep cycle batteries I will cite from wikipedia:
A deep-cycle battery is designed to discharge between 45% and 75% of its capacity, depending on the manufacturer and the construction of the battery. Although these batteries can be cycled down to 20% charge, the best lifespan vs cost method is to keep the average cycle at about 45% discharge
Click to expand...
Click to collapse
Long story short, you wont get 8.3 days from a 80Ah deep cycle battery. If you are fine with the reduced life span, its around 160 hours (6.6 days) and if you follow the manufacturers recommendation you will probably get around 4-5 days.
I am not trying to work against you here, but I dont know if thats really worth the trouble (costs & installation). Thank you for your input anyway.
Hmm. My truck runs dual AC Delco 48PG's. It appears each are 70 amp hour.
Here's a couple other options that come to mind.
1. Most viable and affordable in my opinion. Wire up an easy attach Battery Tender. I have this set up on my motorcycle. When I roll in to the garage after a ride, I mismount, attach battery tender, and my small motorcycle battery receives a small trickle charge until next time I ride. Also, do Not use the cheap battery chargers. Spend the extra 10 bucks and get a smart charger. This thing works awesome! I pull all my batteries from vehicles not used during winter and bring them in to the house and have BT on them. If your unfamiliar with these, definitely check it out.
2. Perhaps some sort of small and efficient solar panel that can not only keep up with HU discharge, but enough to also overcome parasitic waste from all other systems as well? Not sure if this is viable. I don't know anything about solar panels. Just throwing it out there
The only issue I have with the battery tender option is... what happens when the user forgets to unplug it before driving off? Other than that it's not a bad idea. There definitely needs to be some thought put into low power modes. I used to hotwire my HU's so that I didn't have to listen to the key-minder on my older vehicles. Difference is that those non-advanced HU's had a real "off" mode even with the ACC wire hot all the time.
The solar panel option would work well for those that park outside and have decent sunlight during the day.
Hi Sorry for my english.
I have a problem.
My head unit often doesn't shutdown after suspend mode.
Maybe 50â„… times works correctly.
Another 50â„… i switch off engine, radio goes in suspend mode ( Black screen and not respond pressing button) but if i switch on engine after the suspend time ( i set 30second but it is so also 20 minutes) the head unit is already on homescreen without reload the s.o.
Inviato dal mio MI 5s Plus utilizzando Tapatalk
Related
hi there!
as mentionend by users in other threads, it seems that a high number of raphs have a draining battery issue - compareable to the bug in our kaisers about a year ago: batterystatus measures around 70/80 mA in sleepmode with all programs and tf3d closed - on a kaiser with custom rom was around 4mA (!!).
So please, dear chefs: Try to figure out how we can fix this one
Check out some kind of solution / a way to improve your battery uptime: http://forum.xda-developers.com/showpost.php?p=2770702&postcount=25
Update: Battery was sucked empty from 90% within 3-4 hours in the night (!!). No running programs. In the chart you can see the difference between loading with the 220V plug and the USB-cable (last part of the chart). Sometimes it looks as the device sucks more power than the usb loader can deliver -> battery will get empty even when plugged into the computer the whole day.
Looks as we really need a solution thus waiting for htc or cellproviders is useless :-(
licht77 said:
Update: Battery was sucked empty from 90% within 3-4 hours in the night (!!). No running programs. In the chart you can see the difference between loading with the 220V plug and the USB-cable (last part of the chart). Sometimes it looks as the device sucks more power than the usb loader can deliver -> battery will get empty even when plugged into the computer the whole day.
Looks as we really need a solution thus waiting for htc or cellproviders is useless :-(
Click to expand...
Click to collapse
Can you check this? Start->Settings->System->Power. Make sure that the "When device is turned on, do not charge the battery when connected to the PC" is unchecked.
programatix said:
Can you check this? Start->Settings->System->Power. Make sure that the "When device is turned on, do not charge the battery when connected to the PC" is unchecked.
Click to expand...
Click to collapse
Of course it is unchecked - but thanks for the hint!
I still need to get over the shock that it took just 3-4h to ground the battery in standby without running programs oO
for me it helped a lot to improve battery life to set the setting 18.4 (energy saving) in diamond tweak...
pensador said:
for me it helped a lot to improve battery life to set the setting 18.4 (energy saving) in diamond tweak...
Click to expand...
Click to collapse
I need to compare the tweaks but i enabled energysaving options with Advanced Config... - but I will give diamond tweak a try and even do a hardreset in order exclude 3rd party software for the power consumption...
ill report soon!
im having battery issues, too.
sometimes the phone gets unresponsive, really hot and battery drops 30-40% in ~1h minutes - without being used.
i love my touch pro, but ive got so many problems (crashes, hang ups, battery, broken screen thing, grey display with stripes, the list goes on and on...) that im considering to return it
So... small update of my findings:
My Raph(s):
R 1.02.25.19
G 52.23.25.1.7U
D 1.69.00.00
The power consumption usually never falls below 75mA. It goes up to usually 240mA, 700mA yes sometimes 1100mA. (Again: in standby!)
Comparison: on the kaiser it was around 4-12mA with Teijaks V5.
The following changes WONT affect this problem:
o disabling TF3D
o switching to GSM/GPRS only
o switching off persistent internet connection (e.g. exchange server) (!!!)
o kicking ALL not absolutely necessary backgroud processes step by step and measure between
Naively i thought that someone may be interested in that behaviour and called my provider t-mobile... ok, bad idea as they seem to have none knowledge about that devices at all.
But at least I got a number of their hardware-supporter / servicemen "Kapsch" who couldnt help me either but where kindly enough to pass me a number of HTC here in Europe.
The nice lady with basic knowledge about the devices as well as the language we were talking in came to the conclusion that the only solution would be to send the devices in via my provider.
Well, so they believe that exactly theese 3 raphaels here are the only ones to suffer from that power drain (hardresettet, blank installation, bla bla like above)... and sending them in (what means: dont see them again for a month or so and get them back in the same condition) would be THE solution.
Somehow i am pissed that i already sold the kaisers and wonder how it will be next week on a businesstravel with an unpowered TomTom outside the car and a phone which drains in a few hours in standby
(Sorry for whining around...)
Completely agree with some of your figures, however the highest i have ever seen is around 550mA. Usually after no data transfer i get it to drop to between 89 ~ 110mA. How are you measuring standby current? When in standby, how can the software measure the current? I only ask as like you, the lowest i have seen for current is 82mA, however this figure would give a max standbytime of around 16 hours. I have found that the TP in standby performs the same if not better then my old kaiser which, like you measured around 4mA in standby. From what i have seen, i can not measure a true standby current like i could on the kaiser.
I measured with CommMgrPro and batterystatus...
Measuring a "real" standby without changing the battery with an Ampere/Voltmeter is not easily possible i think... so i use CommMgrPro and accept its own usage as somekind of "Baseline".
Or - if you dont need a chart / history, i use the much smaller Batterystatus, disable TF3d to see the Homeplug and close all applications. With all apps closed i turn of the device, wait a minute or to be sure that it has gone sleeping, and wake it up. A few seconds after turning on the mW/mA measures will jump to the "standby" values due to its delay. Not 100% accurate but okay for comparison reasons...
Edit: Theese are my processes, the bold ones have been killed for testing purposes:
NK.EXE;0;0;\Windows\nk.exe;;2;FEFF002
filesys.exe;9760768;6286864;\Windows\filesys.exe;;14;FEEDCE6
device.exe;6602752;5714424;\Windows\device.exe;;218;FEB8F4A
cprog.exe;10567680;10227808;\Windows\cprog.exe;-n;12;2D93537A
SAPSettings.exe;114688;2944;\Windows\SAPSettings.exe;99;5;E9C7742
gwes.exe;4698112;4214840;\Windows\gwes.exe;30;35;E9B4566
shell32.exe;1724416;886584;\Windows\shell32.exe;50;21;CE70CBAA
services.exe;3035136;2127440;\Windows\services.exe;60;74;AEDD3EF2
connmgr.exe;409600;99152;\Windows\connmgr.exe;70;17;D8D06E6
Biotouch.exe;1024000;636792;\Windows\Biotouch.exe;;9;EF86C7DE
SDDaemon.exe;176128;28544;\Windows\SDDaemon.exe;;2;6DA68DBE
tmail.exe;352256;46256;\Windows\tmail.exe;-NoUI;6;ED2CCD36
OperaPreL.exe;24576;32;\Windows\OperaPreL.exe;;2;EC986A3E
Opera9.exe;159744;4256;\Windows\Opera9.exe;;1;C4FA06E
JBlendDaemon.exe;188416;65744;\Windows\JBlendDaemon.exe;;3;C595512
SIPGT_app.exe;1863680;1688032;\Windows\SIPGT_app.exe;;2;AC57D24E
My5MsgCenter.exe;180224;22016;\Windows\My5MsgCenter.exe;;5;C2CD412
myFavesService.exe;299008;132608;\Windows\myFavesService.exe;;2;AD8D0806
licht77 said:
I measured with CommMgrPro and batterystatus...
Measuring a "real" standby without changing the battery with an Ampere/Voltmeter is not easily possible i think... so i use CommMgrPro and accept its own usage as somekind of "Baseline".
Or - if you dont need a chart / history, i use the much smaller Batterystatus, disable TF3d to see the Homeplug and close all applications. With all apps closed i turn of the device, wait a minute or to be sure that it has gone sleeping, and wake it up. A few seconds after turning on the mW/mA measures will jump to the "standby" values due to its delay. Not 100% accurate but okay for comparison reasons...
Click to expand...
Click to collapse
OK, this i could do on the kaiser, but not on the touch pro. Each time i turn the phone on, i see at least 82mA, which would only give a stnadby of 16 hours - but i can achieve 3 days, so clearly this is not the standby current.
3 days.. i can only dream of that That would mean that you got around 19mA drain in standby... how do u measure?
licht77 said:
3 days.. i can only dream of that That would mean that you got around 19mA drain in standby... how do u measure?
Click to expand...
Click to collapse
Thats what i'm trying to say - i cant measure anything below 80mA when i turn the TP on, however it is obviously NOT the standby current as i can obtain 50mA with a dim backlight, plus get 3 days standby. When i state 3 days, thats with no usage!
I'm just trying to point out that what you think is the standby current, probably isn't and we all know that there are issues with the battery management on this phone.
Another example, i have had my phone of charge since 7am, made a couple of short calls, 5 mins of wap browsing, and its currently reporting 95%. If my standby current was 80mA, it would be down to 50% by now. However, assuming i continue to use the phone in this way, in theory i should get 160 hours, which indicates an average drain of 8mA.
I agree - of course you are right and measuring this way can - if anyhow - assist in relatively comparing two devices/ configs but not deliver absolut values of course.
With batterystatus it worked pretty well on the kaiser - and even on the raph i could see 3 or 4 times my beloved 4mA... but in 99% its around 80aH ind standby and around 300-400 in usage which seems plausible regarding my usage.
Nevertheless i had several times a "hardcore" drain where i must had (mathematically) around 400 during standby and maybe even more during worktime when plugged in via USB: It DISCHARGED what means that it used more power than USB could deliver
(usb charging settings correct)
If I dont get my callback from my provider today, then i will try an inofficial RadioRom this weekend...
In standby mode, all application should have been paused by the deviced, right? Then how can any application measure the power usage in standby mode?
some apps keep going. thats how you get messages
i can get 2days out of my phone with heavy usage
Brendo said:
some apps keep going. thats how you get messages
i can get 2days out of my phone with heavy usage
Click to expand...
Click to collapse
That is because the OS send out events when something happens, thus waking up the device and letting the apps run.
For SMS, sim card receive message, sim card inform OS, OS wakes device up, OS send out events, app capture the events.
For alarms, OS wakes device up when the schedule reached, then send out events or start apps depending on the alarm.
So, device must wakes up before apps can do anything.
Some apps intercept the standby button (power button) and instead of letting the device goes to standby when pressed, just turns off the display. For TP, HTC has modified something (or loaded some apps) to make sure that when you are playing the music or listening to the radio, the power button just turn off the display instead of going to standby mode. If the device goes to standby mode, the device could never play any music.
So, if the battery benchmarking app you are using is able to measure the power consumption when the device goes to standby, I doubt it. It actually just turn off the display.
I seem to have fixed or at least drastically improved my battery. I was suffering major drainage with moderate to heavy use, after about 5 hours the power would go down from 100% to 10%. I have WiFi on permanently and do a lot of emailing and texting.
I drained the battery to 0% and with the phone off (not in standby) I charged it using the AC adaptor. With it fully charged and the button light on (glows when charging, solid on when charged) I turned the phone on and first time it said 88% charged?!?! But it lasted the whole day and even had a good 30+% left at the end.
Did it again, ran loads of apps and switched everything on until 0% battery. Charged over night with the phone off. Next day it said it had 95% charge when I switched it on and again it lasted all day with quite heavy usage.
Discharged it again that night and plugged it in, today it says 100% and I'm pretty sure it will last even longer.
I've also found that after doing this, if I don't use the phone and the screen is off, I can leave it for 4 hours and the battery percentage doesn't even go down 1%.... which is a bit unbelievable but happens.
PLeased to say, now this last gripe seems to be fixed..... this is by far the best smartphone I've owned or used and on the market. Great step up from the TYTN II and iPhone (nice toy but useless for email and destructive with exchange servers).
Gav_ said:
I drained the battery to 0% and with the phone off (not in standby) I charged it using the AC adaptor. With it fully charged and the button light on (glows when charging, solid on when charged) I turned the phone on and first time it said 88% charged?!?! But it lasted the whole day and even had a good 30+% left at the end.
Did it again, ran loads of apps and switched everything on until 0% battery. Charged over night with the phone off. Next day it said it had 95% charge when I switched it on and again it lasted all day with quite heavy usage.
Discharged it again that night and plugged it in, today it says 100% and I'm pretty sure it will last even longer.
Click to expand...
Click to collapse
True. Draining the battery completely really helps. I've done it about 3 times and now my device can reach 2 days of heavy use with 1 charge. When I bought it drained very fast and charge indications were way of. (1 hour charges would just increase charge level with 5-10%).
What also adds battery life ia disabling activesync in the notification queue. Use memmaid or a similar program. Go to the notification queue and disable the entry for repplog.exe with the comment "system time changed". Activesync will function normally when connected to a PC. Not sure about OTA exchange syncs though...
Hope this helped
Scott
Hi,
I've found that the Raphael battery stops charging when it gets warmer than 48 degrees Celsius. I discovered this because I am using WMWifiRouter all day at the office, and noticed that although I have the Raph connected to a 2000mA wall charger, the battery drained and device got down to 10%.
The trick is that I have to put the device in "standby" mode py pressing the power button. The screen goes off, but the device is still running. This resulted in a lower device / battery temperature, and the battery remained at 100% after 8 hours of usage with WMWifiRouter and connected to the wall charger.
I can contrast this to with my Kaiser, which didn't stop chraging the battery until about 65 degrees Celsius!!
Maybe that helps too.
-Z
As stated above, I'm curious what the answers will be.
We obviously can't define "heavy use", but I think everybody gets the point
I'd like to ask the 7-8 guys how they do it?
Soniboy84 said:
I'd like to ask the 7-8 guys how they do it?
Click to expand...
Click to collapse
I use auto brightness.
Also, when I got the TF I did the whole break-in thing. It was in the manual.
Now, if you want to get better life you can reset your lithium ion battery. Use it till its below 5%, maybe even go to 0%, then charge it to 100%.
Do this atleast twice back to back. You should see your life grow.
Also, never over charge it, and never leave it charging at night. Even though some people will tell you it 'stops' charging once it hits 100%, it actually goes to trickle, and trickle or not, its still over charging it.
denverseven said:
I use auto brightness.
Also, when I got the TF I did the whole break-in thing. It was in the manual.
Now, if you want to get better life you can reset your lithium ion battery. Use it till its below 5%, maybe even go to 0%, then charge it to 100%.
Do this atleast twice back to back. You should see your life grow.
Also, never over charge it, and never leave it charging at night. Even though some people will tell you it 'stops' charging once it hits 100%, it actually goes to trickle, and trickle or not, its still over charging it.
Click to expand...
Click to collapse
Thanks for the answer,
I unfortunately don't have the manual with me, but true, I just got the tab yesterday. So do you think in time it will improve? What is that break thing you mentioned?
Soniboy84 said:
Thanks for the answer,
I unfortunately don't have the manual with me, but true, I just got the tab yesterday. So do you think in time it will improve? What is that break thing you mentioned?
Click to expand...
Click to collapse
Mine has also got better only thing that kills the battery is playing Galaxy on fire 2 other than that i watched two 2 hour long movies and still had 40 % left
denverseven said:
I use auto brightness.
Also, when I got the TF I did the whole break-in thing. It was in the manual.
Now, if you want to get better life you can reset your lithium ion battery. Use it till its below 5%, maybe even go to 0%, then charge it to 100%.
Do this atleast twice back to back. You should see your life grow.
Also, never over charge it, and never leave it charging at night. Even though some people will tell you it 'stops' charging once it hits 100%, it actually goes to trickle, and trickle or not, its still over charging it.
Click to expand...
Click to collapse
Manual says "to prolong battery life fully charge the battery for up to 8 hours when using the Eee pad for the first time and whenever the battery is fully depleted" Often wonder where you get these post that say don't leave it charging for more than 2 hours.
Auto brightness is really dim on my old eyes
BTW I have a dock and get a lot more than 7 or 8 with it ...very close to the 15 or so they say ..it is according to what your doing...if your playing games, watching flash or movies your mileage will vary
Same here, I usually just watch movies, (occasionally getting distracted by some tower defense game), but apparently my overall usage is due to the screen brightness. I had it on autoadjust for a while in the beginning (lasted like 8 hours) but then I don't like (is there an adjust option for autoadjust? it'd be a lot better if it made it just 10% brighter than it usually sets it..) the autoadjust, so now I usually have it on like 60-100% brightness and I still get 6-7 hours on it. Then i just dock it for another couple of hours.
Hm... too bad I like bright screens
So maybe that's the reason mine only lasts 3-4 hours :S
We'll see later on, maybe it will improve!
Soniboy84 said:
Hm... too bad I like bright screens
So maybe that's the reason mine only lasts 3-4 hours :S
We'll see later on, maybe it will improve!
Click to expand...
Click to collapse
Wow. I have mine cranked and it lasts well over that. Closer to 6 with consistent video watching.
i mostly use mine to browse online and music etc,i get around 9 hours with auto brightness
*added*
i used systempanel to monitor when i sleep to check usage,its between 1~3 percent for the cpu, battery life stays flat lined. cpu activity averages 30% while device is at 100%. i use advance task killer and juice defender and disable connections and sync etc.
well one thing for sure, my mifi died before my transformer died, so i roughly say 6 hours ++. when in music, it saves a lot of battery.
DilloDroid said:
Often wonder where you get these post that say don't leave it charging for more than 2 hours.
Click to expand...
Click to collapse
2 hours is silly. Mine takes at least 2.5 to charge to 100%. I'm not sure where you've read that, but don't believe it! lol.
Li-ion batteries are great because they are extremely flexible and charging them like 5 times a day isn't a bad thing like it would be with an older technology.
But they are still susceptible to overcharge issues because they generate heat when charging, and that heat changes the composition of the battery, which makes it last less and less over time. That's why li-ions hold roughly 50% of their charge after 1.5 years of use.
And that's why one shouldn't overcharge it.
about 6~7 on stock..just recently tried prime 1.7 so will check for any changes
Does Netflix count as heavy usage? if so then I get about 8 hours
I use mine to browse and to remote desktop to my PC. Sometimes i use gchat and other times play a game or two. I get around 7-8 hours from the eee pad only. With the docking i get much more.
I use auto brightness, and wireless off when screen is off. This way i can leave my tf up and running all night and is ready to be used at any time. The main power consumption are the screen and the wireless on my usage profile. Both together consume more that 70% of my battery.
Is it possible to switch off the wifi automatically when the screen goes off?
Yes, of course. Go to wifi-properties, then choose extended (on German: "Erweitert") at the top right and there you can choose your setting.
(I've got a german TF - there it is "WLAN-Einstellungen"->"Erweitert")
With auto-brightness and wlan-off on screen-off 9 hours is no problem.
Great Tablet
I run Clemsons V4 Final, no dock and have the screen timeout set at 30 minutes. I didnt pay attention to the recommended battery stuff in the manual. And usually leave mine on the charger all night to be sure I start the day at 100%. I use my TF all day for work, taking notes, surfing and so on. I generally get home with 40%, if I dont play Angry Birds. I have played just music for 8.5 hours continuous with a 15% drop in battery.
Not iPad performance but still a keeper.
I put 6 hours of HEAVY use, but I usually get a full day's usage out of it since I keep my pad tethered to my charger at my desk all day at work.
tried the break-in charging thing (drain to 0% then charge it for 8-9 hours). My battery life changed drastically. Did it only once but ill charge it like that again when it depletes to 0%. It running now on its 3rd day with minimal to moderate use (28% as I am writing this). Will post battery drain per hour once done with the 2nd charging
No Dock, 2 Mobile Data Application frozen via Titanium back up
Anyone know where to get an extended battery? Thanks.
I can't even find a place to buy a regular battery for the phone. I'm not sure if I would need one, but it would be nice to have. I'm in the habit of charging it the last hour I am at work so no matter what, I'll never run out of battery even if I go somewhere straight from work, but a spare battery is always a good thing to have.
I have a wild guess as to why not.
I noticed this phone battery has the "near field communication" labeling on the BATTERY. The other phone that I'm aware of having NFC, (the galaxy s2) does NOT have this wording on the battery.
Why did I notice this? I randomly read that there is an SD card manufacturer that is putting NFC chip's into their microSD cards, and even some ipod cases are getting NFC chips built into them as well.
I don't know too much about NFC, but with the labeling being on our battery, and not the S2, I kinda think our NFC chip is actually in the battery, and not the phone itself. If an NFC chip can be put into an SD card or case on a phone that never had NFC to begin with, I don't see why it couldn't be put into a battery, especially since one of the terminals might not even be for power, but just for an NFC connection.
That's my theory, I could be wrong!
you're probably right. This is how it is with the Galaxy Nexus, also built by Samsung. I hadn't noticed the label, but I also wasn't looking for it.
I'd be curious to find out what an "extended battery" for this phone would look like. I'd be all for it so long as it kept NFC and didn't bulge out of the back
I'd be interested to find one. Being on a stock rom and standard battery, my battery drops about 5% in five mins just checking Facebook. GPS drains it another percent per min it is in use. Half way thru the day my battery is dead. It really sucks having to carry around a charger. I'm also using juice defender and other tweaks I know to save battery
I'd bet you a waffle cone your screen brightness is set too high.
Forget most of those "battery defender" apps, especially if they are those stupid task killing applications.....a program being in active memory is not necessarily actually doing anything, which means it is not using your battery, and if it gets killed, if the OS needs it open for any reason, it having to be re-opened will just use cpu cycles anyway
I'd agree with most people that using the automatic brightness option is very annoying, it's really sensitive and it also tends to make the screen not be bright enough. Having said that, using any of the many available brightness widgets can be a very good thing.
The stock one is not so bad, personally I've been enjoying powerful control, http://goo.gl/2vZXl but I've had great battery life and easy readability if I use the brightness setting where it looks like a half moon.
If you're outdoors in the bright sun, you'll need the screen to be as bright as possible if you want to read it, but otherwise it's fine. The screen brightness is always the single biggest battery usage factor.
Personally I've always disabled the haptic feedback as I think it's annoying and I'm sure that using vibrating alerts is also a huge battery drain.
Cirkustanz said:
I'd bet you a waffle cone your screen brightness is set too high.
Forget most of those "battery defender" apps, especially if they are those stupid task killing applications.....a program being in active memory is not necessarily actually doing anything, which means it is not using your battery, and if it gets killed, if the OS needs it open for any reason, it having to be re-opened will just use cpu cycles anyway
I'd agree with most people that using the automatic brightness option is very annoying, it's really sensitive and it also tends to make the screen not be bright enough. Having said that, using any of the many available brightness widgets can be a very good thing.
The stock one is not so bad, personally I've been enjoying powerful control, http://goo.gl/2vZXl but I've had great battery life and easy readability if I use the brightness setting where it looks like a half moon.
If you're outdoors in the bright sun, you'll need the screen to be as bright as possible if you want to read it, but otherwise it's fine. The screen brightness is always the single biggest battery usage factor.
Personally I've always disabled the haptic feedback as I think it's annoying and I'm sure that using vibrating alerts is also a huge battery drain.
Click to expand...
Click to collapse
My screen brightness is at zero without automatic brightness on, and im not using haptic feedback. The phone battery is fine if its just sitting over night, but as soon as I turn on GPS to use maps for 5 mins or to check facebook the battery just drops a % every min. So i guess the phone is fine if Im not using it, but then whats the point?
You're exaggerating.
I've never had a phone battery drop 1% per minute.
Look man, I just spent 5 minutes playing music at max volume, while getting directions to 8 different places in google maps, sent two emails, downloaded a new app from the market, and received one text message.
Battery level after all this? Still at 100%. Does that mean I can do this an unlimited number of times? No, it does not.
Frankly, I don't believe you. I've used this phone, and my previous phone for playing movies at full screen brightness with the audio being played through bluetooth to my stereo headsets. Does it effect the battery status? You bet it does.
Two weeks ago when I last played a snes game on my phone I did so at full screen brightness over bluetooth to a ps3 controller. When I wasn't playing the game I was sending or receiving text messages and had vibrate on. I played super metroid from the very beginning to almost through the end of the game. When I play snes games on my phone I tend to use quick save and quick load and frame skipping very commonly, effectively letting me do things "perfectly" but this is a lot of saving and loading and running the game even faster than how it normally is. I started at 2, and the next thing I knew it was 6:00 and I was supposed to meet a friend for dinner at 6:30.
But for crying out loud you are saying you can drain your battery from 100% to zero in less than 2 hours.
I'm calling shenanigans. I don't think you could even do that intentionally, unless you sat there and forced the phone to vibrate the entire time.
Phone batteries don't last for days like they used to. Batteries have not changed too much in the last few years, but the things phones do, and the screens they do them on certainly has. Stop expecting your phone to last over the entire weekend even when you actually use it.
itsLYNDZ said:
I'd be interested to find one. Being on a stock rom and standard battery, my battery drops about 5% in five mins just checking Facebook. GPS drains it another percent per min it is in use. Half way thru the day my battery is dead. It really sucks having to carry around a charger. I'm also using juice defender and other tweaks I know to save battery
Click to expand...
Click to collapse
Something to keep in mind:
When this phone hits 100%, it STOPS CHARGING. Even plugged in, it will no longer be drawing power into your battery, yet it'll still be running on battery.
If you plug it in when you go to sleep, it finishes charging within 2 hours, then it goes 6 hours idling on battery power but it still says 100% until you disconnect it. Then, while you're using the phone it'll adjust as you use it until it gets to the right level. This is likely what you're seeing.
If I use my phone from the moment it finishes upping to 100%, I get great battery life. I get great battery life in general and have been happy with the phone.
Of course, this might be a totally different issue where you just got a bum battery. But it's something worth considering.
dr4stic said:
Something to keep in mind:
When this phone hits 100%, it STOPS CHARGING. Even plugged in, it will no longer be drawing power into your battery, yet it'll still be running on battery.
Click to expand...
Click to collapse
I don't believe this is true. I hate to constantly be a naysayer in this thread, but this didn't seem logical to me so when my battery went to full, (when the battery is full, unplug charger text showed in the notification bar) I kept it plugged in and set it to play a couple tv episodes on full brightness while I did laundry and made dinner.
Two hours later, I first looked at the battery status while the phone was still plugged in. As expected, it was at 100%.
I unplugged the charger, waited a couple minutes, and checked again.
Still at 100%, which completely makes sense because I've never had a phone that behaved as you've described.
I also would have noticed the battery dying very early, *every single day* because my habit for the last week or so has been to plug the phone in when I go to sleep. I have an app called syncme that pulls files off my computer such as music and video while I'm sleeping, and on average it transfers about 6 gigs of data this way, every single day.
I don't know if you've ever transferred 6 gigs of data on a phone via wifi, but yes, it's not exactly battery power friendly.
My phone's always been 100% battery when I leave for work, just like my last phone was where I also plugged it in at night.
Just saying!
So you guys know.. I have galaxy nexus and the blaze and the batteries are the same so you can order a battery fro the nexus and it will work with the blaze
Sent from my Galaxy Nexus using XDA
radiohead7778580 said:
So you guys know.. I have galaxy nexus and the blaze and the batteries are the same so you can order a battery fro the nexus and it will work with the blaze
Sent from my Galaxy Nexus using XDA
Click to expand...
Click to collapse
Just did an ebay search for Galaxy nexus.. You might need to clarify which model number as there are various Galaxy Nexus batteries listed per Nexus model on ebay...
Galaxy Nexus GSM I9250
Cirkustanz said:
I don't believe this is true. I hate to constantly be a naysayer in this thread, but this didn't seem logical to me so when my battery went to full, (when the battery is full, unplug charger text showed in the notification bar) I kept it plugged in and set it to play a couple tv episodes on full brightness while I did laundry and made dinner.
Click to expand...
Click to collapse
Actually he is pretty close to the way it operates. The way your phone gauges battery life is similar to your car with gas. When the meter reads 100%, it is really more like 98%. When the battery reaches true 100%, the phone will stop charging the battery (but will run off of USB power, not the battery). They do this to account for small variations in the many variables that affect a battery's performance (like temperature). Likewise, your phone will read 0% before the battery is truly completely drained (this is also to protect the battery - they don't like being charged to 100%, nor drained to 0%).
This could also greatly affect your previous test on battery performance. To get a more accurate result, let the phone drain to about 60%, then test the time to drop a percentage point.
What you are talking about is a suggestion that the battery meter doesn't necessarily update it's strength meter all of the time, and you even say that the phone runs off the plugged in power at this point.....
mdneilson said:
Actually he is pretty close to the way it operates. The way your phone gauges battery life is similar to your car with gas. When the meter reads 100%, it is really more like 98%. When the battery reaches true 100%, the phone will stop charging the battery (but will run off of USB power, not the battery). They do this to account for small variations in the many variables that affect a battery's performance (like temperature). Likewise, your phone will read 0% before the battery is truly completely drained (this is also to protect the battery - they don't like being charged to 100%, nor drained to 0%).
This could also greatly affect your previous test on battery performance. To get a more accurate result, let the phone drain to about 60%, then test the time to drop a percentage point.
Click to expand...
Click to collapse
This is what the person said.
When this phone hits 100%, it STOPS CHARGING. Even plugged in, it will no longer be drawing power into your battery, yet it'll still be running on battery.
Click to expand...
Click to collapse
His entire post is incorrect, and has nothing to do with what you are talking about either.
Cirkustanz said:
What you are talking about is a suggestion that the battery meter doesn't necessarily update it's strength meter all of the time, and you even say that the phone runs off the plugged in power at this point.....
This is what the person said.
His entire post is incorrect, and has nothing to do with what you are talking about either.
Click to expand...
Click to collapse
Before you discredit anyones post, you should understand how many battery chargers work, and the importance of them shutting off following a complete charge. Here is a quote regarding Li-ion battery maintenance :
Li-ion cannot absorb overcharge, and when fully charged the charge current must be cut off. A continuous trickle charge would cause plating of metallic lithium, and this could compromise safety. To minimize stress, keep the lithium-ion battery at the 4.20V/cell peak voltage as short a time as possible."
Many chargers have this feature built in to avoid any overheating and/or damage to the cell. I'm not saying this is the case because I have not tested whether the battery charging circuit in this particular phone, or it's charger operate, but I will say that this has been the case in MANY of it predecessors.
That being said, I think an extended battery would be a welcome addition to the options of this phone. Mine too only lasts a day at it's best. Perhaps not 1% a minute...but then again who knows?
According to some review, infinity should give 9.5 hours of play time with WIFI on. Different use results in different result for sure, but I feel like my battery life is less than that of Galaxy 10.1 and if I remember Xoom. Not matching up with iPad is understandable as no android tablet does as iPad does no multi-tasking and wifi turns off quickly after sleep. But worse than Xoom or 10.1 seems something potentially wrong with my unit.
Is there any official application that can test battery condition? In Mac, there is application called coconut battery which tells you how much of battery you can charge i.e. no battery is usually 100% of its maximal capacity and over time it loses capacity gradually but this application tells that. I wonder if there is similar for Android tablet.
By the way my usage is like reading book and comics, surfing net, not much of game. I'm in balance mode. I checked turn off WIFI while in sleep. I did 1GB+ file transfer over the WIFI. With this overall screen time of 5 hours and I only have 15% battery left. I probably won't make it to 6 hours..
Ehhh... as far as I can tell, the Prime (and consequently, the Infinity) should outrun any iPad as to battery life. What's your scree brightness?
I get like 6-7 browsing, 9-10 reading pdfs and much less gaming (balanced mode, brightness 30%). You can see some averages and estimates in the Battery HD app / widget.
---------- Post added at 01:23 AM ---------- Previous post was at 01:22 AM ----------
MartyHulskemper said:
Ehhh... as far as I can tell, the Prime (and consequently, the Infinity) should outrun any iPad as to battery life. What's your scree brightness?
Click to expand...
Click to collapse
Outrun iPad?? Maybe with the dock. Sorry...
Outrun iPad?? Maybe with the dock. Sorry...[/QUOTE]
On the crApple forums, loads of people report a consistent 7 hours of use for the iPad3 (or the new iPad, or whatever the thing is called). The TF700 should eat it alive with the dock attached, whereas they'd come out about equal when going face to face 'barehanded'.
EDIT: nice test: http://www.tomshardware.com/reviews/galaxy-tab-android-tablet,3014-11.html of the OLD iPad2 vs. Transformer 101. Yes, agreed, it is old, but the iPad3 has double the power consumption and only 70% more battery capacity. You go figure.
MartyHulskemper said:
Outrun iPad?? Maybe with the dock. Sorry...
Click to expand...
Click to collapse
On the crApple forums, loads of people report a consistent 7 hours of use for the iPad3 (or the new iPad, or whatever the thing is called). The TF700 should eat it alive with the dock attached, whereas they'd come out about equal when going face to face 'barehanded'.
EDIT: nice test: http://www.tomshardware.com/reviews/galaxy-tab-android-tablet,3014-11.html of the OLD iPad2 vs. Transformer 101. Yes, agreed, it is old, but the iPad3 has double the power consumption and only 70% more battery capacity. You go figure. [/QUOTE]
I agree with the table as I owned Xoom, Galaxy 10.1, and currently have iPad 2 and Infinity. I don't know about New Ipad. But in my experience iPad 2 always give solid 10 hours or so but again that's probably not fair comparison against Infinity which uses HD screen. So I was going off of http://www.engadget.com/2012/06/25/asus-transformer-pad-infinity-tf700-review/, which shows Infinity having superior battery than the most of newer versions of Xoom 2, Galaxy 2 10.1 etc. I have no doubt with Docking station, Infinity's battery life would be unbeatable except by transformer prime.
But my concern was actually if my unit battery is semi-defective and not charging to full way.
I usually have my screen brightness turned all way down; whereas, above test is 50%... so I was surprised my result. Unless 1GB transfer consumed so much or overnight standby consumed a lot (despite turned off WIFI box checked..). Since we cannot really go off by battery screen on ICS with inifinity, which shows WIFI more than screen... I just have no good way to assess the condition of my battery...
HoushaSen said:
I agree with the table as I owned Xoom, Galaxy 10.1, and currently have iPad 2 and Infinity. I don't know about New Ipad. But in my experience iPad 2 always give solid 10 hours or so but again that's probably not fair comparison against Infinity which uses HD screen. So I was going off of http://www.engadget.com/2012/06/25/asus-transformer-pad-infinity-tf700-review/, which shows Infinity having superior battery than the most of newer versions of Xoom 2, Galaxy 2 10.1 etc. I have no doubt with Docking station, Infinity's battery life would be unbeatable except by transformer prime.
But my concern was actually if my unit battery is semi-defective and not charging to full way.
I usually have my screen brightness turned all way down; whereas, above test is 50%... so I was surprised my result. Unless 1GB transfer consumed so much or overnight standby consumed a lot (despite turned off WIFI box checked..). Since we cannot really go off by battery screen on ICS with inifinity, which shows WIFI more than screen... I just have no good way to assess the condition of my battery...
Click to expand...
Click to collapse
Are you sure that you Infinity is going into deep sleep? There are many cases where a "rogue" app will cause the tablet to never enter deep sleep, thereby draining the battery much faster in standby. You can check for deep sleep with CPU Spy...
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
I still need to do a scientific test but today at work my screen was on for 3.5 hours and the tablet was off the charger for 11.5 hours. My battery was down to 32%. My screen brightness is IPS off and fixed at around 90%. Looks lovely
I ran my xoom for 2 hours even and 2 hours off charger. During this time however I downloaded a bunch of apps, loaded up all the apps, ran weather bug looking at weather maps, and did some browsing. I was using it continuously to get the feel compared to my infinity.
Anyway after all that the xoom was around 77% batter remaining.
I know that when I tested my xoom soon after I got it I could get around 6.5 hours on the screen before it ran down. On standby it barely uses anything. I'm guessing I use it at work around 3-4 hours. Sometimes I'd forget to charge my xoom and the next day it would usually get me though most of the day... To maybe 1-2pm and I come in at 6:30 so thats almost my whole day.
So yes the battery is definitely less. Tomorrow I'm putting the screen brightness on auto. Thats how had the xoom so maybe it will be a better comparison. Certainly looking at battery usage the screen was using a lot of power. What looks REALLY odd however is that wifi is my number one battery usage.
That just doesn't look right does it? Now I do have it on wifi all day so in this case for 11.5 hours. But I don't on my phone wifi is like 3%... Maybe my tablet and problems are related to an issue with wifi?
Anyone else keep their wifi on notice a big power drain on wifi?
check to see if you have a battery leak with some app. turn gps off, dont use auto brightness lol. keep it down more like 65 % indoors you dont need more than that. use the app called juice defender and make sure you kill off anything your not using. google a list of top 10 thigns to do to android to make battery last longer
ethion said:
Maybe my tablet and problems are related to an issue with wifi?
Anyone else keep their wifi on notice a big power drain on wifi?
Click to expand...
Click to collapse
Yes - I do. My TF700, no dock, seemingly handles just about 4 - 5 hours of activity (not stand by but actual use, be it video, audio, browsing, etc), and when I look at the battery stats under settings - it shows that over 80% went into wi-fi.
I have heard that to make up for the weak Prime's reception ASUS overpowered Infinity wi-fi, so it sucks power out of the battery pretty fast.
I am also assuming that as usual, based on latest update, serial number, QA, etc, the behavior will be different for different tablets, some will see it and some will not.
Good news is that these things are fixable by a soft patch, so we shall see something released by ASUS if many people complain.
So I still have to do more testing, but I guess my tablet is not defective (at least in regards to the battery). i do get pretty much the same result as others replied me back here. After checking the ASUS main site, 14 hours with Dock was measured in Power Saving mode, 720p movie, WIFI on.
So key here was indeed power saving mode, which I was not using. i just switched to Power Saving mode and just looking at 10% drop mark, it seems to go ~50 minutes, which equates similar to what 9.5 hours one site suggested. Application (as far as what I use) runs fine and seems as smooth BUT main thing noticed here is refresh rate of the screen in power save mode seems much lower so when I go back to main screen, i can see some flickering.
But it's great to be able to boost battery life by couple hours and more.
With the device off - - after a full charge, my battery says 97 percent....NEVER 100%. With the charger plugged in, while using the device, I get a max 98 percent charge. Anyone having a similar experience? Does the device actually use 2% of
the battery when turning it on? I'm befuddled.
xRevilatioNx said:
With the device off - - after a full charge, my battery says 97 percent....NEVER 100%. With the charger plugged in, while using the device, I get a max 98 percent charge. Anyone having a similar experience? Does the device actually use 2% of
the battery when turning it on? I'm befuddled.
Click to expand...
Click to collapse
Do you usually drain the battery all way down after each use or close to it?
Got my tab yesterday. After charging I did some I would say normal usage, browsing, installing some apps, transfering data, watching video and a cam chat for about 2 hours on skype, standby over night.
I used balanced mode, auto brightness, external speaker on highest volume, sometimes superips (but not for long), always had the external sdcard mounted, always wifi on, gps on, autorotate on.
I had >14h without the dock, should have made a screenshot.
I will do a drain test when I charged the battery 4 or 5 times.
---------- Post added at 01:48 PM ---------- Previous post was at 01:46 PM ----------
xRevilatioNx said:
With the device off - - after a full charge, my battery says 97 percent....NEVER 100%. With the charger plugged in, while using the device, I get a max 98 percent charge. Anyone having a similar experience? Does the device actually use 2% of
the battery when turning it on? I'm befuddled.
Click to expand...
Click to collapse
Also when the device is charged up to 80% disable everything, wifi, gps and so on.
Then suspend the device and do not turn it on for at least 1 hour.
I do it that way and get 100%.
HoushaSen said:
Do you usually drain the battery all way down after each use or close to it?
Click to expand...
Click to collapse
Got my replacement yesterday. That was my first full charge. I allowed it to charge to 75% then turned it on (while still charging) and set it all up. I had the charger plugged in for 10 hours while playing around with it. Went to bed, turned it off and let it charge for another 4 hours. When I turned it off . I noticed it was only at a 97% charge.
I'm using it now to let it drain to zero. Then will do another full charge. I've only had it on for 90 minutes on balanced setting and the battery is already showing a 40% drain.
For those worried about the battery only being charged to 97-98%: it's normal, and a way to conserve your battery. Li-ion batteries don't like going to 100% full charge since it increases the temperature a lot and in the long term reduces their capacity. So the battery gets (very shortly) charged to 100% (or very close to it), then it will decrease slightly to high 90s and the charger will go into maintenance charging, keeping it close to 100% charge.
Some manufacturers "masquerade" this by setting the percentage to show 100% even if it really isn't. Keeps users from losing sleep over trivial things like that
The batteries don't like deep discharges either, so there's no use emptying them completely. Top them off whenever you can. Anywhere in between 40% and 80% is good.
TL;DR: Don't worry, the battery is fully charged even though it says 97 or 98%. Don't empty the battery completely.
Edit: Some useful information regarding Li-ion batteries here, http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries/
Thanks for this, but there was some discussion with these studies already. But probably it's right not to do anything extreme.
That being said, we probably have to admit that there is a reason to DISCHARGE and CHARGE FULLY a few times - so that all the apps/widgets that measure battery capacity, estimate life etc. could learn all they can by more (and more exact) data.
Einride said:
For those worried about the battery only being charged to 97-98%: it's normal, and a way to conserve your battery. Li-ion batteries don't like going to 100% full charge since it increases the temperature a lot and in the long term reduces their capacity. So the battery gets (very shortly) charged to 100% (or very close to it), then it will decrease slightly to high 90s and the charger will go into maintenance charging, keeping it close to 100% charge.
Some manufacturers "masquerade" this by setting the percentage to show 100% even if it really isn't. Keeps users from losing sleep over trivial things like that
The batteries don't like deep discharges either, so there's no use emptying them completely. Top them off whenever you can. Anywhere in between 40% and 80% is good.
TL;DR: Don't worry, the battery is fully charged even though it says 97 or 98%. Don't empty the battery completely.
Edit: Some useful information regarding Li-ion batteries here, http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries/
Click to expand...
Click to collapse
Thanks for the info! Good to know that you don't have have to do a complete battery drain, initially. Or ever for that matter.. :good:
Anyone having charging issue. I ran my shield battery down when I first got it. Then I plug it in to charger. Its been charging over 8 hours and still not at 100 percent. took it off charge at 80 percent. No way it should take this long. I read on reviews it took like 4 to 5 hours.
evobunny said:
Anyone having charging issue. I ran my shield battery down when I first got it. Then I plug it in to charger. Its been charging over 8 hours and still not at 100 percent. took it off charge at 80 percent. No way it should take this long. I read on reviews it took like 4 to 5 hours.
Click to expand...
Click to collapse
You used the charger that it came with? And you're not playing games the entire time it's charging, right?
agrabren said:
You used the charger that it came with? And you're not playing games the entire time it's charging, right?
Click to expand...
Click to collapse
yes I use charger that came with it. and it was charging over night when I was sleeping.
That sounds really odd. What does the battery usage say for the device? Was it awake the whole time? Does it think it was charging all night?
Sent from my HTC One using XDA Premium HD app
I feel like that has happened on my nexus 7 before. I bet it is an android thing. I would try again and see if it acts up a second time.
agrabren said:
That sounds really odd. What does the battery usage say for the device? Was it awake the whole time? Does it think it was charging all night?
Sent from my HTC One using XDA Premium HD app
Click to expand...
Click to collapse
when I was charging, i close the screen. so it went to sleep. I dont know how you can tell if it think it was charging all night. I went to battery info and its said 13.6 hours on battery. and 48 percent of that was screen usage. rest was on game and apps.
evobunny said:
when I was charging, i close the screen. so it went to sleep. I dont know how you can tell if it think it was charging all night. I went to battery info and its said 13.6 hours on battery. and 48 percent of that was screen usage. rest was on game and apps.
Click to expand...
Click to collapse
If you go into the "Battery Info" and touch on the graph area, it'll show you below some bars of time spent on different functions (like charging)
evobunny said:
when I was charging, i close the screen. so it went to sleep. I dont know how you can tell if it think it was charging all night. I went to battery info and its said 13.6 hours on battery. and 48 percent of that was screen usage. rest was on game and apps.
Click to expand...
Click to collapse
1. Sometimes the battery indicator on Android can take a while to figure out your battery. It might drop 5 percent in ten minutes then take an hour to drop 5 more.
2. The vent area on my Shield seems warmer than the surrounding plastic even when in sleep for a while, so it may be drawing more power than is charging. Just try turning it off and charging it.
oushidian said:
1. Sometimes the battery indicator on Android can take a while to figure out your battery. It might drop 5 percent in ten minutes then take an hour to drop 5 more.
2. The vent area on my Shield seems warmer than the surrounding plastic even when in sleep for a while, so it may be drawing more power than is charging. Just try turning it off and charging it.
Click to expand...
Click to collapse
Which vent area? Front or back? Because batteries do warm up when you charge them, and those are some big batteries (and a full 2 amp charge)
agrabren said:
Which vent area? Front or back?
Click to expand...
Click to collapse
The smooth part on the bottom back with the model number, FCC, etc. And it's not when I'm charging but when the lid is closed. If I manually power it down then the warm goes away.
i never recommend running your device down when it comes straight out the box. usually i tell people to just fully charge the device first before running it dry therefore it can register the full battery, personally i would not leave a device connected over night just for the simple fact that it can be one in a million that the device might get screwed over a long period of time.
it be nice to know if the problem is fixed or not and what you did just in case others run into this same problem.
ive had no charging issues yet. batts do tend to get nice and warm tho.
but for what its worth i just noticed that im still getting notification sounds from my Shield even tho the lid is closed. so maybe its some kind of hybrid sleep and if you have some rogue app pulling a ton of CPU cycles & its not going into full sleep so its taking longer to charge?
just some food for thought on your issue
s0me guy said:
ive had no charging issues yet. batts do tend to get nice and warm tho.
but for what its worth i just noticed that im still getting notification sounds from my Shield even tho the lid is closed. so maybe its some kind of hybrid sleep and if you have some rogue app pulling a ton of CPU cycles & its not going into full sleep so its taking longer to charge?
just some food for thought on your issue
Click to expand...
Click to collapse
Like most Android devices, the device goes to "sleep". Unless you power it off, it still handles notifications, and it still talks on WiFi. But it should consume very little power.
elitecmdr666 said:
i never recommend running your device down when it comes straight out the box. usually i tell people to just fully charge the device first before running it dry therefore it can register the full battery, personally i would not leave a device connected over night just for the simple fact that it can be one in a million that the device might get screwed over a long period of time.
it be nice to know if the problem is fixed or not and what you did just in case others run into this same problem.
Click to expand...
Click to collapse
Modern devices use LiPi or Li-ion batteries, these explode when overcharged (seriously, youtube search overcharge lipo). As a result all devices sold with this kind of battery have charge monitoring tools and will disconnect the battery from the charging circuit when full, also they should then run purely from the mains power when the battery is full rather than running on the battery again (they don't like the repeat connect/disconnect effect that would lead to). End result, can't overcharge it.
The heat on mains power tends to be from the voltage regulator. These devices don't run on 5V power like comes from the charger. They tend to use a combo of switch mode and linear regulators to drop the 5V to 3.3V for the CPU and peripherals (3.3 is most common at any rate). Linear regulators in particular get quite warm. Switch mode regulators don't get so warm but don't give a clean output the CPU will run nicely on, they have the odd drop or spike which would either reset or fry the CPU, so generally what happens is the switch mode reg drops a large chunk of the voltage and then feeds it into a linear reg to drop the rest of the way (*the less voltage a linear reg has to drop the less heat it produces). From 5V to 3.3V it is most likely going to be purely a linear regulator, with the CPU and screen drawing at least 1A of current and a 1.7V drop that would equate to 1.7W of heat produced, not much, but enough that if you were to put your finger on the bare regulator chip it would come away red, hold it there long enough and it would be somewhat like those competitions kids have over who can keep their hand on the hot radiator longest That is the main reason they will get hot.
The batteries in these devices are usually 3.7V, that would need a separate regulator from above, and another regulator would still be needed to go from 3.7 > 3.3. 3.7>3.3 would not get so warm. 5>3.7 would still be warm as above.
Never fully drain a LiPo. Gets too low and you damage the cell ir-repairably. When the device claims it is at 0% charge and shuts off is usually closer to 10-20% charge. But that is still considered too low by some people. General advice if you want to prolong the lifetime of your battery is to turn the device off and charge it when it reports somewhere around 5-10% charge.
Batteries do get warm while charging. But my bet is that the voltage regulators would be far more significant heat producers.
agrabren said:
Like most Android devices, the device goes to "sleep". Unless you power it off, it still handles notifications, and it still talks on WiFi. But it should consume very little power.
Click to expand...
Click to collapse
good to know. :good: i didnt think closing the lid was the same as pushing the power button on my phone to turn the screen off.
but the OP's problems still might be "sleep" related.
prime example my SGS3 batt life started to tank after the 1st VZW JB update. it took twice as long to charge & would never "sleep" (cuz of the OS not a app) but since the Tegra 4 is a much higher profile chip it could suck a bit more juice if its not being aloud to fully sleep, for whatever reason.
like you said tho, looking at the battery stats could easily tell us if this is the issue.
SixSixSevenSeven said:
Modern devices use LiPi or Li-ion batteries, these explode when overcharged (seriously, youtube search overcharge lipo). As a result all devices sold with this kind of battery have charge monitoring tools and will disconnect the battery from the charging circuit when full, also they should then run purely from the mains power when the battery is full rather than running on the battery again (they don't like the repeat connect/disconnect effect that would lead to). End result, can't overcharge it.
The heat on mains power tends to be from the voltage regulator. These devices don't run on 5V power like comes from the charger. They tend to use a combo of switch mode and linear regulators to drop the 5V to 3.3V for the CPU and peripherals (3.3 is most common at any rate). Linear regulators in particular get quite warm. Switch mode regulators don't get so warm but don't give a clean output the CPU will run nicely on, they have the odd drop or spike which would either reset or fry the CPU, so generally what happens is the switch mode reg drops a large chunk of the voltage and then feeds it into a linear reg to drop the rest of the way (*the less voltage a linear reg has to drop the less heat it produces). From 5V to 3.3V it is most likely going to be purely a linear regulator, with the CPU and screen drawing at least 1A of current and a 1.7V drop that would equate to 1.7W of heat produced, not much, but enough that if you were to put your finger on the bare regulator chip it would come away red, hold it there long enough and it would be somewhat like those competitions kids have over who can keep their hand on the hot radiator longest That is the main reason they will get hot.
The batteries in these devices are usually 3.7V, that would need a separate regulator from above, and another regulator would still be needed to go from 3.7 > 3.3. 3.7>3.3 would not get so warm. 5>3.7 would still be warm as above.
Never fully drain a LiPo. Gets too low and you damage the cell ir-repairably. When the device claims it is at 0% charge and shuts off is usually closer to 10-20% charge. But that is still considered too low by some people. General advice if you want to prolong the lifetime of your battery is to turn the device off and charge it when it reports somewhere around 5-10% charge.
Batteries do get warm while charging. But my bet is that the voltage regulators would be far more significant heat producers.
Click to expand...
Click to collapse
yes while all this your saying is true i still wont risk it. i say this from experience had a note 10.1 and would leave it over night charging and sure enough it ended up screwing up. might of been there was something wrong with the device itself but still. good post on your behalf though :laugh:
but still im paranoid and prefer to just disconnect once its charge it wont hurt
elitecmdr666 said:
yes while all this your saying is true i still wont risk it. i say this from experience had a note 10.1 and would leave it over night charging and sure enough it ended up screwing up. might of been there was something wrong with the device itself but still. good post on your behalf though :laugh:
but still im paranoid and prefer to just disconnect once its charge it wont hurt
Click to expand...
Click to collapse
I tend to go into way too much detail sometimes :/
Disconnecting can't harm it at least if that's what you prefer.
As for info source. Quite into electronics and robotics, intact the shield would make a good controller for robotics purposes
well i did my second charge last night. and this time much faster, about 5 hours to 100 percent. guess i dont have a problem after all. dont know what happen the first time.
SixSixSevenSeven said:
I tend to go into way too much detail sometimes :/
Disconnecting can't harm it at least if that's what you prefer.
As for info source. Quite into electronics and robotics, intact the shield would make a good controller for robotics purposes
Click to expand...
Click to collapse
no worries lol i tend to get spaced out at times and go into details does not hurt to enlighten people :good: