Related
Ok, so I've been reading a lot about how people are experiencing battery drain on their TF tablet and TF dock. I wasn't experiencing any battery drain overnight until I installed a bunch of apps and played with many settings. So recently, I would see my tablet go from 80% battery to ~60% battery while I slept (around 10 hours of being turned off).
I checked on the Asus Weather widget and it was set to refresh every 4 hours. I turned that off and set it to refresh only manually. Now my battery goes from 91% to 91% (after 10 hours). I've tested this two nights in a row now so I think I've fixed my battery drain issues. Anyone else experience these results?
Other settings I have:
Wi-Fi sleep policy set to turn off when screen turns off.
Does no one have this issue with the Asus Weather Widget? Does no one care about battery drain?
Dear ScubaSteveo
I have such query also, last night 95% before standby with the wifi sleeping, however, when I woke up and checked only left 72% within 9 hours.
So, I untick the Asus weather auto update and changed to manual also.
I will actually switch off the wifi before sleep tonight to test.
I upgraded to 3.2 just two days before, so I don't know much about the wifi problem and battery problem.
But I am quite sure only wifi could cause such battery draining.
It may be not the Asus weather causing the problem, maybe the setting of "screen off with wifi sleeping" actually doesn't sleep the wifi.
I have heard a lot 3.2 with a lot wifi and battery problems...hope Asus finds out and solve the problems.
I still think it's the Asus Weather Widget because as soon as I turned off the refresh setting and changed it to Manual refresh, I stopped seeing the battery drain.
Let me know if you see your battery do better after switching to manual.
I saw a similar improvement when switching from the 4 hr default to manual. I tested it last night and saw 10% drop in dock battery in ~10hrs, where before it was about 2-3% / hour.
B50 tablet and dock, 3.2 stock, battery saving mode test does not work
chupig said:
But I am quite sure only wifi could cause such battery draining.
It may be not the Asus weather causing the problem, maybe the setting of "screen off with wifi sleeping" actually doesn't sleep the wifi.
I have heard a lot 3.2 with a lot wifi and battery problems...hope Asus finds out and solve the problems.
Click to expand...
Click to collapse
I now have to agree with you. I've tested the Asus Weather Widget (still on manual refresh) with Wi-Fi sleep policy set to turn off when the screen turns off, and I have around 3% battery drain per hour. Apparently I have had Airplane mode on for a while so WiFi was not activated while I was sleeping.
This is not good.
So why the heck is the Wi-Fi not sleeping when it is supposed to??
Anyone else get stupid fast drain while its sleeping? I have wifi sleep policy set to turn off wifi when screen is off, and using the task manager nothing looks to be running that i havent launched myself. But usually i'd have the battery last DAYS and DAYS if i wasn't using it that much, but the last few charge cycles it's been nearly dead at the end of the day. Is there an app I can get to monitor stuff while its sleeping to see if something is keeping it from deep sleep? I can't remember what i've installed recently that could keep it in wake-lock or whatever. Thanks guys.
There's a build in feature in the settings menu to tell you what uses battery
Check that the wifi is actually sleeping when the screen is off. Tap the power button to wake up the tablet then look at the notification bar in the right hand corner to see if the wifi is turning on and connecting. If its not doing that then I dont think the wifi is disconnecting and turning off when the screen is turned off.
For battery issues, two "must have" tools are "better battery stats" and "cpu spy"
gary's right. download better battery stats here:
https://market.android.com/details?id=com.asksven.betterbatterystats
and since the developer of that app loves XDA, there's a free version for us!
OP: http://forum.xda-developers.com/showthread.php?t=1179809
DL: http://forum.xda-developers.com/attachment.php?attachmentid=833619&d=1325149176
Look into the partial wakelock and find the cuplrit!
Battery Drain
Try loading the free util Auto Airplane Mode which has helped fix the SOD issue and the related battery drain during the SOD.
Sorry to push the old post up again.
Recently im suffering from the weird battery drain, i didnt play/use my phone much on sunday , the idle battery drain is huge. like 8 hrs from 100%-40%.
I've installed both betterbatterystats and cpu spy already.
From battstats , it shows that kworker/0:1-3 and kworker/u:12-13 etc using up most of the batt , secondly is the doubletwist music player.
From cpu spy, most of the time is with 200mhz even i didnt use the phone at all, rarely goes to deep sleep mode.
for the process kworker it didnt show whats the process/app is about , anyone else know wt to do now ?
Same problem here :-(
Fully loaded at 7 o'clock and now I'm 34% - this really sucks!
faygo6464 said:
Sorry to push the old post up again.
Recently im suffering from the weird battery drain, i didnt play/use my phone much on sunday , the idle battery drain is huge. like 8 hrs from 100%-40%.
I've installed both betterbatterystats and cpu spy already.
From battstats , it shows that kworker/0:1-3 and kworker/u:12-13 etc using up most of the batt , secondly is the doubletwist music player.
From cpu spy, most of the time is with 200mhz even i didnt use the phone at all, rarely goes to deep sleep mode.
for the process kworker it didnt show whats the process/app is about , anyone else know wt to do now ?
Click to expand...
Click to collapse
All you can do is to check the apps you recently installed or updated. They might lock you from sleep. No easy way to control this
For me it was the "samsung-keyboard" - I froze it and now everything seems normal.
Hi all,
First time poster here, so hello! I've searched the forums and google but could not find an answer to this question.
Is anyone running a Nexus S on 4.0.4 ICS seeing lots of CPU usage at the 1000MHz frequency?
My phone is a Nexus S (i9020)
Operator: 02 UK
OS: Ice Cream Sandwich 4.0.4
Not rooted.
My phone goes into a deep sleep fine and battery usage seems to be little in this state. However, the moment I turn on the screen and start 'using' the phone, I see a battery drop of at least 1% every 5 mins or so. I'm not doing anything taxing, either scrolling through the home screens, or opening browser to read a web page for a few mins.
Higest three battery users are reported as:
Screen 37%
Android System 15%
Browser 7%
CPU Spy reports the following:
1000 MHz - 25.11 (30%)
800 MHz - 7.35 (9%)
400 MHz -3.34 (4%)
200 MHz - 6.26 (7%)
100 MHz - 6.56 (8%)
Deep Sleep - 33.29 (40%)
Total time: 1h23m13s
From what I've read cpu usage shouldn't max out unless you're running something intensive i.e. it shouldn't be at the 1000MHz frequency, when just reading an already loaded page.
I'm able to go from 100% to 50% in about 2 hours, just using the browser (on wifi) to read webpages and nothing more.
When I first got the phone, a year ago, on Gingerbread, I'd be able to watch 1 hour of video, send calls and texts and make it from 8.30am to 5pm using around 40% battery. These days, I don't get close to that at all.
Noted to moderators: if this is posted in the wrong place or would be better suited in an existing thread, I'm sorry please let me know and I'll edit as required!
Thanks in advance for your time and assistance!
Screen drains most the battery. If there is drain while it's off there would be some kind of wake lock preventing sleep. You likely don't have this since it seems your phone sleeps nicely, assuming you had the screen on for moat the time in that screenshot.
The frequencies you show seem a little skewed to 1000mhz for web browsing. What cpu governor are you using, and what settings? I usually get around 40-40 between highest and lowest frequency with ondemand, 20% or less for the intermediate frequencies. This is while web browsing most of the time.
Harbb said:
Screen drains most the battery. If there is drain while it's off there would be some kind of wake lock preventing sleep. You likely don't have this since it seems your phone sleeps nicely, assuming you had the screen on for moat the time in that screenshot.
The frequencies you show seem a little skewed to 1000mhz for web browsing. What cpu governor are you using, and what settings? I usually get around 40-40 between highest and lowest frequency with ondemand, 20% or less for the intermediate frequencies. This is while web browsing most of the time.
Click to expand...
Click to collapse
I understand the screen drains the most battery, but I feel there is an underlying issue since light usage (like reading) can drain 50% in 2 hours, whereas before I could watch 1 hour video and lose about 10%.
I'm not sure what you mean by CPU governor and settings. I'm running the stock ICS 4.0.4 (got the OTA only a few days ago). I agree it seems skewed. It seems to use the 1000MHz frequency pretty much all the time the screen is on.
chillerz said:
I understand the screen drains the most battery, but I feel there is an underlying issue since light usage (like reading) can drain 50% in 2 hours, whereas before I could watch 1 hour video and lose about 10%.
I'm not sure what you mean by CPU governor and settings. I'm running the stock ICS 4.0.4 (got the OTA only a few days ago). I agree it seems skewed. It seems to use the 1000MHz frequency pretty much all the time the screen is on.
Click to expand...
Click to collapse
First off, welcome to XDA!
The fact that you're not rooted + stock could only mean that there is probably a background app running while your actively using your phone. Have you checked into Settings > Apps > Running and noticed anything peculiar? For a fact, based on everything I'm reading here there is no way your phone should be at 1000 MHz for 30% of the time. At most for my usage, my phone is in the 1000 MHz state < 10% of the time.
If all else fails, you could always try doing a factory reset and seeing if the problem persists. If not then you can install your important apps one by one to find a culprit.
You could also try out this nify tool: BetterBatteryStats to give you more statistics as to what is eating your battery.
http://forum.xda-developers.com/showthread.php?t=1179809
10 percent drain while watching a video is hard to believe.
That would equal 10hrs to drain the battery with screen on watching a video. Which is not happening.
Your battery drain now sounds normal. Maybe in the past it was not reporting it correctly or you're simply mistaken somehow.
The average battery should last along the lines of 4 - 5 hours worth of screen on time. Whether this is playing a game or browsing around hasn't made more than that much difference for me. 1% every 5 minutes would give you ~8 hours of screen on time, a feat very few (aLNG, looking at you) have been able to do without an extended battery. Anything more than this is not going to happen while maintaining a cell signal and watching videos. You may have been exaggerating the time on battery in the past.
Go to Settings --> Developer options --> Show CPU usage and tick it. Leave the phone sitting there with the screen on for a bit and let me know what the top CPU users are.
Which settings are the best for battery lfe? I have stock everything.
Harbb said:
The average battery should last along the lines of 4 - 5 hours worth of screen on time. Whether this is playing a game or browsing around hasn't made more than that much difference for me. 1% every 5 minutes would give you ~8 hours of screen on time, a feat very few (aLNG, looking at you) have been able to do without an extended battery. Anything more than this is not going to happen while maintaining a cell signal and watching videos. You may have been exaggerating the time on battery in the past.
Go to Settings --> Developer options --> Show CPU usage and tick it. Leave the phone sitting there with the screen on for a bit and let me know what the top CPU users are.
Click to expand...
Click to collapse
The list of things using the CPU changes quite often, here's the list of the ones that are at the top of the list for a while (I've also attached a screenshot):
system_server
com.android.systemui
surfaceflinger
com.jim2
kworker/u:1
kworker/0:0
dhd_dpc
wpa_supplicant
UPDATE:
7h 48m 34s on battery
Voice calls: 1h 39m (screen is off for most of the call duration)
Screen on: 1h 23m
Used browser and xda app for less than 5 mins each.
Haven't done much else with the phone and I'm on 44% battery (from full charge).
CPU Spy (measuring whilst phone was charging overnight, so deep sleep is high):
Total CPU time = 13h26m
1000 MHz = 40 mins (5%)
800 MHz = 17 mins (2%)
400 MHz = 12 mins (1%)
200 MHz = 26 mins (3%)
100 MHz = 56 mins (7%)
Deep Sleep = 10h52m (80%)
hi,
I can confirm chillerz's notice. My experience's similar. Last week I upgraded my (non routed) i9023 from GB via OTA (before the update I did a hardreset). My phone became a cityphone I always have to keep a charger in my pocket and looking for power connectors.. with GB I could use my phone at least 2 days but now I'm happy if I can survive my workday.. my best was 13h - in that case Android OS battery usage was 61%.. I still haven't try to use the music player.. but I don't see any sense to it.. I'm also interested in a thread which could help me out and I've found my self here.. what do you recommend? what to do? replacing my 7 months old phone?? I've jus loved my nexus and here I'm.. It won't be a good business strategy in long term..
I know about the issues of released ICS in December.. I was hopping the 4.0.4 will solve them.. now it's April.. I don't want to wait 4 more months again..
thanks in advanced for your helping!
I had horrible battery life after the 4.0.4 update, but it's been much improved after fully discharging the battery and then charging it to 100% with the phone powered off.
great news, I will try tonight and share the result!
thx
The latest usage results seem good and processes also seem standard. Phone calls tend to use a fair bit of battery, keeping and transmitting a constant signal, powering speakers, keeping the entire phone awake and so on. I wouldn't put it above the screen being on, so you should be able to squeeze another ~30 minutes before 44% in normal use but this depends on too many factors to list anyway and bad reception can make it all the more difficult to figure out.
Also, while making calls don't be surprised if the CPU does decide it needs to ramp up to a higher frequency (ondemand likes 1000mhz) but i havn't put this to the test. This could skew the results as in the OP.
hello futangclan,
since your solution the battery usage "normalized" 26h/17%. This workaround would be a great tip on a welcome srceen at the first boot of ICS
before the fully discharging battery I noticed the battery usage of Android OS decreased from 60 to 19%.. I'm thinking about whether the ICS does something "maintenance" in the background after the OTA upgrade the first days or not..
Once upon a time, I too was one of the sullied - one those unfortunates souls, plagued with poor battery life on a Nexus S (stock FTW), brought on by an innocent (and joyful) upgrade to ICS 4.0.4 from 2.3.6.
When I first discovered the trouble, with great gusto, I ran to the interwebs and dutifully followed suggestions of restarting the phone or draining the battery, but alas - it was all to no avail. There is, however, a happy ending to this story. With effort and perseverance, I've since significantly improved performance. Here is my brief tale of success.
After the upgrade, Android (praise be its name!) decided to start, in the background, every single application on the phone. Verily Snake '97 was indeed running all the time. The horror!!! The game is entertaining certainly, but hardly worth keeping alive at the cost of other, more critical apps.
I was not deterred and took matters into my own hands. Using Manage Apps -> All (not Manage Apps -> Running, mind you), I went about Force Stopping each application (including some Android core apps). It was tedious and frightening. I was very careful and hesitant, as you should be if you are affected by a similar malady.
By the next day, I saw much improved battery life (hooray!), yet I wasn't free and clear. The hold of evil had not been loosened completely.
I found within, a strange and dangerous lock (wakelock - was that its name?) keeping the Gallery in the list of active applications, even when I had not used it for some time. It refused to move to the cached apps list. Puzzled, I scratched my empty head. The interwebs were of no use this time - I was on my own.
(cue ominous music)
Peering within, in the Sync section I found the system was trying to sync photos on an account where the checkbox for syncing was not selected.
A quick off-on-off stopped the syncing. The app slinked off the Running apps list. Soon, I was overjoyed, for I was experiencing improved battery life!
I've now returned to performance much closer to that from days of 2.3.6. My Nexus S' battery now reaches 40%-30% in ~16 hours, with always-on 3G, Wifi and GPS, oft use of phone, contacts, messaging, whatsapp, twitter, foursquare and browser, and infrequent use of music, market, maps, camera and rarer usage of games like Angry Birds (which consumes vast amounts of battery) and gallery.
All is well with the universe.
Certainly, this tale may or may not be a mirror to your own. Should you be experiencing similar problems, I hope my tale brings you solace, and provides a means to the end of your troubles.
demarcolister said:
Once upon a time, I too was one of the sullied - one those unfortunates souls, plagued with poor battery life on a Nexus S (stock FTW), brought on by an innocent (and joyful) upgrade to ICS 4.0.4 from 2.3.6.
When I first discovered the trouble, with great gusto, I ran to the interwebs and dutifully followed suggestions of restarting the phone or draining the battery, but alas - it was all to no avail. There is, however, a happy ending to this story. With effort and perseverance, I've since significantly improved performance. Here is my brief tale of success.
After the upgrade, Android (praise be its name!) decided to start, in the background, every single application on the phone. Verily Snake '97 was indeed running all the time. The horror!!! The game is entertaining certainly, but hardly worth keeping alive at the cost of other, more critical apps.
I was not deterred and took matters into my own hands. Using Manage Apps -> All (not Manage Apps -> Running, mind you), I went about Force Stopping each application (including some Android core apps). It was tedious and frightening. I was very careful and hesitant, as you should be if you are affected by a similar malady.
By the next day, I saw much improved battery life (hooray!), yet I wasn't free and clear. The hold of evil had not been loosened completely.
I found within, a strange and dangerous lock (wakelock - was that its name?) keeping the Gallery in the list of active applications, even when I had not used it for some time. It refused to move to the cached apps list. Puzzled, I scratched my empty head. The interwebs were of no use this time - I was on my own.
(cue ominous music)
Peering within, in the Sync section I found the system was trying to sync photos on an account where the checkbox for syncing was not selected.
A quick off-on-off stopped the syncing. The app slinked off the Running apps list. Soon, I was overjoyed, for I was experiencing improved battery life!
I've now returned to performance much closer to that from days of 2.3.6. My Nexus S' battery now reaches 40%-30% in ~16 hours, with always-on 3G, Wifi and GPS, oft use of phone, contacts, messaging, whatsapp, twitter, foursquare and browser, and infrequent use of music, market, maps, camera and rarer usage of games like Angry Birds (which consumes vast amounts of battery) and gallery.
All is well with the universe.
Certainly, this tale may or may not be a mirror to your own. Should you be experiencing similar problems, I hope my tale brings you solace, and provides a means to the end of your troubles.
Click to expand...
Click to collapse
You, my friend, deserve a cookie for such good writing.
@demarcolister Awesome first post here on XDA.
Great story too. Most will blame battery drain on the custom ROM/kernel they flash and fail to realize their battery drain is usually caused by a rogue app running in the background ...
I've never had good luck with the stock gallery app. I always freeze it via adb when I flash a new ROM. It seems much worse in ICS. It would always start back up.
Stock GB gallery was an absolute joke. Slow, missing thumbnails, weird background and hard to see what you're scrolling through. The stock ICS gallery i actually prefer over alternatives. Though i don't use picasa so that is disabled. Never an issue with it (besides always showing my damned album covers).
Harbb said:
You, my friend, deserve a cookie for such good writing.
Click to expand...
Click to collapse
nom nom nom!!
AeroEchelon said:
@demarcolister Awesome first post here on XDA.
Great story too. Most will blame battery drain on the custom ROM/kernel they flash and fail to realize their battery drain is usually caused by a rogue app running in the background ...
Click to expand...
Click to collapse
I was quick to (negative) judgement too, but I figured that Google would not (certainly!) release an update that completely cripples a modern and high-selling device.
Harbb said:
Stock GB gallery was an absolute joke. Slow, missing thumbnails, weird background and hard to see what you're scrolling through. The stock ICS gallery i actually prefer over alternatives. Though i don't use picasa so that is disabled. Never an issue with it (besides always showing my damned album covers).
Click to expand...
Click to collapse
Agreed! In fact, I'd accept, grudgingly, if album covers show up in the gallery (although, truly they should not), but I do not, under any circumstance, want to see the icons (tick for yes, cross for no, i for icons, etc.) used by an application in my Gallery. Idiocy!
What is the solution? I wish to remain Stock, so rooting and editing the equivalent of plist or config files is not an option. At least 'Camera' is the first option, always! That makes it usable, but as soon as I use picplz or camera360 or instagram their folders get shuffled in position. Is Google hinting at something!? *sigh*
Hey guys...
Sent from my Nexus S
Executive summary = You always want "Keep Wifi on During Sleep" set to "Always" if you care about your battery life.
In post #17 in the "P6210 - Huge Battery Drain on ICS" thread iosandroid found that setting "Settings->Wifi->Menu->Advanced->Keep Wifi on During Sleep" to "Never" caused battery drain. Since I feel this is big bug and my mom told me I'm special I thought I'd start a new thread with some more details on this problem, a more descriptive thread title to highlight this issue and a few questions of my own.
I have a Samsung Galaxy Tab 7.0 Plus (aka GT-P6210) WiFi only tablet that had HC (Honeycomb) when I first got it. To save battery I changed "Settings->Wifi->Menu->Advanced->Keep Wifi on During Sleep" to "Never" (actually think the wording was a little different back in the HC days, but you get the idea). I'm not sure if/how much this helped, but it didn't hurt my battery life.
Shortly after upgrading to ICS (Ice Cream Sandwich) I noticed my battery life was worse. Apparently I wasn't alone since "iosandroid" (see above) had the same problem and solution. That is, if you set Settings->Wifi->Menu->Advanced->Keep Wifi on During Sleep" to "Never" or "Only when plugged in" your better drains much faster when you're tablet is idle. How much faster? In my tests setting this to "Never" drained my battery by 3.10%/hour. If I leave this at its ICS default of "Always" my battery only drains at 0.27%/hour, OVER 10 TIMES BETTER (idle) BATTERY LIFE! See the bottom of this post for a listing of my battery drain tests.
By using "CPU Spy" I could see that with "Keep Wifi on During Sleep" set to "Never" my tablet would never go into deep sleep, but with it set to "Always" my tablet would spend almost all of its time in deep sleep. GSam Battery Monitor showed that "Kernel (Android OS)" was using up most of my battery when this problem is occurring.
This problem isn't limited to ICS, I also got the same results with JB (Jelly Bean). Specifically I used "AOKP Jelly Bean Milestone 1". With stock ICS the default setting is "Always", so only people that mess with their advanced settings will be affected by this. Note that I believe that an OTA upgrade from HC to ICS will retain your previous settings for this. In JB (at least AOKP JB), this problem will have a much wider reach since "Keep Wifi on During Sleep" defaults to "Never".
Now on to my questions:
-Does anyone know the scope of this bug? Does it only affect the P6210, or Samsung devices, or every Android device? iosandroid reported having the same problem with his phone.
-Do I have to open a tech support case with Samsung to report this bug, or is there a better way?
[Battery Drain Tests]
VERSION Keep Wifi on During Sleep? DRAIN RATE
----------------------------------------------------------------------------------------------
HC Always 1.00%/hour (lost 2% total over 2 hours)
HC Never 0.50%/hour (lost 1% total over 2 hours)
ICS Always 0.27%/hour (lost 2% total over 7.5 hours)
ICS Never 3.10%/hour (lost 24% total over 7.75 hours)
JB Always 1.0%/hour (lost 1% total over 1 hour)
JB Never 3.52%/hour (lost 81% total over 23 hours)
-Legend
--HC = Stock Honeycomb (Android 3.2)
--ICS = Stock Ice Cream Sandwich (Android 4.0.4)
--JB = AOKP Jelly Bean Milestone 1 (Android 4.1.2)
-Setting "Keep Wifi on During Sleep?" to "Only when plugged in" behaves the same as "Never" (i.e. it has same battery drain problem)
-Yes, I know my testing time periods vary wildly, but I'm too impatient to wait a day for each of the tests. For example I'm sure JB's "Always On" loss rate is much closer to ICS's.
All I can say or add to this my tenderloin HP touch pad running cm is the same keep wifi on always drains the battery slower than never.
IMO, it would be because of 3G activating when the wifi turn off during sleep.
Try doing your test in Airplane mode to isolate the activation of the Phone radio and stick only to WIFI during your comparison test.
EDIT: ooops! sorry, it just occured to me that you've got a P6210 and not a P6200. My bad.
Airplane mode uses more battery than WiFi always on
viper001 said:
Try doing your test in Airplane mode
Click to expand...
Click to collapse
Yup, my tab is WiFi only. However I did actually test it in airplane mode and found that the battery lost 0.40%/hour (lost 11% total over 27 hours) with airplane mode enabled. This is still worse than the 0.27%/hour you lose when you just leave WiFi on (Keep Wifi on During Sleep? set to Always). This airplane mode battery drain was also unexpected to me, but in googling it seems like this is a common problem.
One last test I did was to manually turn the WiFi off. When I did that the battery only drained at a rate of 0.11%/hour (lost 1% total over 9.5 hours). I should test that longer to get a more precise number, but my short test was good enough to show that manually turning WiFi off does actually save power (it's about time something worked as I expected it to .
My next planned test it to use something like AutomateIt to automatically turn off the WiFi after the screen turns off to see if I can automate the WiFi battery savings.
My GT-P6210 also has the same issue after installing Elements HD rom. I never had this issue even after upgrading from honeycomb to ICS stock.i
jim-j said:
Yup, my tab is WiFi only. However I did actually test it in airplane mode and found that the battery lost 0.40%/hour (lost 11% total over 27 hours) with airplane mode enabled. This is still worse than the 0.27%/hour you lose when you just leave WiFi on (Keep Wifi on During Sleep? set to Always). This airplane mode battery drain was also unexpected to me, but in googling it seems like this is a common problem.
One last test I did was to manually turn the WiFi off. When I did that the battery only drained at a rate of 0.11%/hour (lost 1% total over 9.5 hours). I should test that longer to get a more precise number, but my short test was good enough to show that manually turning WiFi off does actually save power (it's about time something worked as I expected it to .
My next planned test it to use something like AutomateIt to automatically turn off the WiFi after the screen turns off to see if I can automate the WiFi battery savings.
Click to expand...
Click to collapse
If you know how, try looking into the build.prop. you'll find that stock wifi. supplicant_scan_interval=15. try a higher number like 90 or 180. this basically lengthens the time for wifi network searches from 15 secs to 90 or 180 seconds respectively.
As Krusty the Clown says, "it's not just good--it's good enough"
viper001 said:
If you know how, try looking into the build.prop. you'll find that stock wifi. supplicant_scan_interval=15. try a higher number like 90 or 180. this basically lengthens the time for wifi network searches from 15 secs to 90 or 180 seconds respectively.
Click to expand...
Click to collapse
I could probably figure out how to change that, but I've decided that just leaving WiFi on all the time gives me good enough battery life. I enjoy troubleshooting these types of technical problems, but unfortunately I must return to debugging my three year old daughter's Dravet Syndrome. Her cognition is deteriorating, so I'm hoping to find a solution or workaround soon. If any of the multimillionaires that read this forum want to fund a cure for Dravet Syndrome, head on over to dravet.org or dravetfoundation.org
I've got this issue on a Chinese Tablet running JB 4.1.1. After some investigation the conclusion I've reached is that the settings are mislabled on the GUI. "Always" results in disconnection from the SSID 15 minutes into sleep (although WIFI is still 'ON'). "Never" keeps WIFI on and connected indefinitely, and if autosync is also on you'll get lots of wake-locks and reduced standby battery life, particularly if you have location reporting on and google maps installed.
neu - smurph said:
I've got this issue on a Chinese Tablet running JB 4.1.1. After some investigation the conclusion I've reached is that the settings are mislabled on the GUI. "Always" results in disconnection from the SSID 15 minutes into sleep (although WIFI is still 'ON'). "Never" keeps WIFI on and connected indefinitely, and if autosync is also on you'll get lots of wake-locks and reduced standby battery life, particularly if you have location reporting on and google maps installed.
Click to expand...
Click to collapse
Interesting results, but that wasn't my experience. For example with WiFi always on my tablet does stay connected to the network all the time. All of these weird issues is about enough to make you want to buy an iPad.
I just got an LG V20 which is good on battery when in use but sucks when not in use. The culprit is always wifi. I just discovered the root cause is Location services that is using wifi to get locations even when wifi is off.
To stop this, go to settings->location->scanning.
Uncheck wifi scanning. For good measure, uncheck bluetooth scanning.
Go to wifi menu ->advanced-> keep wifi on when screen is off
Change to never or "only when plugged in"
Hi,
thanks for your helpful tips..
So out of the 3 tips you have:
1. Uncheck wifi scanning
2. Uncheck bluetooth scanning
3. Turn wifi off when screen is off
Any idea how much does each option save (if you've quantified)?
I'm happy to follow points 1 and 2. I'd only do 3 if it really helps a lot, because most apps would use data if wifi isn't available to periodically phone home.
I have always been dissappointed with my V20 standby time.. I had all of these settings on.. so i'll see how she does now they are off.
Thanks!
My standby time is from 0-4% over 8-9hrs. I really cant complain.... but the phone is facing down.
I wasn't aware of the wifi location scanning, and the bluetooth scanning. Giving it a try as my standby time has been horrible lately.
I am also facing severe battery drain on my LG V20. Battery easily drains by 5-10% per hour even when the phone is lying idle with screen off. Major culprits are 'Phone Idle', 'Android System' and 'Android OS'.
coolravsun said:
I am also facing severe battery drain on my LG V20. Battery easily drains by 5-10% per hour even when the phone is lying idle with screen off. Major culprits are 'Phone Idle', 'Android System' and 'Android OS'.
Click to expand...
Click to collapse
Try what is mentioned here
Post your screen shots here and tag or quote this post
As a side note, I've found that using wifi and cell data to help location services causes maps to scan these options and slow down (maps keeps saying every 5 to 15 seconds "searching"). By using gps only, the maps app is faster and less battery drain.
Obviously if you are indoors you need the help of wifi or cell data. But in the car or outside it is unnessary.
Thanks for your tips it's very good for my life battery. :good:
One Twelve said:
Try what is mentioned here
Post your screen shots here and tag or quote this post
Click to expand...
Click to collapse
I tried as suggested in the post you shared. Once the Bugreport was generated, I got a notification to click it to share. But, upon clicking nothing happened. I did not get anything (no pop-up, no options) further to share it. I tried thrice but, every time same end result.
How can I access the Bugreports generated on the phone?
coolravsun said:
I tried as suggested in the post you shared. Once the Bugreport was generated, I got a notification to click it to share. But, upon clicking nothing happened. I did not get anything (no pop-up, no options) further to share it. I tried thrice but, every time same end result.
How can I access the Bugreports generated on the phone?
Click to expand...
Click to collapse
Ah, seems like the obvious question but you can't.
I've found the most reliable way is to email them and then download them
One Twelve said:
Ah, seems like the obvious question but you can't.
I've found the most reliable way is to email them and then download them
Click to expand...
Click to collapse
Finally! I was able to share and download the bug report. I am attaching the Historian Graph and Aggregated Stats screenshots here. Please let me know what you find.
coolravsun said:
Finally! I was able to share and download the bug report. I am attaching the Historian Graph and Aggregated Stats screenshots here. Please let me know what you find.
Click to expand...
Click to collapse
- see the cpu running, userspace wakelock & screen on lines. They seem to match. Screen is on, cpu working with userspace wakelock. Close to 7pm the screen is off but the cpu is running, because you were listening to audio. I don't see a problem here. Looks normal
- you screen off discharge rate is 2.56%/h which seems a bit high. If you were streaming audio this might add to it. Do you have the second screen on when the main screen is off ?
- somewhere around 12pm you are using data for about an hour. Mobile Signal strength isn't very good, mostly yellow. What i don't understand is why your wifi is also on ? and this is in an area where wifi signal is bad. Both of these will add to drain. And in two hours your battery dropped from 70 to 40
- little after 1pm you're on wifi for a couple of hours but the signal is weak
- around 5pm you're back on data streaming audio and battery takes a nose dive here. Down 30% in like an hour. Were you moving ?
- then you charge up to 85%, doze kicks in which is good, if there was app drain doze would not come on, for the next 5h without use, you lose about 5%
- the part i don't understand is between 1am & 6am, battery drops 10% yet full doze (blue) is on. So there is some activity going on there. What ? sync ? updates ?
Not sure about the aggregated stats as you've recharged up and run down fr a second cycle so it could be your off screen drain is twice as high because of that
charge up again, go through your day and save log when you're at 5% and lets see the two screenshots from just one charge cycle
One Twelve said:
- see the cpu running, userspace wakelock & screen on lines. They seem to match. Screen is on, cpu working with userspace wakelock. Close to 7pm the screen is off but the cpu is running, because you were listening to audio. I don't see a problem here. Looks normal
- you screen off discharge rate is 2.56%/h which seems a bit high. If you were streaming audio this might add to it. Do you have the second screen on when the main screen is off ?
- somewhere around 12pm you are using data for about an hour. Mobile Signal strength isn't very good, mostly yellow. What i don't understand is why your wifi is also on ? and this is in an area where wifi signal is bad. Both of these will add to drain. And in two hours your battery dropped from 70 to 40
- little after 1pm you're on wifi for a couple of hours but the signal is weak
- around 5pm you're back on data streaming audio and battery takes a nose dive here. Down 30% in like an hour. Were you moving ?
- then you charge up to 85%, doze kicks in which is good, if there was app drain doze would not come on, for the next 5h without use, you lose about 5%
- the part i don't understand is between 1am & 6am, battery drops 10% yet full doze (blue) is on. So there is some activity going on there. What ? sync ? updates ?
Not sure about the aggregated stats as you've recharged up and run down fr a second cycle so it could be your off screen drain is twice as high because of that
charge up again, go through your day and save log when you're at 5% and lets see the two screenshots from just one charge cycle
Click to expand...
Click to collapse
Thanks a lot! Please find my answers in sequence.
- I listen to music while going to work. But, that is, till 8:30 AM only. Yes, I have 2nd screen ON when the Main display is OFF.
- I watch stored videos during lunch (12-1pm) for around an hour but it shouldn't be using data as I am playing stored videos.
- Around 5 pm, I leave for home. Again while going home I listen to music for half an hour.
- I have no Idea of what is happening during Night because I just leave it and don't use it until morning. In fact, I have scheduled the 2nd screen to be off between 11 pm and 6 am
I will try to run a proper cycle as you have suggested and will recapture the logs.
I understand the battery dropping while I am using the phone (listening to music/watching videos/browsing/anything else). What I don't get is the battery dropping insanely when I am not using it. For example, once I reach the office, I stop the music, kill the music player and just keep the phone aside. After 1-2 hours, as I check my phone I find battery dropped by 10% or so! It's the battery drain while my phone is just lying idle that is troubling.
Also, I have noticed that once I charge my phone and then leave it (Not using it) the battery drain is minimal like 1% per hour. But, once I run some app (music/browsing etc) for a little while and then leave the phone, the idle battery drain is pretty high.
coolravsun said:
Thanks a lot! Please find my answers in sequence.
- I listen to music while going to work. But, that is, till 8:30 AM only. Yes, I have 2nd screen ON when the Main display is OFF.
- I watch stored videos during lunch (12-1pm) for around an hour but it shouldn't be using data as I am playing stored videos.
- Around 5 pm, I leave for home. Again while going home I listen to music for half an hour.
- I have no Idea of what is happening during Night because I just leave it and don't use it until morning. In fact, I have scheduled the 2nd screen to be off between 11 pm and 6 am
I will try to run a proper cycle as you have suggested and will recapture the logs.
I understand the battery dropping while I am using the phone (listening to music/watching videos/browsing/anything else). What I don't get is the battery dropping insanely when I am not using it. For example, once I reach the office, I stop the music, kill the music player and just keep the phone aside. After 1-2 hours, as I check my phone I find battery dropped by 10% or so! It's the battery drain while my phone is just lying idle that is troubling.
Also, I have noticed that once I charge my phone and then leave it (Not using it) the battery drain is minimal like 1% per hour. But, once I run some app (music/browsing etc) for a little while and then leave the phone, the idle battery drain is pretty high.
Click to expand...
Click to collapse
Same sequence
- When you have the second screen on, is the phone facing up or down. What i notice with that second screen is it ignores any brightness settings. If the phone is face up and pointed at a light, the second screen becomes very bright. If its facing away from the light then it dims. Depending on how your phone faces you will either have more or less drain here, without doing anything and phone just sitting there. Typical overhead with second screen on and normal brightness ie not too bright is around 1% per hour. This could be adding to your off screen drain. Why not try a couple of cycles. One with second screen off and another with second screen on. Just to see how your off screen drain rate is like.
You say you listen to music only upto 8:30AM, take a look at the audio line. Can you see audio triggering ? there's little blips there after 8:30AM which continues till 5:30PM where its solid. This is your ride back where you listen for an hour. The 5:30 audio is ok but the blips in between are not leaving aside lunch video. Each time there is an audio blip there is a wakelock. Pay attention to the duration of the audio blip, if its a few seconds it could just be notification, but if its longer, does it correspond to your use.
Now look at the top app line, try to find which apps are running when audio triggers. To do that hover over the top app line which coincides with audio when you were not listening to audio. You will see a popup screen with a list of apps. Or check History Stats - TopApplicationSummary for a table, screen shot that and post
Do you use a lot of widgets that update in the background ?
- something was using mobile data when you were watching stored videos at lunch. Take a look at the'mobile radio active' line and you see activity there around lunch. Your wifi however is off and not running. If there were any apps running they were using mobile data, this is extra drain
- take a look at the line that says 'foreground process'. it's pretty solid right through both your runs. The only time it stops is when you recharge. This is a hint something is up. If you hover above it what does the popup say ? try moving along the line and observe whether the information changes
There shouldn't a foreground process running when you're not using the phone. Maybe if you can screen shot, the table that displays under History Stats - Foreground Process Summary
Scroll down and under the graph and on the left you will see three headers with twisties, System stats, History stats & App Stats
Hold on to your bug report files and they will be useful to verify if any changes you make take effect or not
- 1% per hour corresponds to second screen on, with it off your drain would be halved. However having drain after leaving a music or browsing app isn't good. It means a wakelock was caused and its not releasing so doze can't kick in. So battery will drain. If the phone is shaking, say in your pocket as you walk around, full doze won't kick in either
Which social media apps do you use.
Stock launcher or other if so which
I've found just buying a new battery off of ebay for $10 is the the easiest way to gain back that extra hour of on screen time and extend stand by. That's why the phone was made with a removable battery. I have 3 of them and don't need to touch a charger for a week. and when the time comes to charge the batteries, just put them in the charging docks and done.