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I seems like we have a discrepancy in how much battery life a TF uses in standby. Some folks seem to be burning <1%/hour, others >3%/hour. Obviously, this makes a huge difference in the total time a TF can be expected to last on a charge.
Please indicate how much yours burns per hour. Please ONLY answer if you run your TF as follows:
1. NOT in airplane mode
2. With wifi in the default (run in background) configuration
What setting is to run wifi in the background?
Also, would the number of apps (singned in) and thinks like exchange emails factor into this?
IIJBII said:
What setting is to run wifi in the background?
Also, would the number of apps (singned in) and thinks like exchange emails factor into this?
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Click to collapse
Yep, a lot of things could impact this. But, the dichotomy seems so clear-cut (literally, <1%/hour for some people vs. >3%/hour for others) that I don't think those things by themselves can account for the difference.
wynand32 said:
Yep, a lot of things could impact this. But, the dichotomy seems so clear-cut (literally, <1%/hour for some people vs. >3%/hour for others) that I don't think those things by themselves can account for the difference.
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Click to collapse
I understand and agree. There should be some type of baseline. can you explain what Wifi setting you mentioned above? I have 3 options - Sleep when screen is off, Never when plugged in and Never - I know thats not exactly how they read but its something like that.
Sent from my Transformer TF101 using Tapatalk
IIJBII said:
I understand and agree. There should be some type of baseline. can you explain what Wifi setting you mentioned above? I have 3 options - Sleep when screen is off, Never when plugged in and Never - I know thats not exactly how they read but its something like that.
Sent from my Transformer TF101 using Tapatalk
Click to expand...
Click to collapse
The default is to "Never" disconnect...
Dunno how many %/hour, but I've gotten from 14 hours to 17 hours.
Picked up the transformer once in a while, put it down, etc..
Here's a screenshot of the 14hr one, charged it at the end for a few minutes.
wynand32 said:
Yep, a lot of things could impact this. But, the dichotomy seems so clear-cut (literally, <1%/hour for some people vs. >3%/hour for others) that I don't think those things by themselves can account for the difference.
Click to expand...
Click to collapse
So you don't think the amount of data being communicated per application affects battery use in idle?
What do you think about signal strength from the WAP? (being further from the WiFi router, in another room, many walls and objects between the unit and the WAP)
FrayAdjacent said:
So you don't think the amount of data being communicated per application affects battery use in idle?
What do you think about signal strength from the WAP? (being further from the WiFi router, in another room, many walls and objects between the unit and the WAP)
Click to expand...
Click to collapse
I'm comparing my results to what I'm seeing on the Xoom, which is pretty much identically configured to my TF (same email accounts, same apps installed and running, used with the same routers, etc.). The Xoom uses well under 1%/hour on standby, the TF right around 3.5%/hour.
I'very configured my TF to turn WiFi off when sleeping.
Yesterday my TF was unplugged and unused for a full 24 hours for an 8% battery drain.
Regards,
Davw
The reason there will be discrepencies between peoples devices is because everyone installs different apps. It's these apps that drain the battery more/less, so install a battery monitoring app and check the logs every few days. If you're losing more than 1% on standby per hour, then get a task killer program and tasker, and set up schedules to turn off apps at times you dont need them. Also make sure you have actually set the battery app up properly, by changing the rating it thinks the battery is (to 6600mA) instead of any default value it has.
stuntdouble said:
The reason there will be discrepencies between peoples devices is because everyone installs different apps. It's these apps that drain the battery more/less, so install a battery monitoring app and check the logs every few days. If you're losing more than 1% on standby per hour, then get a task killer program and tasker, and set up schedules to turn off apps at times you dont need them. Also make sure you have actually set the battery app up properly, by changing the rating it thinks the battery is (to 6600mA) instead of any default value it has.
Click to expand...
Click to collapse
How would one change the battery to 6600ma instead of the default
dazz87 said:
How would one change the battery to 6600ma instead of the default
Click to expand...
Click to collapse
If you are using Battery Monitor Widget then it's from settings>monitoring preferences>battery capacity. Default was 1200mA on mine originally. If you're using some other app, I've no idea.
As an update, I decided to go ahead and do a factory restore, just for kicks. I'm not experiencing much closer standby performance to my Xoom, about 1%/hour or maybe a bit less. In four hours since the restore, I've lost 5% battery life, and that includes a bit of use.
It's possible that the battery just hasn't calibrated since the restore, and so I'll report back if things return to what they were before. At this point, though, I'm hopeful that something was corrupted or misconfigured, and that a factory restore did indeed resolve the issue.
stuntdouble said:
If you are using Battery Monitor Widget then it's from settings>monitoring preferences>battery capacity. Default was 1200mA on mine originally. If you're using some other app, I've no idea.
Click to expand...
Click to collapse
Coolthanks for the info will have to check out that app. Right now i am using battery indicator pro whicb does not have a option to change battery capacity
Another update after the factory reset: charged the TF to 100% and unplugged at midnight. At 8:00am this morning it was at 78%, so roughly 2.75%/hour discharge rate. At 10:00am (also only on standby) it was at 74%, so 2.6%/hour total for the 10 hours.
The Xoom was at 48% at 8:00am (forgot to note its battery life at midnight), and at 10:00am (also on standby) was at 47%. So, the Xoom on standby is burning .5%/hour, which has been my general experience with it.
Both the Xoom and the TF are configured with the same email accounts and settings, the same general configuration (wifi, etc.), and the same apps except for the Asus apps. Since my experience on standby was roughly the same with the original (non-updated) TF build, I don't think it's the Asus apps that are causing the burn.
If most others were experiencing the same thing, I'd write this off as a purely academic exercise. 2.5%/hour burn rate on standby isn't terrible, particularly since I tend to charge every night anyways. My concern, though, is that if others are getting <1%/hour with the same basic settings, and as I'm getting on the Xoom for sure, then the question becomes: is there something wrong with my TF specifically?
Well my transformer is doing better than that. I lost only 3 over 5 hours. Overnight from 10 to 10 battery went from 33 to 27 percent so looking at 0.6 % per hour. Btw I have wifi set to turn off with screen off. Why do I need wifi going if I can't see the screen. For mail when would wake the device it checks the accounts immediately. So........
Sent from my Transformer TF101 using Tapatalk
I've had my TF with me most of the day letting friends play around with it so it's had what I would consider "normal" use.
Starting at 100% this morning when I left and now has 65% after ~8 hours. (See attached screenshot)
I am battery anal too but anyone else feel like discussing a 2% drain difference in idle is kind of ridiculous.. no one runs exactly the same stuff on their devices of course it will be different... to be honest if you are concered about battery drain during idle.. you obviously leave your device unused alot... in which case battery life doesn't matter a great deal cuz you aren't using it hahhha
Sent from my MB860 using XDA App
nsstrunks said:
I've had my TF with me most of the day letting friends play around with it so it's had what I would consider "normal" use.
Starting at 100% this morning when I left and now has 65% after ~8 hours. (See attached screenshot)
Click to expand...
Click to collapse
How did you get battery stats. To work?
Sent from my Transformer TF101 using Tapatalk
Kaoe said:
I am battery anal too but anyone else feel like discussing a 2% drain difference in idle is kind of ridiculous.. no one runs exactly the same stuff on their devices of course it will be different... to be honest if you are concered about battery drain during idle.. you obviously leave your device unused alot... in which case battery life doesn't matter a great deal cuz you aren't using it hahhha
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
Disagree with you. I think standby life is very important because the tablet is something you wanna pickup and have immediate access to for information a nd media without always Worrying if the battery's has enough juice. My nook color can go several days on stby and 3 to 4 days of casual use with standby. This tab doing same stuff is giving me 36 hours tops.
Cm7 on nook color has sleep issues and so doesn't enter deep sleep and so battery drain is about 2% instead of. 2% per hour on stock nook.
maybe our devices aren't sleeping deeply and draining much faster.
Something a Dev. can check?
Sent from my Transformer TF101 using Tapatalk
Hey guys a couple a days ago i flash to my phone the stock 2.3.6 the kj1 kernel and the adrenaline shot v2. My phone works great but my battery its horrible. Is this because of the adrenaline thing??
Sent from my SGH-T959V using XDA App
Calibrate your battery then give it a few days...
Sent from my SGH-T959V using XDA App
Also... flash kj6.... you are behind the times. Kj6 mostly has wifi fixed.
Sent from my SGH-T959V using XDA App
Exactly what Calamus said. I'm running KJ6, drhonk's KJ1 kernel, and Adrenaline Shot v12. I calibrated my battery (there are apps for that in the market), and my battery life is pretty good.
If I'm heavily using my phone I get a bit over half a day of battery life. That's with really heavy use (wifi calls, texting, XDA app, and other apps being used). With normal use it'll last me a day.
Im in the kj6 stock the kj1 is the kernel. Im going to look the calibrate app to see if my battery last longer. But for example sometimes i have to chrage my phone twice a day. I never let the battery drain completly if i know the battery is in 20% i charge the phone. This can happend to me twice a day. I dont talk so much i do txt a lot and use in a normal way some apps, games and wifi.
Sent from my SGH-T959V using XDA App
daworship said:
Im in the kj6 stock the kj1 is the kernel. Im going to look the calibrate app to see if my battery last longer. But for example sometimes i have to chrage my phone twice a day. I never let the battery drain completly if i know the battery is in 20% i charge the phone. This can happend to me twice a day. I dont talk so much i do txt a lot and use in a normal way some apps, games and wifi.
Sent from my SGH-T959V using XDA App
Click to expand...
Click to collapse
I've noticed wifi eats the battery quite a bit. I'd suggest turning it and other features off if you're not using them. I keep bluetooth & GPS off all of the time. I have wifi on when I'm at home as I get better coverage than on the carrier network.
Give it a few days after you calibrate it as it takes a little time for it to level out.
"Juice defender" in the market. Free version works well. paid gives a few more features. I would re calibrate after install. I have no problems getting a full day with moderate to heavy use.
Sent from my SGH-T959V using XDA App
I agree....my battery life is horrible!! I should have just bought another phone!
Sent from my SGH-T959V using xda premium
jager555 said:
I agree....my battery life is horrible!! I should have just bought another phone!
Sent from my SGH-T959V using xda premium
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Click to collapse
Lol and I'm still on froyo
Sent from my SGH-T959V using XDA App
I have been messing with juice defender and im running alot better i calibrated battery then i set up app i has lots of options like shut down at night or kill connectivity when off. If not try octane rom that gave me great batt i would run 4 hrs of sat radio and still have 40% battery after
Sent from my SGH-T959V using XDA App
Did the calibrate battery app and manage to turn off some things in my phone and i do see some good changes in my battery life overall, this is an ok device Tmobile has launch or is soon to , some really good phones but right now the only choice that i could think of is the galaxy s II i saw a video of a phone fight between the galaxy s II and the iphone 4s and the iphone won in so many ways, but till this day and looking forward to android 4.0 im a Android fanatic 100%
An architect buddy of mine who is a big iPhone guy ( iPhone 1 to new iPhone 4s recently) was playing around with my sgs4g a week or so ago, it was the first Android phone he had ever messed with. He was taking about how great his iPhone battery life was (true) when i got a facebook notification come through, followed by a twitter notification, while he was using the imdb app. "Your phone can do more than one thing at a time?" He asked....
"Sure, yours can't?" i asked in return.
"No, i gotta physically open Facebook to check messages, then close it afterwards." He said.
"Wow that really sucks, i see why your battery life is so great though." I commented.
.....silence...."F this I'm buying an Android" he said, and he did....a galaxy s2 and he said it pwns the iPhone 4s he just bought and traded. True story.
I guess its a tradeoff, great battery life or ultra versatile multi tasking usability. I understand that some people do prefer the iPhone, and they are great...if that's what you want....but for a review to state an iPhone 4s beats a galaxy s2 in almost every test is laughable and i would have to question the reviewers reliability and validity.
Once you get the phone set up right, undervolted etc the battery life is quite acceptable considering its performance. I have got almost 2 days with light use, and can comfortably get 8 to 9 hours with heavy use.
Sent from my SGH-T959V using XDA App
The tips that I picked up on is:
Disable any OC and/or non-standard governor, don't run too many apps while charging.
Charge the phone up completely
After it is charged completely, your calibration app should show you the mVh, unplug the power wait a second and plug it back in. Mine usually gets to 4203 (or something like that. I don't have my phone back yet.). If you don't use a calibration app, spareparts should show you mVh level.
Then delete the baterystats.bin. Disconnect charger, and let the phone drain until it dies.
When it is dead. Plug it into the charger and don't touch the phone until it is fully charged. OC and non-standard governors should still be disabled or at their defaults.
After it is fully charged, use your phone like normal (again, no OC etc...), let the phone die all the way again.
Charge the phone up all the way again.
re-enable OC and/or governors.
baterystats.bin is a log of the phone's battery usage and capacity. I've also been told to do steps 6-7 over and over to get more log information into baterystats.bin to get a more reliable battery charge.
Hope this helps.
htaak said:
He was taking about how great his iPhone battery life was (true)
Click to expand...
Click to collapse
I thought the iPhone 4S has **** battery life. That's why everyone was complaining about it, right?
bhundven said:
The tips that I picked up on is:
Disable any OC and/or non-standard governor, don't run too many apps while charging.
Charge the phone up completely
After it is charged completely, your calibration app should show you the mVh, unplug the power wait a second and plug it back in. Mine usually gets to 4203 (or something like that. I don't have my phone back yet.). If you don't use a calibration app, spareparts should show you mVh level.
Then delete the baterystats.bin. Disconnect charger, and let the phone drain until it dies.
When it is dead. Plug it into the charger and don't touch the phone until it is fully charged. OC and non-standard governors should still be disabled or at their defaults.
After it is fully charged, use your phone like normal (again, no OC etc...), let the phone die all the way again.
Charge the phone up all the way again.
re-enable OC and/or governors.
baterystats.bin is a log of the phone's battery usage and capacity. I've also been told to do steps 6-7 over and over to get more log information into baterystats.bin to get a more reliable battery charge.
Hope this helps.
Click to expand...
Click to collapse
batterystats.bin is a log file - true... deletion of that file has nothing to do with calibration - it's a myth.
Android is reading SOC (state of charge) battery from fuel gauge chip. It happens this chip calculates remaining capacity wrong - so it needs to be calibrated.
Proper method depends on type of that chip. With old, colomb type of fg, you would indeed required to make a full discharge followed by full charge in order to let the chip now of how many mAh battery can get in.
Modern fg is using math model which can predict / calculate capacity based on open-circuit voltage measurements. So you don't need to stress your battery with full charge/discharge cycle.
Again, 'calibration apps' do nothing more but delete that log file - this is not how fg chip got it's calibration.
It's interesting topic - battery, current consumption, calibration. It's surrounded with that myth about batterystats.bin and various 'calibrator apps' built on top of it.
I just cannot resist this time from commenting this "facts".
---------- Post added at 11:49 PM ---------- Previous post was at 11:38 PM ----------
On topic - my sgs4g with KD1 rom, rooted, debloated standby time with wifi, 4g off, only GSM voice and SMS can lasts 5-7 days.
Some normal use - 2 days,
Reading ebook non-stop - 8 hours,
music or audio-books - 15-20 hours.
Netflix, internet on wifi non-stop - 5 hours.
bkoon1218 said:
I thought the iPhone 4S has **** battery life. That's why everyone was complaining about it, right?
Click to expand...
Click to collapse
I'm honestly not sure man. He only had it for a few days, and I don't really follow Apple. Sounds right though, if Apple gave it more "umph" you would expect the battery life to suffer.
some people were reporting issues with battery drain on the 4S, but a lot depends on how you have notifications/sync setup, and I believe apple is working on a patch.
Same thing goes with the SGS4G. First thing you want to do is check your accounts and sync. I leave Facebook turned off. It only syncs if I actually open it and log in. I only have my gmail account syncing, and it's set to sync only once an hour (using juice defender to do this).
Otherwise, wifi, BT, and GPS are off unless I am using them. I regularly get between 3 and 4 days out of a charge with light use.
Also, I've never calibrated my battery.
Vlad_z said:
batterystats.bin is a log file - true... deletion of that file has nothing to do with calibration - it's a myth.
Android is reading SOC (state of charge) battery from fuel gauge chip. It happens this chip calculates remaining capacity wrong - so it needs to be calibrated.
Proper method depends on type of that chip. With old, colomb type of fg, you would indeed required to make a full discharge followed by full charge in order to let the chip now of how many mAh battery can get in.
Modern fg is using math model which can predict / calculate capacity based on open-circuit voltage measurements. So you don't need to stress your battery with full charge/discharge cycle.
Again, 'calibration apps' do nothing more but delete that log file - this is not how fg chip got it's calibration.
It's interesting topic - battery, current consumption, calibration. It's surrounded with that myth about batterystats.bin and various 'calibrator apps' built on top of it.
I just cannot resist this time from commenting this "facts".
---------- Post added at 11:49 PM ---------- Previous post was at 11:38 PM ----------
On topic - my sgs4g with KD1 rom, rooted, debloated standby time with wifi, 4g off, only GSM voice and SMS can lasts 5-7 days.
Some normal use - 2 days,
Reading ebook non-stop - 8 hours,
music or audio-books - 15-20 hours.
Netflix, internet on wifi non-stop - 5 hours.
Click to expand...
Click to collapse
Based on this post, how do you verify that your SGS4G is actually measuring open-circuit voltage accurately and how would you make appropriate adjustments?.... assuming that the hardware is tweakable. Is there some kind of software / linux / adb command available?
htaak said:
Based on this post, how do you verify that your SGS4G is actually measuring open-circuit voltage accurately and how would you make appropriate adjustments?.... assuming that the hardware is tweakable. Is there some kind of software / linux / adb command available?
Click to expand...
Click to collapse
Regarding calibration I have some research done here
http://forum.xda-developers.com/showthread.php?t=1215182
It's possible to initiate / write down to the fg chip but for it some kind of jig cable needed or modified kernel. But fg chip designed that way it can do recalibration on its own with some time and normal usage pattern.
Open-circuit voltage chip would consider when battery is at rest and voltage change less then some mV per hour. When device is in deep sleep - conditions might be right (if there is no background activity) . To make sure - just shutdown device for couple hours. Chip is connected to the battery regardless.
Vlad_z said:
Regarding calibration I have some research done here
http://forum.xda-developers.com/showthread.php?t=1215182
It's possible to initiate / write down to the fg chip but for it some kind of jig cable needed or modified kernel. But fg chip designed that way it can do recalibration on its own with some time and normal usage pattern.
Open-circuit voltage chip would consider when battery is at rest and voltage change less then some mV per hour. When device is in deep sleep - conditions might be right (if there is no background activity) . To make sure - just shutdown device for couple hours. Chip is connected to the battery regardless.
Click to expand...
Click to collapse
I read the link you posted and will give it a whirl, thanks for the info man.
Sent from my SGH-T959V using XDA App
So I'm getting terrible battery performance for a few days last week, about 10% an hour drop even if I turn off GPS and BT, only occasionally have WIFI on, have Juicedefender on, and rarely even use the phone. And FYI, I'm on sky ics speed 7.4.
Then I delete the batterystats.bin file (via BatteryCalibration after charging to 100%) and now for the past three days I'm down to 3% an hour, with BT and GPS on, etc.
How does a file result in so much battery loss?
Post Note:
OK - so I found lots of stuff out there saying that deleting this file doesn't improve battery life. I'm OK if that's true, but what then caused my improved battery performance?
batterystats.bin is the history you see when you go to battery use. It is there to persist through reboots. It does has come other low level data but nothing special.
http://forum.xda-developers.com/archive/index.php/t-1442989.html
You should never delete the file because our batteries (MAX17042 chipset) do not require calibration.
http://www.maxim-ic.com/datasheet/index.mvp/id/6621
How to accurately calibrate if you feel the need?
http://forum.xda-developers.com/showthread.php?p=18600161
As for your change in %, it can be chalked up to the fact your battery drain test was not a proper experiement. For instance, sometimes JuiceDefender keeps wake-locks active which keep the phone from sleeping and can cause increased battery drain. Depending on your location the active search for a better cell tower will use more battery if your phone is searching for a better signal often etc. Unless the environment was completely controlled and all variables accounted there is no actual way to prove causation.
Thanks promise. Still seems odd to me in my case but I don't dispute your answer. And you're certainly right that my test wasn't conclusive. I'll keep an eye open on this and see if I get similar results in the future.
I struggle with the same thing daily and I've stopped caring haha. Bought the T989 second battery / charger from Amazon.
Sent from my SAMSUNG-SGH-I727 using Tapatalk
promiseofcake said:
I struggle with the same thing daily and I've stopped caring haha. Bought the T989 second battery / charger from Amazon.
Sent from my SAMSUNG-SGH-I727 using Tapatalk
Click to expand...
Click to collapse
Me too, and I have no need to care about it right now as I get great battery life. So until my battery sucks I am not concerned with the magic battery calibration fixers
No matter which phone you have, an iPhone or a GS3/GS2 or a Xperia device, you always fret over the battery life of your device! (Xperia owners a little more)
Instead of splashing out on expensive battery packs, here is a list of things you can do to get the maximum out of your battery :
1. It’s all about the Apps!
Many of the more than one million apps available to download to smartphones contain programming errors and software bugs that mishandle power control. This means your devices can remain active when they should be sleeping which further leads to unnecessary draining of your battery. Identify these apps! (Other apps like Carat can help you with that) and monitor there use!
Also, there is a good chance that there are apps running in the background of your phone that you think you closed or reappear each time you reboot your device. Fortunately, it’s easy to identify and correct this on the iOS and Android operating systems with a few easy steps. All open apps drain battery, so in this case, the lesser, the merrier!
2. The battery is always better on the cooler side!
Your smartphone most likely uses a Lithium Ion (Li-ion) battery. Be aware that extreme temperatures can negatively impact battery life so whenever possible keep your device in elements between 32 and 95 degrees Fahrenheit. While a frigid phone should reclaim its functionality once it returns to room temperature, an overheated device could permanently ruin your battery. Over the course of a year, prolonged exposure to climates above 95 degrees could reduce a phone capacity by as much as 35 percent.
Remove any protective cover or accessory every time your phone is being charged. When you’re walking around, keep your phone in a ventilated holster or belt clip rather than a sweaty hand or pocket. Over-charging will also contribute to an overheated phone.
3. Always look at the bright side of life! – well the screen actually!
Turn on Auto Brightness! Most phones have an ambient light sensor that adjusts the brightness of the screen based on the light around it (darker in dark places, brighter when there’s more ambient light) to both save battery and make it easier to see. Turn Auto-Brightness on and you’ll save battery because your screen will need to use less power in dark places.
If not, manually adjust your screen brightness according to your needs by accessing it from the settings menu.
4. Stay (dis)connected!
Transmitting data wirelessly takes battery and leaving Bluetooth on to accept incoming data at all times requires even more juice. Turn off Bluetooth except when you’re using it (duh!) to squeeze more juice from your battery.
3G can be a real battery zapper, especially if you’re using it in an area of marginal coverage. If in doubt, your phone probably has a toggle setting where you can set your phone to use only 2G, You will soon see an extension to battery life that way while not really compromising speed or service.
And disabling a 3G connection when not needed is just the start. If you know you’re going to be away from home or a known wireless Internet connection, turn off your Wi-Fi locator. Also, GPS is particularly handy if you find yourself navigating somewhere new, but don’t leave it on all the time if you’re not using it.
5. Zip it!
When in a meeting or a movie, switch your phone into silent mode. Unnecessary notifications will only lead to lesser battery life. Use a basic ringtone! Advanced ringtones can sound better, but the phone will die soon! Also, turning off location services and push-notifications is definitively a step-forward towards saving battery life!
If you discover your smartphone seems to be running out of battery life quicker than ever despite your habits remaining unchanged, it could be worth investing in a spare or new battery. It’s worth noting that aftermarket batteries not made by the original equipment manufacturers (OEMs) are considerably cheaper. They do, however, vary in quality. Some aftermarket batteries can be trusted, but be aware of ‘too good to be true’ prices for smartphone batteries on retailers like eBay. You could end up with junk, or worse, a faulty battery that permanently damage your device. Buy carefully and smartly from trusted retailers to be safe.
Underclock your phone to 800/1000Mhz (while you are travelling) cz SGSII can do most of the stuffs within that speed.
Use Custom kernel like siyah wch has better battery backup than stock
dont set min freq to 100MHz cz 200MHz is much more energy efficient than 100 & has more operationg power !!
Come on man, show some love for Celsius! Besides, it is what most of the world uses and is not seemingly arbitrary (or based on how cold it gets in the average american's basement)!
Anyway, well written guide, may prove useful for the lesser knowledgeable folks out there
Whilst I applaud you for putting this info together, it is not specific to the SGS2. This is SGS2 General. This kind of thread belongs General Discussion or at the very least in Android General (tho probably the former).
For 1. I would recommend using an app such as Go Power Master, as it tracks which apps are running as how much power they are using. Some apps are always running, but use very little power while others can use a lot while it is running.
Also, if this may be applicable:
If, after rooting or more likely that case after flashing a new rom, you often have battery reporting errors (as mentioned above), and re-calibrating the battery along with some steps I will outline for you below will ensure that your battery is getting a full charge, and the battery reporting accuracy is right on. As far as power cycling, I run my Atrix 2 in performance mode all the time, and with a CPU overclock of 1.25GHz and various tweaks, I have about a day an a half to a day and a quarter of full runtime from my battery. This is moderate to heavy usage (calls, emailing, text, gaming, web browsing, etc.) so you should have no problems getting acceptable battery performance after following these steps:
1. Take the case off your device (one of the latter steps involves taking the battery out from the phone while it's plugged in. Make sure your case won't stand in the way.)
2. Install Battery Calibration app from the market
3. Plug in your device to charge while it's on, wait till it gets to a 100%
4. When the charge is 100%, open the BatteryCalibration app and lookup what the charge is in MV while at 100%. Write it down.
My Atrix 2 was showing ~3400MV while at 100%, which is definitely not the maximum capacity.
5. Discharge your device completely until it shuts off.
A good way of doing this quickly is by turning on wifi, and a video player.
6. Without turning on the phone plug it into a wall charger and let it get to 100%
7. When it's at 100%, without unplugging it from the wall charger, take off the battery cover, and take the battery out.
Your phone will "reboot" and show a Missing Battery icon.
8. Without unplugging the phone from the wall charger or turning it on, put the battery back in and wait until the phone recognizes the battery.
9. Your battery should now be recognized by the phone, and showing a charge % significantly lower than 100%.
Mine showed only 5%.
10. Let it sit there charging for 2-3 hours (or more).
My phone wouldn't charge past 10%, but yours might. The numbers don't matter much as the phone is definitely getting additional charge that could have been lost while flashing ROMs, etc.
11. After 2-3 hours (or more), turn the phone on while holding the volume down button and get into CWM.
Do not disconnect it from the charger still!
12. Wipe battery stats in CWM, reboot.
Do not disconnect it from the charger still!
13. When the phone turns on, go into Battery Calibration app again and look up your MV numbers -if you were like me, they should be significantly higher than before. After this whole process I had 4351MV at 100%, comparing to 3400MV before calibration.
Do not disconnect it from the charger still!
14. Before going to sleep - Install Watchdog Task Manager Lite from the market. Go into it's preferences, set CPU threshhold to 20%, check "Include phone processes", check "Monitor phone processes", check "Display all phone processes", set system CPU threshhold to 20% as well.
Do not disconnect it from the charger still!
15. Make sure your wifi and data connections are off. Now finally unplug the phone from the charger.
Go to bed, let your phone sleep too.
16. Success! Next morning check where your battery % is at and if you followed the instructions correctly / got lucky like me, your battery life should be 90% or more.
I went to bed with 98% and woke up to 94%. So, I consider this mission a success.
Sent from my SAMSUNG-SGH-I747 using xda premium
A samsung developer actually said that whiping battery stats doesn't matter at all, it was on the XDA frontpage some time ago
AOKP undercloking
sekhargreen said:
No matter which phone you have, an iPhone or a GS3/GS2 or a Xperia device, you always fret over the battery life of your device! (Xperia owners a little more)
Instead of splashing out on expensive battery packs, here is a list of things you can do to get the maximum out of your battery :
1. It’s all about the Apps!
Many of the more than one million apps available to download to smartphones contain programming errors and software bugs that mishandle power control. This means your devices can remain active when they should be sleeping which further leads to unnecessary draining of your battery. Identify these apps! (Other apps like Carat can help you with that) and monitor there use!
Also, there is a good chance that there are apps running in the background of your phone that you think you closed or reappear each time you reboot your device. Fortunately, it’s easy to identify and correct this on the iOS and Android operating systems with a few easy steps. All open apps drain battery, so in this case, the lesser, the merrier!
2. The battery is always better on the cooler side!
Your smartphone most likely uses a Lithium Ion (Li-ion) battery. Be aware that extreme temperatures can negatively impact battery life so whenever possible keep your device in elements between 32 and 95 degrees Fahrenheit. While a frigid phone should reclaim its functionality once it returns to room temperature, an overheated device could permanently ruin your battery. Over the course of a year, prolonged exposure to climates above 95 degrees could reduce a phone capacity by as much as 35 percent.
Remove any protective cover or accessory every time your phone is being charged. When you’re walking around, keep your phone in a ventilated holster or belt clip rather than a sweaty hand or pocket. Over-charging will also contribute to an overheated phone.
3. Always look at the bright side of life! – well the screen actually!
Turn on Auto Brightness! Most phones have an ambient light sensor that adjusts the brightness of the screen based on the light around it (darker in dark places, brighter when there’s more ambient light) to both save battery and make it easier to see. Turn Auto-Brightness on and you’ll save battery because your screen will need to use less power in dark places.
If not, manually adjust your screen brightness according to your needs by accessing it from the settings menu.
4. Stay (dis)connected!
Transmitting data wirelessly takes battery and leaving Bluetooth on to accept incoming data at all times requires even more juice. Turn off Bluetooth except when you’re using it (duh!) to squeeze more juice from your battery.
3G can be a real battery zapper, especially if you’re using it in an area of marginal coverage. If in doubt, your phone probably has a toggle setting where you can set your phone to use only 2G, You will soon see an extension to battery life that way while not really compromising speed or service.
And disabling a 3G connection when not needed is just the start. If you know you’re going to be away from home or a known wireless Internet connection, turn off your Wi-Fi locator. Also, GPS is particularly handy if you find yourself navigating somewhere new, but don’t leave it on all the time if you’re not using it.
5. Zip it!
When in a meeting or a movie, switch your phone into silent mode. Unnecessary notifications will only lead to lesser battery life. Use a basic ringtone! Advanced ringtones can sound better, but the phone will die soon! Also, turning off location services and push-notifications is definitively a step-forward towards saving battery life!
If you discover your smartphone seems to be running out of battery life quicker than ever despite your habits remaining unchanged, it could be worth investing in a spare or new battery. It’s worth noting that aftermarket batteries not made by the original equipment manufacturers (OEMs) are considerably cheaper. They do, however, vary in quality. Some aftermarket batteries can be trusted, but be aware of ‘too good to be true’ prices for smartphone batteries on retailers like eBay. You could end up with junk, or worse, a faulty battery that permanently damage your device. Buy carefully and smartly from trusted retailers to be safe.
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Click to collapse
Actually I underclock my GS2 to 800Mhz thanks to an AOKP Rom and my battery last one hour or one hour and a half more, which is great when you just have 7/8 hours of battery life normally. It didn't really affect the use of common apps, but of course if you want to play big 3D games, I suggest you to clock it a its original rate (1.2Ghz for the GS2 for example).
---------- Post added at 01:26 PM ---------- Previous post was at 01:21 PM ----------
Neefy said:
A samsung developer actually said that whiping battery stats doesn't matter at all, it was on the XDA frontpage some time ago
Click to expand...
Click to collapse
Yes I think so because this is just statistics, it will not affect the actual battery life of the phone.
Apex_Strider said:
Also, if this may be applicable:
If, after rooting or more likely that case after flashing a new rom, you often have battery reporting errors (as mentioned above), and re-calibrating the battery along with some steps I will outline for you below will ensure that your battery is getting a full charge, and the battery reporting accuracy is right on.
<Snip>
Sent from my SAMSUNG-SGH-I747 using xda premium
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Click to collapse
This is bump charging and while it does work, it is not good for Li-on batteries. I'll find the link and edit it back in but bump charging will shorten the life of your battery due to inconsistent charge cycles.
Neefy said:
A samsung developer actually said that whiping battery stats doesn't matter at all, it was on the XDA frontpage some time ago
Click to expand...
Click to collapse
This is from my battery guide. OP (or anyone for that matter), feel free to check it out. There is far more information, apps, deep memory management trick,... Link is in my signature.
Batter Calibrator –
<Snip>
**Note that this can be done two other ways. You can boot into CWR or Custom Recovery and go to Advanced Settings and there will be the Wipe Batterystats.bin option. Or you can do it manually by going into /data/system/ and deleting the batterystats.bin in there. Any of the three methods work to get the entirely same result in the end. I just like using the app or manually myself. **
<Snip>
Recently there has been information debunking this process. I will post it below, however I know what it says, but I also know what I've seen/experienced too. Here is the post by Dianne Hackborn, a Google Dev on her G+ account.
Dianne Hackborn - Jan 12, 2012 - Public
Today's myth debunking:
"The battery indicator in the status/notification bar is a reflection of the batterystats.bin file in the data/system/ directory."
No, it does not.
This file is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings.
That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
Deleting it is not going to do anything to make your more device more fantastic and wonderful... well, unless you have some deep hatred for seeing anything shown in the battery usage UI. And anyway, it is reset every time you unplug from power with a relatively full charge (thus why the battery usage UI data resets at that point), so this would be a much easier way to make it go away.
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Neefy said:
A samsung developer actually said that whiping battery stats doesn't matter at all, it was on the XDA frontpage some time ago
Click to expand...
Click to collapse
The point of doing so is if you happen to get incorrect battery reporting, which DOES occur in certain capacities. So, in my book as well as many others, it does matter for these situations. If only one developer told you the world was flat, would you believe that also?
Sent from my SAMSUNG-SGH-I747 using xda premium
Thanks for the useful information!
Great information that applies to any phone, thank you.
Sent from my SPH-D710 using xda app-developers app
sekhargreen said:
No matter which phone you have, an iPhone or a GS3/GS2 or a Xperia device, you always fret over the battery life of your device! (Xperia owners a little more)
Instead of splashing out on expensive battery packs, here is a list of things you can do to get the maximum out of your battery...<snip>
Click to expand...
Click to collapse
Apex_Strider said:
Also, if this may be applicable: <snip>
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
Great info/tips from both members above. Thanks button thanked for both!
Fosho bro thanks a lot...simple tips
Sent from my One X using xda app-developers app
Actually I could only save battery on my MEIZU by underclocking & battery saver app.
Thanks for your infos, I'll give some of them a try now (again )
Nice information... thanks for sharing..
You can also buy a better battery for your phone. They normally are cheap too
Sent from my HTC Sensation Z710e using xda app-developers app
I just turn on power saving mode. But I still need to recharge my phone daily, once in two days if I'm lucky. But after reading this topic I will see if I can scratch those pesky powerhungry little demons.
Sent from my GT-I9300 using xda app-developers app
Apex_Strider said:
The point of doing so is if you happen to get incorrect battery reporting, which DOES occur in certain capacities. So, in my book as well as many others, it does matter for these situations. If only one developer told you the world was flat, would you believe that also?
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
Battery stats has nothing to do with battery reporting. And it was an engineer from Google's Android team that debunked the battery stats wives' tale.
So yeah, folks probably should believe a recognized subject matter expert when they clearly and concisely debunk misinformation such as the advice to wipe battery stats.
Also, it bears mentioning that the os clears battery stats upon every reboot, making the advice to do so even more pointless than it already is.
Sent from my Galaxy Nexus using Tapatalk 2
Great tips...definately learned something! Much appreciated!!
Sent from my SGH-T989 using xda app-developers app
Hi everyone!!
I'd like to get some advice about my issue that I've been having for a while...
My battery drain is what you may see in my attachments. Please tell me some good advice to reduce this drain or whether it is normal functioning either...
In conclusion, I'd like to know if it might be convenient to replace the battery and, furthermore, whether there are larger batteries with more autonomy.
My phone is 2 years and half old but to be honest I use it intensively with its battery-case (manufacturer: Newdery).
Thanks!!!
Sorry for late reply, just saw this.
You get 6 hours of battery life with 14% screen on time? That doesn't sound to correct.
My suggestion would be to install the app: AccuBattery. I swear by it - it is very good I think. It will watch your apps much better than the stock android battery monitor. It will also tell you your battery health, the mAh left out of the total of 4000. If you have a very low amount left (capacity wise) then you may want to get a new battery. But make sure to do several charges before taking it as accurate. Use the app for several days, even the little "notes" in the app will tell you this - it's to "acclimate" to your use and give you more accurate statistics.
Hopefully this helps - 6 hours is definitely not good.
theslam08 said:
Sorry for late reply, just saw this.
You get 6 hours of battery life with 14% screen on time? That doesn't sound to correct.
My suggestion would be to install the app: AccuBattery. I swear by it - it is very good I think. It will watch your apps much better than the stock android battery monitor. It will also tell you your battery health, the mAh left out of the total of 4000. If you have a very low amount left (capacity wise) then you may want to get a new battery. But make sure to do several charges before taking it as accurate. Use the app for several days, even the little "notes" in the app will tell you this - it's to "acclimate" to your use and give you more accurate statistics.
Hopefully this helps - 6 hours is definitely not good.
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Click to collapse
Hi!!
Thank you very much for your reply!
I forgot it but I already had Accubattery installed on my phone.
In fact, in attachment you have the battery wear data from April 2021 till now..
I hope that I shared you useful data to analyse the issue.
What do you think? What should I take from the app?
I thought that the new Android version 11 is the cause of battery drain as another phone (Xiaomi Redmi Note 10) suffers from it after the upgrade to Android 11..
umby75 said:
Hi!!
Thank you very much for your reply!
I forgot it but I already had Accubattery installed on my phone.
In fact, in attachment you have the battery wear data from April 2021 till now..
I hope that I shared you useful data to analyse the issue.
What do you think? What should I take from the app?
I thought that the new Android version 11 is the cause of battery drain as another phone (Xiaomi Redmi Note 10) suffers from it after the upgrade to Android 11..
Click to expand...
Click to collapse
No prob
Could you take an [extended/full] screenshot of the "Discharge" tab? That will show more info about which app is draining more. Also those numbers change I believe on every charge so you'd have to just keep an eye on which app is always at the top of the section under "Foreground App Battery Usage > Battery Usage" section. Hopefully it isn't just "system" or something, hopefully it is an app that you can remove/freeze.
And what does it say for Battery Capacity above the "Battery Wear" chart?
And speaking of the wear chart, you'll want to stop charging all the way to 100%, it looks like you're putting over 1 cycle of wear on the battery very often which will degrade the battery quicker. The 'Charging" tab explains this even allowing you to set a reminder to unplug at a certain charge level (it tells you the higher you charge the more wear you put on the battery - unfortunately that's how batteries work).
theslam08 said:
No prob
Could you take an [extended/full] screenshot of the "Discharge" tab? That will show more info about which app is draining more. Also those numbers change I believe on every charge so you'd have to just keep an eye on which app is always at the top of the section under "Foreground App Battery Usage > Battery Usage" section. Hopefully it isn't just "system" or something, hopefully it is an app that you can remove/freeze.
And what does it say for Battery Capacity above the "Battery Wear" chart?
And speaking of the wear chart, you'll want to stop charging all the way to 100%, it looks like you're putting over 1 cycle of wear on the battery very often which will degrade the battery quicker. The 'Charging" tab explains this even allowing you to set a reminder to unplug at a certain charge level (it tells you the higher you charge the more wear you put on the battery - unfortunately that's how batteries work).
Click to expand...
Click to collapse
Hi, thank you for your reply!!
I'm sorry for my late replies..
In the attachments you have what you asked me.
It seems that Facebook drains the battery a lot despite the fact that I don't use it much.
The battery wear seems to be almost one fifth of total capacity for a capacity of about 3200mhA.
I'd like to have something better...
I have set at 83% the alert to reduce the wear of the battery but I wonder how it could work fine when the phone is turned off..
No problem
So, I'm not exactly sure how you use your phone but it looks like the screen-on at 23%/hr looks pretty bad but then also it says combined time was 102 hours? I believe that means how long it's been off the charger. If that's the case you can't get any better battery life than that, that is really really good.
You mention facebook doing a lot of draining. Try researching a good app freezing option on the app store. I only did a quick search but this one came up: https://play.google.com/store/apps/details?id=com.catchingnow.icebox but read the reviews (I did a quick scan and it looks like it might work as intended) and look around maybe there is a better one. But the point of this is, to freeze any apps in that list (the accubattery foreground apps) you barely use and it will prevent them from running in the background. This will definitely give you better battery life.
And I don't see the deep sleep statistic, is that around 90hrs along with the screen off time? It should be more than the screen off time at least, because if it is then it is deep sleeping correctly (no rouge apps causing it to not deep sleep), but if it's less than the screen off time, then something (maybe facebook) is keeping the phone awake even with the screen off, causing extra battery drain.
And 83% charge is pretty good, maybe even 75% might be better, I think from 0 to 75 it's like .3 or .4 wear but it's like with these batteries once you start going over 75% it jumps in wear dramatically. And if the phone is off (turned off completely you mean?) then the battery won't gain any wear because it won't be in use at all.
theslam08 said:
No problem
So, I'm not exactly sure how you use your phone but it looks like the screen-on at 23%/hr looks pretty bad but then also it says combined time was 102 hours? I believe that means how long it's been off the charger. If that's the case you can't get any better battery life than that, that is really really good.
You mention facebook doing a lot of draining. Try researching a good app freezing option on the app store. I only did a quick search but this one came up: https://play.google.com/store/apps/details?id=com.catchingnow.icebox but read the reviews (I did a quick scan and it looks like it might work as intended) and look around maybe there is a better one. But the point of this is, to freeze any apps in that list (the accubattery foreground apps) you barely use and it will prevent them from running in the background. This will definitely give you better battery life.
And I don't see the deep sleep statistic, is that around 90hrs along with the screen off time? It should be more than the screen off time at least, because if it is then it is deep sleeping correctly (no rouge apps causing it to not deep sleep), but if it's less than the screen off time, then something (maybe facebook) is keeping the phone awake even with the screen off, causing extra battery drain.
And 83% charge is pretty good, maybe even 75% might be better, I think from 0 to 75 it's like .3 or .4 wear but it's like with these batteries once you start going over 75% it jumps in wear dramatically. And if the phone is off (turned off completely you mean?) then the battery won't gain any wear because it won't be in use at all.
Click to expand...
Click to collapse
I noticed that I didn't make all the screenshots, but now I've just done them with regards to this new discharge cycle and you have the deep sleep statistics for a better analysis - they are in attachments.
I asked here for a longer battery lasting and instead I set it as 75% as the maximum percentage value of charge that reduces my autonomy but saves the battery.
However, yesterday I noticed that the charging wasn't deactivated when the phone reached 80% of charge (is the value that was set yesterday). Oughtn't Accubattery deactivate the charging?
The statistics you mentioned in your previous post appear to me a bit awkward even though they are related to many sessions in the last 7 days.
I use my phone with my phone case-battery (Newdery manufacturer) and until few months ago it could charge the phone up to about 80 % when I couldn't charge my phone through its charger. I need the charge to last a day, almost 20 hrs…
I noticed that the phone started to wear - the last few months - when I noticed that I couldn't have the phone working till the late evening and I tried to charge it fully before I left my house...
However, it is clear what I need for my use and habits, thus, new reliable battery-case suggestions would be a good hint for me...
In the end, I don't know what to do about apps that manage the apps freezing because I don't know how Android allows it and if it is worth it..