Strange battery usage behaviour - Nexus 7 (2013) Q&A

I have a strange issue with my 32G WiFi FLO that I was hoping the knowledgeable members of XDA could help me diagnose.
Since I got it at launch, it's been sucking the battery dry. But not consistently. I have no idea what or why, but here's what I know so far:
All details are with auto sync OFF. WiFi OFF on sleep, location services ON (but cannot use WiFi)
Not unlocked or rooted (stock)
- From boot, and for the first 20-40 hours after that, battery usage on standby averages out to around 0.13% per hour.
- After that, and for no reason I can discern, battery usage jumps to an average of 0.84% per hour, and keeps draining like this usually until I reboot or need to charge
- Stock battery app shows no apps draining, BBS shows no apps draining stuff or excessive wakelocks and indicates the tablet is spending most of its time in deep sleep.
- Life with screen usage seems to be around 7+ hours either way, so this is as expected.
- Sent to ASUS to diagnose & repair, received with note that front camera unit replaced and OS reloaded.
- Issue is still occurring after "repair"
- apps running at the time are usually Android Keyboard, Android Services, Settings. Sometimes Play Store, Currents (even though I don't use it and have never launched it), Google Play Services as well. These are the only apps that run regardless of state of battery drain.
Can anyone think of any reason this is occurring, or where else I can go to check for more info? I'd prefer to stay stock/unrooted.
I'm looking to send it back for RMA *again*, but I'd rather tell them where to look than try and trust that they'll know where to look to fix it this time.

Guess no-one else has this issue or any ideas on where to look for this, since there are no replies

Related

[Q] High "Awake" vs "Screen On" time

Let me preface this by saying I'm not complaning about battery life as 36h is very good. That said, I feel like my phone is awake much longer that it should be. Anyone have any ideas why my Awake time is so much higher than my Screen-on time?
Once again, I'm not complaining but considering my phone was awake almost 5x longer than the screen was on, I feel like I could squeeze some more life out of the phone. I had 1 exchange account @ 15min, 1 gmail on push, no talk/g+, ~2-3 hours off wifi (4g), gps on, bluetooth off, 4.0.4, leanKernel.
When analyzing the wakelocks, I don't see anything that would explain almost 6 hours of extra awake time:
Considering most of this charge I was on wifi, I think I should have been able to achieve more than 1.5h screen-on time. Especially when I see people getting 4-5+ hours on theirs. What could be causing this seemingly excess awake time?
Since those screen shots, I've done another full cycle and here are my results. Same settings as before. It looks as if I did a bit better with the ratio of awake vs screen on, but I still only got ~20 hours. I'll admit, this had much more 4g time and heavier usage.
As you can see it's better, as it was only awake about 3x as much as the screen. You can see where I was at home in the second screenshot (The long bar of wi-fi) and that included me sleeping yet it shows that the phone was consistantly waking up overnight without any usage. Short of "email", I'm not sure what could be causing it. I got MAYBE 3 e-mails overnight.
Signed out of talk/g+/latitude
Location services was NOT disabled in either set of screenshots. Disabled it and charging now. Maybe that will help?
Have you checked out your wakelocks using BetterBatteryStats (found here on XDA)? Also, download CPU Spy from the market and check how long your phone is in what state. If it isn't in deep sleep too often, you might have an app or service keeping your phone awake. Background Data of any kind usually does that. Also, the first culprit I would investigate is Google Maps. Uninstall that bad boy and test your phone out. I am betting you that 60% of the time, the problem with your phone being awake too often is with Maps running unnecessarily in the background. And to be clear, Maps self-restarts itself even after logging out of Latitude and closing the app completely
armanatz said:
Have you checked out your wakelocks using BetterBatteryStats (found here on XDA)? Also, download CPU Spy from the market and check how long your phone is in what state. If it isn't in deep sleep too often, you might have an app or service keeping your phone awake. Background Data of any kind usually does that. Also, the first culprit I would investigate is Google Maps. Uninstall that bad boy and test your phone out. I am betting you that 60% of the time, the problem with your phone being awake too often is with Maps running unnecessarily in the background. And to be clear, Maps self-restarts itself even after logging out of Latitude and closing the app completely
Click to expand...
Click to collapse
I have attached all the wakelocks to the previous two posts. I didn't attach CPU spy but I did check it every time. Usually it's between 60-80% but most often it's >70% in deep sleep.
Just did a fresh wipe with a app restore using the market. Location services have been disabled. I have uninstalled all gMaps updates and disabled the app. Is this good enough? Should I convert to user and uninstall using TB?
Just wanted to chime in and say I'm seeing a very similar profile to what you posted. And I'm not entirely sure, but I think this started when I flashed this ROM. What I feel like I'm seeing is that active use of the phone seems to be more of a drain than it used to, but I'm not sure how much of that would be placebo (i.e. remembering when I first got the phone around the holidays and there were a lot of relaxed days at home with constant wifi).
But right now I'm seeing 5.5 hours of awake time and 1 hour of screen on time, with 27% remaining. Total time is 42 hours, which seems to round everything out to a decent battery life, but again, 1 hour of use for 70% of the battery seems lower than what I remember. Not sure if a vote for seeing the same behavior is one for this being normal or us both having the problem, but I can try to post screenshots/more detailed info later if it would help.
This is on the above linked rom with stock kernel, 4.0.4 radios.
That's the same ROM I'm using and I agree, 70% usage for 1h screen time seems too much. I've seen people get over 2.5h screen on time on pure 3/4g
I'm going to see if disabling maps and location services help. Will report back.
I would be interested to see any SS you have, might help.
Sent from my Galaxy Nexus using XDA App
This is after a fresh wipe, fresh kernel install, no maps, no g+, no gTalk, no GPS, no location services, just gmail and 1 exchange @ 15 minutes
Any advice as to what's going on would be very helpful. Thanks in advance.
I also have a problem with wake-locks.
Since phone is relatively new ~2weeks its still stock 4.0.2 GSM. After some time my battery life fell and thanks to XDA i think i found the problem Google backup.
I disabled Google backup to see if i get the same awake time tomorrow.
If the problem doesn't go away, is it possible to resolve this problem without factory reset of the phone?
Here are some screenshots I made the other day, taken a bit into a charge but immediately prior the phone was down to <6%. Didn't get a capture of the kernel wakelocks but as you reported, the screen on time falls far below the wake time, and the wakelocks don't seem to come anywhere near to explaining the difference.
I just installed the 6.3.0 google maps, which claims to increase battery performance for location and latitude services. I'll try to make a comparison next time my battery is drained.
I've signed out of latitude before but generally don't redo this upon rebooting the phone. Does it sign in by default on every reboot?
Well after disabling backup thing im still getting 90% wake time from backup service so i will try to do a factory reset over weekend and hope it goes away... Will post resoults in case some 1 else gets this problem.
JoeSyr said:
Here are some screenshots I made the other day, taken a bit into a charge but immediately prior the phone was down to <6%. Didn't get a capture of the kernel wakelocks but as you reported, the screen on time falls far below the wake time, and the wakelocks don't seem to come anywhere near to explaining the difference.
I just installed the 6.3.0 google maps, which claims to increase battery performance for location and latitude services. I'll try to make a comparison next time my battery is drained.
I've signed out of latitude before but generally don't redo this upon rebooting the phone. Does it sign in by default on every reboot?
Click to expand...
Click to collapse
This looks to me like some sort of Maps issue. Try to uninstall/disable maps and see if it goes away. Looks like it's stuck trying to locate you with maps somehow based on those wakelock names.
Catoss said:
Well after disabling backup thing im still getting 90% wake time from backup service so i will try to do a factory reset over weekend and hope it goes away... Will post resoults in case some 1 else gets this problem.
Click to expand...
Click to collapse
Hopefully the factory reset will fix it, that is an odd problem.
It seems to me like my problem was the version of leankernel I was using. I went from 10.0exp2 to 2.01exp2 and it's much much better
Actually, the kernel upgrade did not fix my problem. I did seem to figure out what was happening though.
This entire time I've noticed that my phone would standby and sleep very well on Wi-Fi but when I switched to data it seemed as if I would bleed juice. I discovered that my "Keep Wi-Fi on during sleep" was set to "always" and I believe that was causing my excess wakes.
I've changed it to "Never" and I'm doing some tests. I'll be sure to report back if anyone is watching this thread.
Timdor said:
Actually, the kernel upgrade did not fix my problem. I did seem to figure out what was happening though.
This entire time I've noticed that my phone would standby and sleep very well on Wi-Fi but when I switched to data it seemed as if I would bleed juice. I discovered that my "Keep Wi-Fi on during sleep" was set to "always" and I believe that was causing my excess wakes.
I've changed it to "Never" and I'm doing some tests. I'll be sure to report back if anyone is watching this thread.
Click to expand...
Click to collapse
mine is opposite of that, i standby fine on data but terribly on wifi. im guessing that is background syncing. i just have to figure out what is doing it
i have my wifi set to never too for better battery life. It seems counter intuitive, but wifi is better on power than 3g/4g. So preventing the phone from leaving wifi back to cellular is better for battery. All my phones have been like this.
yeah thats what i thought it does but mine drains faster on wifi...i leave it on cause i barely get signal in my room an if i sit on 3g it just takes a long time to do anything
What type of drain do you get over 3g vs wifi?
Yesterday I was playing around on 3g all day and I was seeing an average of 6%/hr. My phone is consistantly awake 20-25% of the time according to betterbatterstats. Screen on will always be far less than half of my awake time. Wifi drains around 1%/hr
I did a wipe of my 4.0.4 install and flashed a fresh kernel download. I'm not logging into exchange because, for some reason, I think that's my problem.
Also, changing to Never didn't really fix my issue.

[Q] Battery Life

I'm sure another battery life thread exist but the search function is not working for some odd reason.
Anyhow, I recently bought this device(32 GB) model on Ebay and it is a refurbished edition. I updated it to the latest 4.4.2 and the device is amazing. However, one issue that disappoints me is the battery life. It lasts around 5-6 hours if I'm constantly browsing the web and watching videos. To charge it, it takes a good 7 hours. I looked at the battery and noticed that Android OS was responsible for 56% of the battery drainage. I notice the back of tablet(near the camera) getting very hot when I was playing some games as well.
I'm really trying to push this things to the limits to check to see if it's faulty so I can return it before the 14 days is up. My questions are, what is the typical battery life you users experience and how long does it usually take you users to charge it? Also, my Android OS has never taken up that much battery---is this normal? If not, how can I fix it?
Thanks!
Streaming videos kills battery in general but that's still high battery usage for Android OS. I suggest you invest BetterBatteryStats from the play store and see if something else is causing your battery drain. Post some screen shots when you get the app. I
My Android OS battery utilization is sitting at 7% at the moment. I don't stream much data, and but I think high Android OS battery utilization has more to do with background data than video or music streaming anyway
Few things to improve battery life in general is to disable location reporting and location history in GPS menu. Better yet, but disable GPS in general. Turn off the setting in the advanced wifi menu that let's apps scan wifi even if it's off for location data. Google+ and hangouts are big drainers... Disable or unistall them is you can or at least don't let them sync data. Go to Google account setting and disable syncing of anything you don't needs.
Edit: I just stream 1.5hrs (1.3gb data) of Netflix and my Android OS battery usage didn't go up. It's gotta be a rogue process taking CPU cycles/checking location/sending lots of data. Install BBS and see what's causing it. More than 7hrs of screen time for me today and I still have 25% battery left.
@streetenigma23 http://forum.xda-developers.com/showthread.php?t=2742745
Usage = 10hrs
Charge Time = 4-5hrs.
Sent from Galaxy Note 10.1 2014 Edition via Tapatalk.
Thanks for the suggestions. I will go ahead and d/l that app and see how it goes. I'll put up some screenshots and try to see if we can get to the bottom of it.

[Q] Htc desire 601 battery drain

I need help!!!
I am running on android kit kat 4.4.2 (not rooted) Since last update Google play services keeps my phone awake even when phone is in sleep AND in safe mode. Like I said, I was using my phone in safe mode for twelve hours just to be sure that none of installed applications is not draining my battery. When I went to sleep last night battery was at 76% and after 6 hours battery was at 11%, when I checked battery history, wi-fi was off while phone is at sleep, "network signal" line was solid (as it suppose to be) and "keep awake" was solid blue also and it was running for 7 hours 16 minutes, straight (which is NOT suppose to be). And imagine my surprise when I saw GOOGLE PLAY SERVICES among running apps exact period of time!
It is obvious that Google play services drains battery. What can I do to prevent mentioned app to suck out life out of my battery and still to be able to use application that needs Google play services.
Thank you in advance.
I forgot to mention that I am dealing with this problem 15-20 days already and that I tried almost everything. Location is on gps only, wipe cash in recovery, remove battery, battery calibration, right now running in safe mode.........etc, etc, etc
mrzodrax said:
I need help!!!
I am running on android kit kat 4.4.2 (not rooted) Since last update Google play services keeps my phone awake even when phone is in sleep AND in safe mode. Like I said, I was using my phone in safe mode for twelve hours just to be sure that none of installed applications is not draining my battery. When I went to sleep last night battery was at 76% and after 6 hours battery was at 11%, when I checked battery history, wi-fi was off while phone is at sleep, "network signal" line was solid (as it suppose to be) and "keep awake" was solid blue also and it was running for 7 hours 16 minutes, straight (which is NOT suppose to be). And imagine my surprise when I saw GOOGLE PLAY SERVICES among running apps exact period of time!
It is obvious that Google play services drains battery. What can I do to prevent mentioned app to suck out life out of my battery and still to be able to use application that needs Google play services.
Thank you in advance.
I forgot to mention that I am dealing with this problem 15-20 days already and that I tried almost everything. Location is on gps only, wipe cash in recovery, remove battery, battery calibration, right now running in safe mode.........etc, etc, etc
Click to expand...
Click to collapse
Hi
have you disabled google play services ?
or you can try the following Google settings >location >location mode >choose battery saving mode or device only
battery saving and device only should reduce battery drain if you have to have gps on, otherwise shut gps ,Google play services can still function without gps .i think high accuracy while more accurate it is not yet optimized for day to day use yet
The Google play services affects most devices which have kitakt
Several of my coworkers have this phone on Rogers. They have had this problem for years. The phone stays "Awake" all the time, even when the screen is off.
I have the same one but on Bell. It worked fine for about 2 years. All of a sudden this week I have the same problem as them. Phone stays awake all the time and battery now goes dead in ~4-6 hours instead of 2-3 days when not used.
Very frustrating. Any known fix is appreciated.

Battery Drain Advice

Hi All
Disclaimer: I'm new to the forum so apologies if this is in the wrong discussion area etc!
I got my Galaxy S9 on Friday 9th, prior to that I had an LG G5 which is now gone. In the last few months of using my LG G5 the battery life was questionable - the phone would get hot (sometimes without even using it a lot) and the battery would drain by 30% an hour. I noticed, but didn't test fully, that Google Play Music seemed to really cane the battery and phone - i.e. was getting hot and draining quickly. As an example, I'd leave home at 7am taking it off charge at the last minute (100%) and get to my office at 9am and it'll be at 50% and very warm. Prior to that (can't exactly pinpoint when the drain started to really kick in) it would only drop to 85% - much more acceptable.
The G5 has a replaceable battery - 2800 if I recall . So I threw down £50 on an official LG site for a new slab of Lithium - slight improvement, but still terrible and warm. 55% instead of 50%.
"Right - time for a new phone" as I assumed that 2 years of app updates meant the CPU was lagging. Bagged a Galaxy S9 - today was my first commute into the office. Started on 100%, arrived at 55% with a 3000 battery! And it got super warm like the G5.
Most of that time I used Google Play Music, which according to AccuBattery the discharge speed was "33% per hour". Second was Google Chrome at 30% per hour (though I didn't use it much at all on the journey).
My question is - what logs can I check, or apps I can use, or something to find out what's going on? I need to test a few things of course to pinpoint the issue. If it helps - I restored from my G5 when I setup my S9.
seems like you might have have some options enabled in Google Play Music / chrome - that is keeping the phone awake
generally when you switch phones they apps and their settings get transferred automatically now - worth maybe uninstalling them for a day and see if you're still experiencing this issue
other than that it could be that your commute involves travelling thru areas of no signal where the phone keeps trying to find a signal - that can drain battery a lot
tim2london said:
seems like you might have have some options enabled in Google Play Music / chrome - that is keeping the phone awake
generally when you switch phones they apps and their settings get transferred automatically now - worth maybe uninstalling them for a day and see if you're still experiencing this issue
other than that it could be that your commute involves travelling thru areas of no signal where the phone keeps trying to find a signal - that can drain battery a lot
Click to expand...
Click to collapse
Thanks - I'll try that next time. Might also try a factory reset but not restore from the LG G5 backup to see what happens then.
how bright is your display? do you leave it on all your commute?
Got your wifi enabled which hunts for a signal even though you aren't using wifi? try turning it off. Same with location setting.
And how strong a signal do you have on your commute. Streaming lots of data on a really weak signal will kill battery, too.
Go into settings and see whats draining your battery.
Battery Drain Issue of S9 - Resolved
:laugh:Hi All,
I could resolve the Battery drain issue but not touching any other setting of the new phone by just disabling the backend data usage of all application expect few like Edge screen, Gmail, Flipboard etc... Now the android system power usage is back to 4-5%. Previously it was 21%-25%. So issue resolved. Need to find out the way to inform this to Samsung so they can identify which app is consuming full battery power.
dondit said:
:laugh:Hi All,
I could resolve the Battery drain issue but not touching any other setting of the new phone by just disabling the backend data usage of all application expect few like Edge screen, Gmail, Flipboard etc... Now the android system power usage is back to 4-5%. Previously it was 21%-25%. So issue resolved. Need to find out the way to inform this to Samsung so they can identify which app is consuming full battery power.
Click to expand...
Click to collapse
Hi, i'm facing ridiculous drains too and factory resetting hasn't seemed to help. I'm trying your resolution, but I don't entirely understand you. Could you kindly guide step by step? also, if you mean going to optimise battery usage, when i go there and select the 'apps not optimized' all the apps there are greyed out therefore not allowing me to select them.

Horrible Battery life on Pixel 2 XL (Pie) (6%/H Drain)

I'm a really light user. I lost a little less than 2% every hour. Basically I use it as a purely communication device. Mostly check facebook messenger, my emails, and occasionally, browse facebook, reddit, 9gag or watch a short youtube video. I stay up about 16 hours on average and at the end of the day, I was regularly around 80%. If I left the phone unplugged overnight while I slept, I only lose about 6% over 8 hours. I was really happy with the battery life. I could very easily see 3 full days out of my phone off a single charge. This was before the Pie update. I tried both the Beta and the Stable once it released, and my battery life has suffered severely. I'm losing 6% every hour, even with the screen off the entire time. At the end of the day, my phone is in the red and has already turned on power saving mode. Android Pie has killed my Pixel 2 XL's battery. I gave it 2 weeks to "learn" my usage habits, but ultimately, I factory reset and even went back to 8.1, but I still suffer from battery issues. Battery usage gives no hint to the culprit. My phone has been unplugged for 7 hours, with 45 minutes of screen on time, and at 54% remaining battery life. Screen On time is the highest battery drain according to the system battery stats. I didn't have this issue until I installed Android Pie Stable.
I have no idea what could be going on, but could really use some help with this.
TL;DR: From 2% to 6% per hour battery drain on Pie. Reverted to Oreo and FR but still an issue. Advice?
Did you check if the WiFi scanning is turned ON? Settings --> Location --> Scanning
I feel its the only issue, nothing should drain your P2XL crazy if apps remaining constant factory reset.
-- personal experience.
I also use it very similarly to you and easily get 2 days with a single charge on Pie. During night my device drains 1 or 2 % only (wi-fi, bluetooth and 4g on), but I have wi-fi scanning off. Google location services are on (including Location Accuracy on). "At a Glance" is turned off but still using stock Pixel Launcher. No hacks/mods installed.
Same except I have at a glance enabled. I disable it 6 hours ago to test and didn't affect battery drain at all. Still losing 6% every hour. Location and scanning settings default except connect to open WiFi is enabled. Right now testing if connect to open WiFi and Bluetooth WiFi location improvement affecting battery drain.
Testing that now. Will report in a day. Heading to bed now. Gn
Does the phone charge all the way to 100%? Does the phone ever turn off by itself when low on battery ~10%? Install and run Accubattery. After a few charging cycles you will get a very close approximation of your battery's remaining capacity as compared with new in mAh. Battery capacity will be located under the health tab. The more charge cycles you monitor, the more accurate it gets, but it will zero in on a number pretty quickly after the first 2-3 charges. Could be the battery... stranger things have happened. This also assumes the user has fully wiped the phone several times going between DP's, Pie and reverting to Oreo.
Does the phone charge all the way to 100%?
- Yes
Does the phone ever turn off by itself when low on battery ~10%?
- Honestly, I don't know. I never let my battery get that low.
Install and run Accubattery. After a few charging cycles you will get a very close approximation of your battery's remaining capacity as compared with new in mAh. Battery capacity will be located under the health tab. The more charge cycles you monitor, the more accurate it gets, but it will zero in on a number pretty quickly after the first 2-3 charges. Could be the battery... stranger things have happened.
- Will do
This also assumes the user has fully wiped the phone several times going between DP's, Pie and reverting to Oreo.
- You assume correctly.
Didn't seem to help.
Didn't seem to help at all.
Video of battery stats and settings.
https://drive.google.com/open?id=164lujTgzt6hihESdFlkb0AdQdOFGiYtX
I changed some settings and now I'm getting 17mAh drain. Fixed.
The biggest battery sucker for me was having Auto-connect to open wifi enabled and fixing stuck sync tasks. It was preventing my phone from sleeping.
Great to know you were able to stop the draining, I think it might be of great help to other P2XL owners to know what were the settings you changed that fixed the issue.
What settings did you change?
I am having the same issue. I would be interested in hearing your changes as well. Thank you
Download and install Accubattery to monitor your mAh usage. Make sure you check your deep sleep percentage. By the sound of things, your phone is running hot when idle, so it's not sleeping like it should be. You can install Wakelock Detector Lite to see which apps are keeping your phone awake. Once you find out what apps are draining your battery, use the System battery manager in Settings to restrict battery usage for those apps. If that doesn't help, then uninstall the app (unless it is necessary to you). If an app isn't keeping your phone awake, then it may be your system settings. Turn off location scanning for wifi and bluetooth (in the GPS section). Turn off Wifi auto-connect to open wifi. Where I live I have pretty weak cellular connection. I opted to disable Mobile data always active in developer options (Go to about phone, and tap the build number 7 times, then enter your device password). While you are here, you can check Running services in developer options and see what you have running. Also, make sure your accounts aren't stuck trying to sync. If they are, cancel the sync and restart it. Depending on how far you are backlogged, this can take a while. If the sync still gets stuck, try removing and re-adding the account that is getting stuck.
After I restricted/uninstalled the misbehaving applications and tuned the device settings, I'm getting great standby time on my Pixel 2 XL. If I close all my apps before putting the phone back in my pocket, according to accubattery, I'm losing 15mA/h or about 0.4%/h. If I charged my phone to 100%, then unplugged it without using it at all, it would take 10 days for the battery to run out. It's pretty good. As someone who primarily uses their phone as a communication device and research tool, I'm a pretty lightweight user.
+1 What settings did you change?
Yes, please, don't keep us in suspense!
Just got a used one so trying to learn all about getting optimum performance.

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