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Recently I have noticed on several occasions that my phone have gotten hot and started eating away the battery. One time I had around 30% battery and the phone was laying in my pocket. I felt the heat through the pockets and took it up to see what's up. It then had 0% battery and turned itself off.
When looking at battery use in settings, it's hard to pick out one specific application that might do this. If anything it would have to be "Android system", right now it's tied with the screen on 40%, but I charged the phone an hour ago and I haven't used the screen much.
Edit: I should add that the same thing just happened, from 99% to 89% then it stopped. That's why the information above about battery usage is relevant.
Do you think it might be hardware-related, like a partial short circuit or something, or is it most likely a software thing?
Bump. 10 signs.
Had mine for a few days, have not experienced anything like what you describe
I have though felt the screen get hot when turned on full brightness and reading a e-book on it (white - black text)
Well this is while it's laying in my pocket, with the screen off, so it's not the screen. (it's the battery that gets hot)
Take it back.
[Funny story that probably isn't relevant. I had a dodgy micro sd card that made my phone drain battery super fast and as a result my phone got incredibly hot. Took it out and it's back to normal.]
Sounds software related to me, your android system should definitely not be 40% of your battery. It sounds like some rogue app/process is utilizing your cpu and thus your battery very heavily. If you select the "Android system" in the battery usage list, does it not give you a further breakdown of what is included in that that is using your battery? Also, what does it say for the cpu time for the android system?
May be firmware bug
I've had this happen to me a few times when I was running the original firmware. In some early firmware there was a bug related to switching between wifi and 3G, which would get it stuck so that you couldn't toggle wifi on or off. The times this happened to me, it was also stuck in the wifi bug (although I had the wifi bug and it didn't drain the battery).
I now run the newer firmware (JG4) and both problems have stopped.
I've had this problem with my asian i9000 since the beginning. The app called Top showed me that it is ksoftirq/d that is running and System Panel showed me that the cpu was running at 100% at 1ghz.
At first the only solution seemed to be restarting the phone. However some information shared on this forum led me to try restarting wifi which also works. For that thread search for "ksoftirq/d."
David
Sent from my GT-I9000 using XDA App
I have had the "stuck wifi" bug, but I'm not sure if it was happening the last time this happened. I'll check it out the next time.
There's no official firmware update on Kies for Norway yet, so I think I'll wait for one.
Had exactly the same problem and tracked the culprit - it was Fancy widget in my case. Removed it, installed Beautiful widget and all is well since
Sent from my GT-I9000 using XDA App
That might actually be it. If I'm not mistaken Fancy Widget had 30% battery consumption when I checked. I deleted it just to see if it would make a difference. So far so good.
Some details:
Fancy Widget will hit the 100% cpu on auto-refresh if there's no data connection available (either wifi or cellular). It seems there are 2 bugs with Fancy Widget; it ignores "auto-refresh off" option and it tries to connect to server even when offline.
A dirty work around would be to set refresh time to let's say 12 hours and make sure to manually refresh at least once every
That makes me even more convinced that Fancy Widget is the culprit. I usually have cellular network disabled (APNDroid On/Off Widget) to save battery and my wifi connection keeps loosing connection, probably due to some software bug in XXJF3 stock firmware.
I don't know what all your experiences are, but I noticed the past few days that my epic is getting hot on the back.
I also noticed that my battery is draining more so than usual. When I got the update last week my battery life sucked, but now since this overheat thing it's gotten worse. It drops a lot even when in standby.
I do not have gps, wifi, anything else on. I am not rooted. Didn't do any battery tweaks. This is completely stock di18.
This is normal use with 3g. It's getting annoying and I'm hoping someone has an answer. Thanks!
Do you have any email accounts configured in the mail application?
This happened once or twice - I rebooted the phone and all was peachy.
Sounds like you have a rogue process wearin it out.
Yeah my phone overheated yesterday while charging....this phone has a few more steps to go before it really beats my hero...
Sent from my SPH-D700 using XDA App
I partly found out what the problem was, but it seems you guys are ahead of me. I had some process keeping my CPU running at 95-100% nonstop. I still haven't figured out what the process was, as now it is back to the normal 5-15%, but I'll have to keep an eye on it now.
the task manager widget turns red and it shows you what process was causing it...for me it was the xda app...a few times.
I think my problem was not backing out of WordFeud. I didn't notice anything on the task manager though. Hasn't happened since that one time.
this happens to me when i'm plugged in and using gmail. screen flickers and then shuts off. the screen-off battery indicator shows the batt. gauge and a little thermometer sign next to it indicating it's too hot.
wtf?!?! this has to be a defect. anyway, is there any official word on this? any pr from sammy/sprint?
i have read elsewhere about some epics resetting themselves a few times a day which could indicate an issue with heating (at least on a pc). so if you think it might be hardware its possible. otherwise keep doing what your doing, monitor your processes for anything thats eating it up, go to about phone > battery use > cell standby to see your time without signal. the higher this is the more battery use. also, might want to consider a startup manager to prevent the 2 DRM files (search forums) from running as this can affect batt life too
you can also use setcpu even (free on here, search it) to throttle your cpu down when it hits a certain temp.
This is very interesting... My wife and I both have this phone, she has had this happen several times after the last update (I though she was just crazy). Me on the other hand... No problem!
I need to look into this a little deeper.
The only time my epic's battery gets hot is during heavy use or gps. Gps/Nav makes it heat up like a mofo. But other than that... *knocks on wood* Its all good, no problems. As far at battery life, I am rooted and using SetCPU to turn down the processor while the screen is off, helps a ton. Not using anything other than that... was using juicedefender but then I started not getting calls or text...
Sent from my SPH-D700 using XDA App
One thing, I learned, that didn't help my battery was putting my phone in the locker at work. That thing must have killed my TWS and ate my battery alive.
i feel like this thread will start to die but i had a weird somewhat related issue last night. i too have had maybe 3-4 times where i woke up to my charging phone with the red LED and a screen that would not turn on, battery pull, worked fine.
however, THIS morning my phone would freeze like 30 seconds after boot EVERY time. tried a few things to no avail until I wiped, reinstalled my ROM (aosp 0.4.1) and the data from a previous backup (which was the way i got that ROM to first boot successfully according to tips in that thread).
so this worked, but i couldnt figure out why my other steps wouldnt. had to be something in the data partition of my system at the time, since changing that worked. the only thing i could think of is that app watchdog which someone mentioned to track processor usage by apps. anyone else ever experience this?
I have experienced this once when I was playing Robodefense while the phone was charging. My phone tends to get a little warm when it charges, and hot if I run something intensive while its charging. Wondering if this will be an issue when I use this phone for GPS nav while plugged into my car.
Sent from my SPH-D700 using XDA App
"I'm having this problem too...I didn't get any warranty for this either. Any reasons onto why this is happening...I woke up this morning and picked up my burning phone lol the temp was at 50C so I took out the battery and let it sit for 15 mins...it went down to 30C, then after not touching it for another 15..it was at 17C...very odd...what should I do, this crap is going to die within the next hour I'm worried it will fry the hard drive or something. Need help! " - I wrote this on a diff. forum a couple days ago
I dont have anything on, no wifi, gps, or any 4g (lol only if I could find it)...I even got rid of my facebook/twitter/weather updater widgets. The only thing that updates is email, and that's only if I click on it. The battery has been dying a lot faster and I charge my phone next to the window now because its like 20 degrees outside here in Chicago, so that brings down my phones temp lol....and today, my phone's battery life went from 100 to 5 percent in about three hours of barely using it...wtf?!
Also, another problem...sometimes when I lock my phone and unlock it after taking it out my pocket or something, the screen doesn't seem to respond...I keep swiping my finger over it to put in my password and it wont do anything and it only works when I slide up my phone for the horizontal view. This happens like 4 out of every 10 times I open phone.
Very embarrassing especially if your trying to get someones number down, I stopped showing off the phone now ...lol
Im currently on XXJVS with Semaphore 1.7 kernel, but i have experienced the same behaviour the last weeks (or maybe i just started noticing recently): traveling starts a battery drain
Update: see post #22
Some background:
I suffered from the Android Process battery drain up to XXJVR. Flashing XXJVS seems to have improved things (after numerous reflashes of XXJVR and XXJVQ which didnt help. My phone's cpu keeps between 1% and 3% when sleeping, but i have noticed that Cpu rockets to like 30% as soon as i leave my house to go to work, or leave work to go home. Its as if the phone keeps trying to connect to some network all the time, but only while in motion (and trying to lock in from tower to tower?). The problem is however that Systempanel nor the log give great clues where to look.
Examples:
In this first example, my phone is hooked to the charger during the night, and the alarm clock is running (hence the steady 10% cpu load). As soon as the phone is disconnected, cpu drops to low levels. On the exact minute i leave home, cpu rockets. And yes,i arrived at work around 07:50.
Home environment:
- connected to wifi
- good 3G coverage
- 3G, Bluetooth,GPS enabled
- no Bluetooth profiles present
Work environment
- wifi network present but not connected
- average 3G coverage
In this second example, i'm at work, hardly using the phone. Without touching the phone, stepping into my car and driving off, the cpu kicks in again. Notice there is no Device Usage whatsoever at the moment the CPU climbs. Bluetooth profiles active at this point and paired & connected to the carkit.
This last screenshot shows the typical clues (or lack thereof) that SystemPanel shows: just the System process using the most CPU.
Also the logcat doesn't provide much clues (or too many maybe) either. I have found that some applications couldn't contact GoogleAnalystics because i have AdFree installed, so i uninstalled those apps.
Frankly, i don't know where took look further. The damn android 'System'process just doesn't give enough clues. I have formatted internal & external SD, deleted cache & Dalvik cache, flashed & factory resetted to no avail. I'll try to have a log running tomorrow morning just before leaving the house to see if i can find what log entry corresponds to the system process kicking in. In the meantime, has anyone ever seen this behaviour, or any hints where to look?
adb bugreport > c:/report.txt
look there maybe
Install System Tuner pro it has option to record processes(+analyzer ) better than System Panel.
..try freze Maps or turn off network localization -Uncle Google likes to locate phone very often .
Sent from my GT-I9000 using xdapp
Hi,
Same phone and ROM, same problem.
Keep us updated!
Hmm, I have heard Galaxian kernel is battery sucker too...
Regards
wingg said:
Install System Tuner pro it has option to record processes(+analyzer ) better than System Panel.
..try freze Maps or turn off network localization -Uncle Google likes to locate phone very often .
Click to expand...
Click to collapse
in short words - bull****
i have not touched (freezed/deleted) any app
yet still i have not noticed a drain, any kind of drain
let him determine what app is causing the 100% cpu usage first
prior to advising him to freeze or delete anything - that is wise you have to agree
also localization service would not provide such high cu usage
think please
Hi,
It might be facebook 1.7.1. There are several complaining comments that "upload manager" process is running in the background and prevents phone from going into deep sleep mode.
i got data connection active all the time with all apps syncing (gmail, twitter, facebook)
and phone got no problem sleepin =)
pwhooftman said:
Im currently on XXJVS with Semaphore 1.7 kernel, but i have experienced the same behaviour the last weeks (or maybe i just started noticing recently): traveling starts a battery drain
Some background:
I suffered from the Android Process battery drain up to XXJVR. Flashing XXJVS seems to have improved things (after numerous reflashes of XXJVR and XXJVQ which didnt help. My phone's cpu keeps between 1% and 3% when sleeping, but i have noticed that Cpu rockets to like 30% as soon as i leave my house to go to work, or leave work to go home. Its as if the phone keeps trying to connect to some network all the time, but only while in motion (and trying to lock in from tower to tower?). The problem is however that Systempanel nor the log give great clues where to look.
Examples:
In this first example, my phone is hooked to the charger during the night, and the alarm clock is running (hence the steady 10% cpu load). As soon as the phone is disconnected, cpu drops to low levels. On the exact minute i leave home, cpu rockets. And yes,i arrived at work around 07:50.
Home environment:
- connected to wifi
- good 3G coverage
- 3G, Bluetooth,GPS enabled
- no Bluetooth profiles present
Work environment
- wifi network present but not connected
- average 3G coverage
In this second example, i'm at work, hardly using the phone. Without touching the phone, stepping into my car and driving off, the cpu kicks in again. Notice there is no Device Usage whatsoever at the moment the CPU climbs. Bluetooth profiles active at this point and paired & connected to the carkit.
This last screenshot shows the typical clues (or lack thereof) that SystemPanel shows: just the System process using the most CPU.
Also the logcat doesn't provide much clues (or too many maybe) either. I have found that some applications couldn't contact GoogleAnalystics because i have AdFree installed, so i uninstalled those apps.
Frankly, i don't know where took look further. The damn android 'System'process just doesn't give enough clues. I have formatted internal & external SD, deleted cache & Dalvik cache, flashed & factory resetted to no avail. I'll try to have a log running tomorrow morning just before leaving the house to see if i can find what log entry corresponds to the system process kicking in. In the meantime, has anyone ever seen this behaviour, or any hints where to look?
Click to expand...
Click to collapse
i think you should go out and do some thing better with your life then watching what a battery uses
i think its a waste of space to quote WHALE post
and well if he got battery drained overnight it is important to determine why
it should not happend
Just a quick question, where is the phone when you are in the car? I have noticed that if I keep my phone in my trouser pocket while driving, I loose signal frequently, shown on Bluetooth unit, and over a 3hour journey I can loose 30% battery, but if I put the phone in my shirt pocket I do not loose signal and my battery loss is about 20%.
My theory is that the phone signal finds it easier to penetrate the glass windows of the car rather that the metalwork.
Similarly to Geryatrix, when I leave my phone beside my bed (=~~, best place for alarm), my battery drains because the phone stays with a very low network signal and keeps searching for better antennas, I guess. But then at "Battery Usage" I could see that "Cell Standby" was eating my bat, not the "Android System".
battery drains from wifi staying connected in idle state - thats a bug in my opinion from samsung - it should not use such ammount of energy
data connection in idle is almost unnoticable in battery use
When I had facebook 1.7.1 installed, "Android System" was consuming 20% battery.
After I uninstalled facebook 1.7.1 and the problem is gone, "Android System is back
to normal, about 4%.
got-petrol said:
i think you should go out and do some thing better with your life then watching what a battery uses
Click to expand...
Click to collapse
I think you should learn not to quote an entire long message for the sake of making 1 stupid remark
Start post will be updated in a few minutes with some new information.
seems like one of apps you use is trying to connect somewhere
have you made bugreport - i think you will find the culprit there
Have you tried disabling fast dormancy? Maybe these wakelocks are caused by incompatible 3g cell.
Use *#*#9900#*#* to find option to disable it.
Sent from my GT-I9000 using xda premium
$omator said:
think please
Click to expand...
Click to collapse
No comment...
Sent from my GT-I9000 using xda premium
wingg said:
No comment...
Sent from my GT-I9000 using xda premium
Click to expand...
Click to collapse
and what is your problem to start oftop whining?
use report button if you do not like my post or tone of it
and freezing/deleting apps is not and never will be an issue solver
system works perfect with none of stock apps touched
using memory killers and altering system with such freeze options
is on the other hand source of 9 on 10 problems
$omator said:
battery drains from wifi staying connected in idle state - thats a bug in my opinion from samsung - it should not use such ammount of energy
data connection in idle is almost unnoticable in battery use
Click to expand...
Click to collapse
Hi,
I have opposite experience. Keeping Wifi enabled causes almost no battery drain for me, keeping 3G enabled does big time. My Galaxy Tab 10.1 Wifi version is set to never let the wifi connection sleep, and still battery drains no more than 1% or 2% a day is the tablet is not used.
I tested today with Wifi disabled. Still the Enter Dormancy messages appear each 5 seconds, altough the CPU hit is less. The Fast Dormacy messages seem purely cell-tower related, and wifi-unrelated. The Dormancy messages start as soon as i start moving, and stop when i'm home. I will update the startpost agan tonight.
---------- Post added at 06:55 PM ---------- Previous post was at 06:52 PM ----------
Kurre said:
Have you tried disabling fast dormancy? Maybe these wakelocks are caused by incompatible 3g cell.
Use *#*#9900#*#* to find option to disable it.
Sent from my GT-I9000 using xda premium
Click to expand...
Click to collapse
Hi,
I entered this Sysdump menu, the button read ""Enable Fast Dormancy" so i guess that means it was disabled all along. I enabled fast dormancy and will continue to test.
Hi all,
Got the 2.3.6 (GRK39F) system update this morning but I've noticed today that my Nexus One is running unusually hot despite me not really using it.
I've tried rebooting and the problem seems to remain.
Battery temperature is coming up as 37.6 °C according to the test app (having typed *#*#4636#*#* into the dialer)
Anyone else having a similar problem? Any suggestions to further debug or resolve?
I haven't got the update yet. But if it keeps getting worse, I would try a factory reset.
No issues here, I am at 32.5°C with light use.
Not sure what I did but it seems to be back to normal now. I fiddled round switching on and off wifi/gps/sync etc and charged the phone over night and it was fine in the morning and has been today.
I've seen similar issues.
I've also noticed battery life has gone down significantly.
I've investigated a bit and noticed that suddenly my Facebook app was consuming about 30% of the power (i barely use the facebook app).
It turns out this has been keeping the GPS on for ages... and i could see my GPS always looking for a lock.
I uninstalled facebook (as much as i can, you can't really remove it completely on stock..) and this seems to make things much better.
Maybe you're seeing the same problem?
HaggleLad said:
I've noticed today that my Nexus One is running unusually hot despite me not really using it.
Click to expand...
Click to collapse
Have your phone been plugged into a computer via USB when you realized that issue?
I'm asking, because a while ago i realized my Nexus One's battery got extremly hot when connected via USB, though it turned out that it only happened, when using not the original USB cable.
itay1 said:
I've seen similar issues.
I've also noticed battery life has gone down significantly.
I've investigated a bit and noticed that suddenly my Facebook app was consuming about 30% of the power (i barely use the facebook app).
It turns out this has been keeping the GPS on for ages... and i could see my GPS always looking for a lock.
I uninstalled facebook (as much as i can, you can't really remove it completely on stock..) and this seems to make things much better.
Maybe you're seeing the same problem?
Click to expand...
Click to collapse
I know I am a little late to the game on this one (no internet at home for another 10 days and I was out of town), but I was having the same issue with facebook constantly using GPS, but an uninstall and reinstall fixed it. I think it was just a botched update. Granted, I am running CM7, so I uninstalled the full app, but maybe redoing the updates will fix the gps problem for you.
Using Battery Spy I've seen that different cables support charging at different maximum current levels. If the phone seems hot during charging then its because it is actually charging faster.
The Skype app can make the phones run very hot also. I had to remove it for that reason.
So, yesterday I noticed a sudden battery drain on my nexus 4. After checking battery it showed that AndroidOS takes over about 50% of the battery usage. It also showed that time awake was pretty much the same as the amount of time since I unplugged the phone, even though I kept my phone in sleep mode for the most of the day. After some research I downloaded better battery stats and it showed that from the moment I turn the screen off a process called suspend_backoff runs pretty much the entire time. Eventually I got it down to wifi. If I turn off wifi there are no processes running after the screen is turned off (or if there are they are 30 seconds tops), but the moment I turn wifi on suspend_backoff runs pretty much the entire time screen is off. I tried removing all of my apps, as well as doing factory reset but nothing helps. The moment I turn wifi ON this suspend_backoff consumes pretty much all the time during screen off period. Is anyone experiencing anything like this ? I have 4.2.2 on the phone and I havent' seen this extreme drain until just yesterday.
I experience the samething. Android OS would drain as much as the screen time.
I narrowed it down to the suspend_backoff. But the weird thing is that when i'm at home on my home wifi, suspend_backoff doesn't seem to drain anything at all. But when I'm at school, suspend_backoff kicks in.
Anyone help?
hihihoho said:
I experience the samething. Android OS would drain as much as the screen time.
I narrowed it down to the suspend_backoff. But the weird thing is that when i'm at home on my home wifi, suspend_backoff doesn't seem to drain anything at all. But when I'm at school, suspend_backoff kicks in.
Anyone help?
Click to expand...
Click to collapse
how did you narrow it down? Im having the same problem!
This is caused by a kernel wakelock. A bad mobile connection make battery drain worse... using WLAN nearly fixes this problem.
Thought this problem has got fixed in 4.2.2, at least battery life got improved and the wakelock reduced.
If it is appearing since yesterday, it is triggered by a app often waking the phone up using mobile data (that's why fixed with WLAN) and prevent the phone from getting into deep sleep as fast as it should.
hope i could help.
I use Greenify to hibernate every single user installed apps, then I release them one by one to see which one cause suspend backoff. But suspend backoff still occurs. So I think it's the kernel itself.
AW: Battery drain on nexus 4 since yesterday
hihihoho said:
I use Greenify to hibernate every single user installed apps, then I release them one by one to see which one cause suspend backoff. But suspend backoff still occurs. So I think it's the kernel itself.
Click to expand...
Click to collapse
as i said before, an app needs data, so it starts callung the kernel wakelock... this one causes tje drain, not the app itself
Sent from my Nexus 7 using xda app-developers app
hihihoho said:
I use Greenify to hibernate every single user installed apps, then I release them one by one to see which one cause suspend backoff. But suspend backoff still occurs. So I think it's the kernel itself.
Click to expand...
Click to collapse
Yeah, definitely not user apps. I did full reset on the phone to factory settings, no user apps. Even tried disabling Google Play and Google store after the reset. Still the same. The only thing that gets rid of it is disabling WiFi.
hihihoho said:
I experience the samething. Android OS would drain as much as the screen time.
I narrowed it down to the suspend_backoff. But the weird thing is that when i'm at home on my home wifi, suspend_backoff doesn't seem to drain anything at all. But when I'm at school, suspend_backoff kicks in.
Anyone help?
Click to expand...
Click to collapse
When did you start noticing this ? Has it been for a while or just recently ? I first noticed it yesterday (had the phone for a bit over a month now, didn't see any issues until just yesterday)
hihihoho said:
I use Greenify to hibernate every single user installed apps, then I release them one by one to see which one cause suspend backoff. But suspend backoff still occurs. So I think it's the kernel itself.
Click to expand...
Click to collapse
What is the difference between greenify and limit background apps in developers options?
AW: Battery drain on nexus 4 since yesterday
stop discussing, use search instead... http://forum.xda-developers.com/showthread.php?t=1999368
like i told you 3times now.... it's the wakelock
Sent from my Nexus 7 using xda app-developers app
indoh said:
stop discussing, use search instead... http://forum.xda-developers.com/showthread.php?t=1999368
like i told you 3times now.... it's the wakelock
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
Yeah, it's clear that it's the wakelock. What's not clear is why. Also it's not the msm_hsic_host that the forum link you sent refers to. I don't have a problem with msm_hsic, that one barely takes any time during the day (maybe 30 seconds during several hours of standby). The wakelock causing this particular issue is "suspend_backoff" wakelock which supposedly happens when there is a sequence of sleep/wake calls too close together so the system decides to keep it awake. I was unable to find what exactly is causing the issue, even after restoring to the factory settings I kept seeing the same problem.
Anyway, I was able to "resolve" it by installing JuiceGuard app and setting it so it disables wifi when the screen is off. wakelock is gone now and my battery usage is back to normal.
I only get the suspend backoff wake lock when I'm connected to the university Wifi. When I'm at home, everything is fine, no suspend backoff. So my guess is that the Wifi encryption at university is different and causing a succession of close "awake" and cause wake lock.
I did factory reset like 3 times and it still there.
I'll try disable Wifi on Monday and see how it goes.
Same here, when wifi disabled the wakelock doesn't occur.
I have tried almost all of the kernels and non of them seem to help.
hihihoho said:
I only get the suspend backoff wake lock when I'm connected to the university Wifi. When I'm at home, everything is fine, no suspend backoff. So my guess is that the Wifi encryption at university is different and causing a succession of close "awake" and cause wake lock.
I did factory reset like 3 times and it still there.
I'll try disable Wifi on Monday and see how it goes.
Click to expand...
Click to collapse
Interesting... Maybe it is encryption. One thing with my Wifi is that it doesn't use password, but MAC list instead. It may indeed be an issue with different wifi encryption types.
OP do you have maps 6.14 on your phone? Mine kept switching on location reporting for a while and it woke my phone 344 times last night. I've been struggling with the same wake lock issues. I'm going to recharge (again) with maps disabled and see if that helps.
Sent from my Nexus 4 using Tapatalk 2
Check your Google account sync settings... In settings
The clowns may have left you a lovely gift there without telling you or asking any kind of permission.
The latest Maps was giving me horrible battery drain, on WiFi. I'd sleep for six hours with a fully charged phone and wake up with 10% left. it even enabled itself when. I disabled it in settings. I converted it to a user app by moving it to /data/app and greenified it. Seemed to have solved all of my issues with the suspend back off wake lock.
Download greenify
Sent from my Nexus 7 using Tapatalk 2
For some weird reason, I was also having serious battery drain suddenly since yesterday.
Turned out it was maps, and disabling Google network locations hugely increased battery life
Sent from my Nexus 4