Database Info

Battery drain issues: last attempt - with screenshos and dumps

Hi guys,
I am hoping someone may notice what's going on with my device... I am at a loss. Attaching all screenshots and dump file from BetterBatteryStats (may need to open in Wordpad for the spacing work).
To summarize, my battery drain is very inconsistent. Some days it lasts a long time, 2-3 hrs of screen time, can stay in standby for over 2 days. And then some days it drains very quickly, like right now - it drops by 3% every time I basically turn on the screen to check e-mail/messages. I think we can all agree that 4 hrs of standby and 15 mins of screen usage should not use 50% of the battery.
I have tried two different units (swapped thinking my battery was faulty), and the issue persists - so I think it has to be something related to my software setup. I am running the AT&T LTE stock phone, 1.85 firmware. I have tried doing the full factory reset (clearing all settings/apps/storage), and cycling the battery.
Some folks have mentioned that my drain seems to begin when I hit an area with low/no signal (I take the subway to work in the morning), and then persists - as if something is trying to sync/connect somewhere, but can't... so it keeps looping and draining the battery.
My autosync is only on for Gmail, Google calendar (not contacts), and Weather (every 2 hrs only). Phone is not overly hot, battery is at 86 degrees right now. My brightness is at 40%.
If someone has any ideas, please share - I am at a loss, I don't know what to do... but battery life has got to be better than this, at least in terms of consistency.
Thanks so much.

Little to no signal is a battery killer.

Right, but the phone drains like crazy after the signal is regained. It doesn't drain much while there is no signal. Besides, what are people supposed to do when they lose signal? Restart the phone afterwards or lose all battery?
Also, some days it works just fine (and I still take subway to work on those days and lose signal) - so not consistent. I don't think it's simply the fact that no signal kills my battery in this case.

SmiLey497 said:
Little to no signal is a battery killer.
Click to expand...
Click to collapse
But OP is getting huge drops in the battery level when network signal is green (full signal strength); and also screen mostly off. Which is very odd . . .

Sounds like there are other folks experiencing this issue, related to signal drop in LTE (riding a subway, etc.):
http://forum.xda-developers.com/showthread.php?t=1719227

neocryte said:
Hi guys,
I am hoping someone may notice what's going on with my device... I am at a loss. Attaching all screenshots and dump file from BetterBatteryStats (may need to open in Wordpad for the spacing work).
To summarize, my battery drain is very inconsistent. Some days it lasts a long time, 2-3 hrs of screen time, can stay in standby for over 2 days. And then some days it drains very quickly, like right now - it drops by 3% every time I basically turn on the screen to check e-mail/messages. I think we can all agree that 4 hrs of standby and 15 mins of screen usage should not use 50% of the battery.
I have tried two different units (swapped thinking my battery was faulty), and the issue persists - so I think it has to be something related to my software setup. I am running the AT&T LTE stock phone, 1.85 firmware. I have tried doing the full factory reset (clearing all settings/apps/storage), and cycling the battery.
Some folks have mentioned that my drain seems to begin when I hit an area with low/no signal (I take the subway to work in the morning), and then persists - as if something is trying to sync/connect somewhere, but can't... so it keeps looping and draining the battery.
My autosync is only on for Gmail, Google calendar (not contacts), and Weather (every 2 hrs only). Phone is not overly hot, battery is at 86 degrees right now. My brightness is at 40%.
If someone has any ideas, please share - I am at a loss, I don't know what to do... but battery life has got to be better than this, at least in terms of consistency.
Thanks so much.
Click to expand...
Click to collapse
Step 1: Remove sense.
Step 2: Proceed to experience the best battery life I have ever seen on an Android device.
If you do not want to remove sense then you need to take a very close look at your apps because something in the apps is responsible. I personally think its HTC sync or some other rediculous service that comes preinstalled on the phone. Something is trying to sync or communicate and is hanging.
Like I said, get rid of sense and save yourself the hassle. Nova Prime + AOKP = the best mobile operating system known to man.

I am a bit new when it comes to Android and all the various ROMs out there. To remove Sense, do I need to unlock the bootloader and install a custom ROM? Or can I install an alternate launcher (like Nova Prime)?
Thanks!

neocryte said:
I am a bit new when it comes to Android and all the various ROMs out there. To remove Sense, do I need to unlock the bootloader and install a custom ROM? Or can I install an alternate launcher (like Nova Prime)?
Thanks!
Click to expand...
Click to collapse
To remove sense you'll need to install a custom ROM such as AOKP or cm9. Those will remove sense. You can find AOKP in the general section under the title "AOKP lives!!" and cm9 under developement. They both have flaws such as the camcorder not working, but considering the flaws that sense has out of the box, you're much better off in my opinion. cm9 and AOKP will get infinitely better in the coming weeks as they iron out the bugs. Sense is disgusting bloatware that is piled on top of stock android. It takes a ton of resources and makes even the simplest tasks a chore. Once you go to an AOSP ROM I don't think you'll ever go back. I can multi task away for hours and come back to another app that wasn't closed out of memory. Try that with sense.
To install a ROM you'll need to:
Root
unlock bootloader
Install a custom recovery
Backup your entire ROM with that recovery
Flash whatever you want
All of the directions of how to do this are in the dev section. Let me know if you have any questions.

Installing a AOSP ROM (such as CM9 and AOKP) will completely "desense" your phone.
Installing a ROM based on stock (like all of the CleanROMs) will get rid of most of the HTC stuff but Sense will still be there.

Thank you seh and rohan, I will give that a try. Will read up on it and let you know if I have questions.

neocryte said:
Thank you seh and rohan, I will give that a try. Will read up on it and let you know if I have questions.
Click to expand...
Click to collapse
Seriously just go check it out in the dev section. If you are unsure or have any questions at all come back here and let me know. I can walk you through all of it. Don't be afraid of ruining your device or anything like that. This stuff is all one click these days and isn't bad at all. I can literally walk you through every step if needed. Just check it out yourself though, I bet you'll be fine

Thanks again. Reading through the dev section now. Seems relatively straight-forward... just need to get home to get this stuff going.

neocryte said:
Thanks again. Reading through the dev section now. Seems relatively straight-forward... just need to get home to get this stuff going.
Click to expand...
Click to collapse
FYI, the root process failed for me 2 times before it took. Just keep trying and it will go. Once you are rooted, you'll never have to plug your phone into a computer again. You can do anything from the device, no questions asked.

neocryte said:
Hi guys,
I am hoping someone may notice what's going on with my device... I am at a loss. Attaching all screenshots and dump file from BetterBatteryStats (may need to open in Wordpad for the spacing work).
To summarize, my battery drain is very inconsistent. Some days it lasts a long time, 2-3 hrs of screen time, can stay in standby for over 2 days. And then some days it drains very quickly, like right now - it drops by 3% every time I basically turn on the screen to check e-mail/messages. I think we can all agree that 4 hrs of standby and 15 mins of screen usage should not use 50% of the battery.
I have tried two different units (swapped thinking my battery was faulty), and the issue persists - so I think it has to be something related to my software setup. I am running the AT&T LTE stock phone, 1.85 firmware. I have tried doing the full factory reset (clearing all settings/apps/storage), and cycling the battery.
Some folks have mentioned that my drain seems to begin when I hit an area with low/no signal (I take the subway to work in the morning), and then persists - as if something is trying to sync/connect somewhere, but can't... so it keeps looping and draining the battery.
My autosync is only on for Gmail, Google calendar (not contacts), and Weather (every 2 hrs only). Phone is not overly hot, battery is at 86 degrees right now. My brightness is at 40%.
If someone has any ideas, please share - I am at a loss, I don't know what to do... but battery life has got to be better than this, at least in terms of consistency.
Thanks so much.
Click to expand...
Click to collapse
Here is what I'd do before installing custom ROMs etc. (Not that I am discouraging you against that but, if your device is indeed faulty then unlocking the bootloader will void your warranty and HTC may not replace/fix it.) And, you'd have wasted countless hours trying to fix the issue with software that was hardware to begin with.
1. Run the battery test *#*#3424#*#*, press 'Accept', Go to More and run 'Battery Test'. Follow instructions in there. If the battery isn't faulty i.e. after one hour the battery level is still greater than 85% (The function test shows a different number) your battery is fine. Else, ask HTC to fix it.
2. If your phone passes the battery test; turn on 'Airplane mode' when you get into an area with spotty signal. This should address your suspicion regarding that.
3. Display: display seems to be draining the most battery - doesn't mean it actual does but, at least the phone seems to think it is. Try reducing brightness to around 20% for a day - I know it is too dim but, it will eliminate that possibility.
4. If you have facebook installed - turn off all syncing. Especially the HTC sense social plugin always tries to update it from facebook.
Based on the screenshots, it seems that the battery drains very quickly when you have the screen on, even with good signal strength.
Lastly, as an alternative to point 2 above, turn on airplane mode for 1 hour and turn off sync, remove all widgets from home screen(s) and just use the phone on wifi with stock browser - see if it drops as quickly or not.
Having gone through it, I understand how frustrating this is. In the end, I rooted and completely desensed my phone (only keeping essentials - basically recreating clean rom). I do not use Auto Sync but manually engage it every few hours to update everything. And, keep the brightness to 30% most of the time.
Hope this helps, good luck.

john_tillman, thanks for the suggestions as well!
1. I did the battery test, finished at 92%. So I think I'm OK there.
2. I will try doing airplane mode before subway rides going forward, will see if that helps.
3. Something is funky with the way the battery meter app is measuring this. Basically the battery doesn't move - and then when I unlock the phone, it drops like 3%. So my suspicion is that I'm losing battery, it just doesn't get updated until I fire up the screen.
4. Yep, all syncing is turned off. I only have Gmail/Gcalendar syncing now.
I've been playing around with the phone(s) earlier as well - keeping it in airplane mode and just watching movies/etc. makes it last forever. It really does seem to be something with the signal and perhaps something in Sense.
Have you tried CleanRom? I do like the visuals in Sense, would be sad to go to bone-stock ICS... but battery is more important.

neocryte said:
john_tillman, thanks for the suggestions as well!
1. I did the battery test, finished at 92%. So I think I'm OK there.
2. I will try doing airplane mode before subway rides going forward, will see if that helps.
3. Something is funky with the way the battery meter app is measuring this. Basically the battery doesn't move - and then when I unlock the phone, it drops like 3%. So my suspicion is that I'm losing battery, it just doesn't get updated until I fire up the screen.
4. Yep, all syncing is turned off. I only have Gmail/Gcalendar syncing now.
I've been playing around with the phone(s) earlier as well - keeping it in airplane mode and just watching movies/etc. makes it last forever. It really does seem to be something with the signal and perhaps something in Sense.
Have you tried CleanRom? I do like the visuals in Sense, would be sad to go to bone-stock ICS... but battery is more important.
Click to expand...
Click to collapse
I experience the same thing. After my subway commute and after I regain signal, battery doesn't drop until a couple of seconds after o turn on my screen, but it drops like 3%.
Sent from my HTC One X using Tapatalk 2

Rooting, and unlocking the bootloader
I was able to go from stock 1.85, to sick-sense ROM in a matter of minutes yesterday. I was nervous at first even though I know what I was doing, although all was good after following the instructions given on each step of the process. I haven't really bricked a phone before because this was my first smartphone ever, But I believe that the worse thing that can happen is soft bricking your phone, which can be resolved by RUU. I hope this helps you out.
Regarding OP, I had MUCH MUCH more battery life compared to bone stock. I used to get 3 hrs screen on time with 20% brightness, now Im at 4-5 on 50% under similar usage. One last thing to note; LTE, Auto sync, GPS, and low reception, are the most battery eating thing on the phone assuming you don't have rouge apps (wakelocks).

JCon0320 said:
I was able to go from stock 1.85, to sick-sense ROM in a matter of minutes yesterday. I was nervous at first even though I know what I was doing, although all was good after following the instructions given on each step of the process. I haven't really bricked a phone before because this was my first smartphone ever, But I believe that the worse thing that can happen is soft bricking your phone, which can be resolved by RUU. I hope this helps you out.
Regarding OP, I had MUCH MUCH more battery life compared to bone stock. I used to get 3 hrs screen on time with 20% brightness, now Im at 4-5 on 50% under similar usage. One last thing to note; LTE, Auto sync, GPS, and low reception, are the most battery eating thing on the phone assuming you don't have rouge apps (wakelocks).
Click to expand...
Click to collapse
GPS has no affect on battery life unless it is being actually used. Its not going to drain battery just by being enabled. Auto sync has minimal impact on battery as well, unless you are getting 5 emails every 1 minute. Push is always more battery friendly than pull. (unless there is heavy traffic)
About the low reception thing. While it does indeed affect battery life when the phone is constantly looking for service, it is not as bad as you would think. I sit in an area at my work that has about 1 bar of service. The phone will go from 1-0 bars to searching, about every 5 minutes or so ALL day long for 8 hours. To see the impact this had on my battery life, I did some experimenting. I basically ran my phone in airplane mode for 3 days and then compared and averaged the results over 3 days of normal use with the phone having bad service.
I lost 8% more over an 8 hour work day.

neocryte said:
john_tillman, thanks for the suggestions as well!
1. I did the battery test, finished at 92%. So I think I'm OK there.
2. I will try doing airplane mode before subway rides going forward, will see if that helps.
3. Something is funky with the way the battery meter app is measuring this. Basically the battery doesn't move - and then when I unlock the phone, it drops like 3%. So my suspicion is that I'm losing battery, it just doesn't get updated until I fire up the screen.
4. Yep, all syncing is turned off. I only have Gmail/Gcalendar syncing now.
I've been playing around with the phone(s) earlier as well - keeping it in airplane mode and just watching movies/etc. makes it last forever. It really does seem to be something with the signal and perhaps something in Sense.
Have you tried CleanRom? I do like the visuals in Sense, would be sad to go to bone-stock ICS... but battery is more important.
Click to expand...
Click to collapse
No, I didn't try clean ROM. But, I took the change log from one of the clean ROMs and deleted most of the apps that can be safely deleted. So, I do sort of have a clean rom and it works fine so far - in terms of battery life. When I used to boot with stock rom, I used to have 150 - 170 mb free ram. With the clean up that I performed - now, free RAM is 270 - 300 mb after a reboot.

Try disabling LTE and see how your battery does.
Click on mobile network settings, and choose gsm/hspa auto.

Very High Android OS battery usage

I recently received an Nvidia Shield and updated it right away to 4.4.2.
Today I noticed that overnight the Android OS was taking up a large portion of the battery life. The Shield's Android OS used 70% of the battery while my Nexus 4 usually only uses 12% or so.
I'm not sure if this is because it's a new install or going to be a persistent problem.
Has anyone found out why this is or have a solution to fix it?
I don't want to disable multitasking. I'm probably also not going to root the device anytime soon just in case this is a real problem and I need to RMA it. I have disabled Wi-Fi when the device sleeps.

Actually, now that I'm looking at the screenshots again, it seems the battery stats aren't reporting the other apps I was using. Maybe it all got combined into Android OS somehow? I checked my Shield again and the games and apps I was using are shown and the % of Android OS seems to be going down.
I hope this was a fluke, but it'll be a few more days before I know for sure.

It seems it might have just been a weird glitch in the way the battery stats was shown.
Today I checked my Shield and it only used 3% battery life overnight with Android OS only using 9%. All the other apps also stayed visible on the list of apps.

Last night I turned on "Keep Wi-Fi on during sleep" again since it's actually pretty annoying when I'm trying to download something on the Shield and it gets cancelled when it goes to sleep.
I had 30% battery life when I went to bed and the Android OS battery usage was a low 12%.
I woke up with the Shield having 30% battery life still, but the Android OS battery usage shot up from 12% to 45%.
I went out for 30min and came back and the Shield had 32% battery life.
I used it for a couple of minutes and battery life dropped to 25%.
I have no idea what the heck is going on with the battery stats. I'm probably going to see what happens tonight and if the Android OS starts to get really high again I'll then turn off "Keep Wi-Fi on during sleep" for a few nights to see if that's really what's causing it.

Outrager;541903Last night I turned on "Keep Wi-Fi on during sleep" again since it's actually pretty annoying when I'm trying to download something on the Shield and it gets cancelled when it goes to sleep.
I had 30% battery life when I went to bed and the Android OS battery usage was a low 12%.
I woke up with the Shield having 30% battery life still said:
No live wallpaper? Or gpu rendering in dev options?
Click to expand...
Click to collapse

mudflap2.0 said:
No live wallpaper? Or gpu rendering in dev options?
Click to expand...
Click to collapse
Using the stock wallpaper. I think it's just an image.
Force GPU rendering is off. All the Dev options are default.

I'm interested to know if this ever gets resolved. I'm experiencing the same thing, just a tad more extreme. Android OS taking 95% battery. Been on the wallcharger more than a day, i wake it up and its at 45% charge. Stock, non-rooted, no Dev options enabled. I have a sneaking suspicion its related to Google Play services, but have no way of knowing.
Sent from my Nexus 5 using Tapatalk

brianj1970 said:
I'm interested to know if this ever gets resolved. I'm experiencing the same thing, just a tad more extreme. Android OS taking 95% battery. Been on the wallcharger more than a day, i wake it up and its at 45% charge. Stock, non-rooted, no Dev options enabled. I have a sneaking suspicion its related to Google Play services, but have no way of knowing.
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
So after doing a factory reset and getting the same results I finally decided to just unlock my bootloader and root the Shield. I did contact my 3rd party insurance company first to make sure they would still cover any hardware faults if I did that.
Anyway, unlocking the bootloader meant a factory reset too. Well instead of Android OS taking up the majority % of the battery life it became Wi-Fi that was doing it.
I thought it might be the battery so I ran it down to 0% then while charging it back up I just said, "Screw it," and started fresh using the Recovery OS Image from the Nvidia site.
SO FAR, it seems to be much more normal in terms of the battery stats.
What's weird is Android OS and Android System have swapped positions compared to the way my Nexus 4 is.
It'll probably be another day or two when I use the Shield some more before I can make sure it's all better.
Update:
Nevermind.
Overnight Wi-Fi and Android OS shot to the top of the battery usage.

Outrager said:
So after doing a factory reset and getting the same results I finally decided to just unlock my bootloader and root the Shield. I did contact my 3rd party insurance company first to make sure they would still cover any hardware faults if I did that.
Anyway, unlocking the bootloader meant a factory reset too. Well instead of Android OS taking up the majority % of the battery life it became Wi-Fi that was doing it.
I thought it might be the battery so I ran it down to 0% then while charging it back up I just said, "Screw it," and started fresh using the Recovery OS Image from the Nvidia site.
SO FAR, it seems to be much more normal in terms of the battery stats.
What's weird is Android OS and Android System have swapped positions compared to the way my Nexus 4 is.
It'll probably be another day or two when I use the Shield some more before I can make sure it's all better.
Update:
Nevermind.
Overnight Wi-Fi and Android OS shot to the top of the battery usage.
Click to expand...
Click to collapse
Not more than a week and a half ago, I did a factory reset on my Shield, for reasons unrelated. I was running into problems where the thing would randomly reboot in the middle of playing games. I attributed it to issues related to moving games to SD.
After the reset, and re-install of everything it has been running rock solid, it's only past few days this battery drain started being an issue. Last night I went through and unchecked 'show notifications' for any and all downloaded games, not sure if that makes a difference really. The thing sat on the charger an entire night, and in the morning it was still only at 52% charge, Android OS still being the top offender.
I've turned location OFF, and set WIFI to off during sleep. Going to see how the battery looks after a few more hours. If I was more adventurous I'd root, and install a wakelock detector, but I'm just not that motivated. I'm hoping if I ignore it the problem will work itself out eventually. Not sure what to think, none of my other Android tablets or phone are experiencing this phenomenon.

brianj1970 said:
Not more than a week and a half ago, I did a factory reset on my Shield, for reasons unrelated. I was running into problems where the thing would randomly reboot in the middle of playing games. I attributed it to issues related to moving games to SD.
After the reset, and re-install of everything it has been running rock solid, it's only past few days this battery drain started being an issue. Last night I went through and unchecked 'show notifications' for any and all downloaded games, not sure if that makes a difference really. The thing sat on the charger an entire night, and in the morning it was still only at 52% charge, Android OS still being the top offender.
I've turned location OFF, and set WIFI to off during sleep. Going to see how the battery looks after a few more hours. If I was more adventurous I'd root, and install a wakelock detector, but I'm just not that motivated. I'm hoping if I ignore it the problem will work itself out eventually. Not sure what to think, none of my other Android tablets or phone are experiencing this phenomenon.
Click to expand...
Click to collapse
Setting Wi-Fi to turn off during sleep does sort of help keep Wi-Fi battery usage down, but I just find it so inconvenient.
I just rooted and have BetterBatteryStats installed. The Kernel Wakelock category doesn't show anything for some reason and nothing unusual about the Partial Wakelocks.
The only unexplained thing is a Process called migration/0 that has been on for 15h 15m 6s even though the device only shows an uptime of 13h 1m 26s. A quick Google search says, "The migration kernel process distributes workload across CPU cores. You should have one migration process per processor core." so I guess it's normal?
Also, while typing this, my Android OS battery usage shot up to 80% and my Wi-Fi is now at 10% which is still higher than the Screen on usage of 7%.
I also just used ROM Toolbox Pro to freeze all the Nvidia system apps, like NVStats and TegraZone, to see if that will help at all.
I have this feeling that it is Android 4.4.2 that is causing the problems and I hope Nvidia at the very least updates to 4.4.4.

I've been reading some more articles and there are some that point to the external SD card being the culprit of the battery drain.
It seems to be that Media Scanner is trying to constantly scan the external SD card.
I'm not 100% sure if it is the cause because on my side I don't have the Mediaserver using any battery.
The next time I fully charge my Shield I might try removing the MicroSD card to see if that is causing it.

Outrager said:
I've been reading some more articles and there are some that point to the external SD card being the culprit of the battery drain.
It seems to be that Media Scanner is trying to constantly scan the external SD card.
I'm not 100% sure if it is the cause because on my side I don't have the Mediaserver using any battery.
The next time I fully charge my Shield I might try removing the MicroSD card to see if that is causing it.
Click to expand...
Click to collapse
I'm not sure removing the SD card changed anything.
I did notice a process in BetterBatteryStats called migration/0 that is very high usage and I have no idea what it is for or how to stop it.

Okay, so I think I've found the cause of the high Android OS battery usage.
First my solution:
In the Settings -> Accounts -> Google -> (your account)
Leave Sync enabled, but ONLY check "App Data", "Chrome", and "Google Photos Auto Backup". Leave everything else un-checked.
Set Wi-Fi to turn off when the Shield goes to Sleep.
*I haven't bothered to test individual sync option, but those are just the 3 I left checked. You can try it yourself to see which one is the real culprit. My best guess is it is Calendar syncing that is causing the problems.
*Do not just disable Sync. I found that did not help at all. I don't know why.
*I don't know if it's my router or the Shield, but Wi-Fi also uses way too much battery when asleep. I can see that it is going into deep sleep too. Setting Wi-Fi to turn off when the Shield goes to sleep drastically lowers the Wi-Fi battery usage. Fun fact: The Wi-Fi stays on for 20 minutes after you turn off the screen before turning itself off.
After un-checking a bunch of the syncing options my Android OS battery usage went down to 20% for a 20 hour period compared to the 70% or so it was using the day before I did it.
The "migration/0" process no longer shows up at the very top in BetterBatteryStats. If it is showing up, it is <10sec of usage.
After 20 hours, with about 35min of 3D gaming and 40min screen on time, the Android OS battery usage was using 20% with 30m30s of CPU Total. I also spent about 10min transferring files using AirDroid then moving them to the SD card.
The battery life dropped from 100% -> 84% in those 20 hours. I think I would have had battery life closer to the Anandtech review if I was just doing 1 thing consecutively and not gaming then using the Wi-Fi to move files. I might try that one day, but most likely not.
I hope this helps for everyone having the same problem as me.

Outrager said:
Okay, so I think I've found the cause of the high Android OS battery usage.
First my solution:
In the Settings -> Accounts -> Google -> (your account)
Leave Sync enabled, but ONLY check "App Data", "Chrome", and "Google Photos Auto Backup". Leave everything else un-checked.
Set Wi-Fi to turn off when the Shield goes to Sleep.
*I haven't bothered to test individual sync option, but those are just the 3 I left checked. You can try it yourself to see which one is the real culprit. My best guess is it is Calendar syncing that is causing the problems.
*Do not just disable Sync. I found that did not help at all. I don't know why.
Click to expand...
Click to collapse
Thanks for this pointer.
I was also facing significant CPU consumption by the real time kernel process migration/0 on my Googy-Max-1.7.9 kernel.
I turned off the calendar sync and this seems to have fixed the issue. Now I am only syncing App Data, Contacts, Gmail and the others [browser, Calendar, Chrome, Chrome Beta and People details] are off.
Related thread: http://superuser.com/questions/416779/linux-migration-n-high-cpu-consumption

Unsolve battery drain

Hi everyone,
I need some advice from the community. I've had my XT925 for almost 2 years now, and in the last 6-8 moths I've been having weird battery drain that I couldn't solve. It started back on JB a while ago, and I thought "oh hell, KK is around the corner, it'll go away when I wipe everything". I was mistaken: I first tried the soak test leaked KK, and had the same erratic behaviour. And when the final release became available, I reflashed a full stock JB then flashed the zip OTA posted in general. I'm now on 4.4.2 stock moto kitkat.
I hardly last a full day, without a heavy usage. Many SMS (10-50), maybe 1-2 MMS, wifi ON most of the time at work, phone forced to 3G (4G cover is sporadic and when I turn it on I have a lot of 3g/4g switches). In the last week, I've frozen nearly every app I had with TB, to (hopefully) isolate the ones that drain too much battery. No luck so far.
Today I've decided to take a series of screenshot so maybe someone can help me troubleshoot what's wrong. They are attached to this post. I don't see anything out of the ordinary, but I'm no expert, so maybe someone can elighten me on any abnormality. I had roughly 40 min of vocal call today, which is a lot compared to my usual usage (average, maybe 3-5 min a day of voice call). This may have contributed to drain slightly more today, but there is not so much difference at the end of the day.
Basically, I recall lasting easily 1..5 days with the phone stock out of the box. Now, it's hard to reach >12h. I thought maybe the battery was dying (although *#*#4636#*#* said it was in good shape) so i replaced the battery by a brand new Moto one last week. There was absolutely no change at all.
So... here you go: any idea on what could be causing the drain ? Obviously I've cleared cache and wiped data many times already, and I'd like to avoid doing it again and again and again. Note that on the screenshot, there is many apparent time with bad signal. I have no idea why it shows like this since I'm always 3-4 bars at work. This is weird, and came with KK (JB sowed green signal at the same place).
Thanks for your help!
edit: just swa my thread title is missing a "d"... but cannot edit.

CoinCoin88 said:
Hi everyone,
I need some advice from the community. I've had my XT925 for almost 2 years now, and in the last 6-8 moths I've been having weird battery drain that I couldn't solve. It started back on JB a while ago, and I thought "oh hell, KK is around the corner, it'll go away when I wipe everything". I was mistaken: I first tried the soak test leaked KK, and had the same erratic behaviour. And when the final release became available, I reflashed a full stock JB then flashed the zip OTA posted in general. I'm now on 4.4.2 stock moto kitkat.
I hardly last a full day, without a heavy usage. Many SMS (10-50), maybe 1-2 MMS, wifi ON most of the time at work, phone forced to 3G (4G cover is sporadic and when I turn it on I have a lot of 3g/4g switches). In the last week, I've frozen nearly every app I had with TB, to (hopefully) isolate the ones that drain too much battery. No luck so far.
Today I've decided to take a series of screenshot so maybe someone can help me troubleshoot what's wrong. They are attached to this post. I don't see anything out of the ordinary, but I'm no expert, so maybe someone can elighten me on any abnormality. I had roughly 40 min of vocal call today, which is a lot compared to my usual usage (average, maybe 3-5 min a day of voice call). This may have contributed to drain slightly more today, but there is not so much difference at the end of the day.
Basically, I recall lasting easily 1..5 days with the phone stock out of the box. Now, it's hard to reach >12h. I thought maybe the battery was dying (although *#*#4636#*#* said it was in good shape) so i replaced the battery by a brand new Moto one last week. There was absolutely no change at all.
So... here you go: any idea on what could be causing the drain ? Obviously I've cleared cache and wiped data many times already, and I'd like to avoid doing it again and again and again. Note that on the screenshot, there is many apparent time with bad signal. I have no idea why it shows like this since I'm always 3-4 bars at work. This is weird, and came with KK (JB sowed green signal at the same place).
Thanks for your help!
edit: just swa my thread title is missing a "d"... but cannot edit.
Click to expand...
Click to collapse
i would get gsam battery monitor with the root companion (second app) so you can get a better idea of whats going on. some shots of the app view screen, then change the view to view time held awake, then a couple shots of the details on the highest ones.
you can then get an app called unbounce that can limit the wakelocks, but it requires some reading so you dont break anything.
if you could take shots in English that would be great, otherwise i wont be able to help much with the diagnosis.

I was trying not to rely on wakelock limiting apps, as there's no reason for the drop from 1.5 (2) days to 12 h, with all custom apps frozen. I didn't know unbounce but the same goes for Greenify. I'll try the widget you mentioned and report back.
edit: yup i'll switch to english for the shots next time.

Oh and I forgot to mention this: from time to time, the drain won't be so apparent (e.g. 40% remaining after 12-15 h) and in a matter of minutes, the phone will drop to 10-12%. However it hasn't happened sicne I last turned off 4G, so maybe it was due to constant 3g/4g switches.

CoinCoin88 said:
Oh and I forgot to mention this: from time to time, the drain won't be so apparent (e.g. 40% remaining after 12-15 h) and in a matter of minutes, the phone will drop to 10-12%. However it hasn't happened sicne I last turned off 4G, so maybe it was due to constant 3g/4g switches.
Click to expand...
Click to collapse
no doubt, in weak and especially no signal areas, it will burn through battery like crazy.

Here it as, after a nearly complete discharge. Phone unplugged around 10am, 12h15 later I'm at 10% remaining, with not so much usage. Screenshots are attached. What's weird is that in the last 1h30 the phone has been off wifi (slider "Wi-Fi" is off in settings) but battery status still shows a connected wifi. However you can clearly see a huge drain due to wifi being off and 3g being on (it's the only part of the day it's been using cellular data: I was at the restaurant therefore no wifi). Possibly locatin services using the wifi even though it was disabled ? Anyway I'm not sure this could cause such a quick drain...
edit: as far as the signal bar color in battery status, I've found that grey-yellow stands for "signal 3/4", so it's rather good (solid green is signal 4/4). So it's probbaly not that either...

Ooops forgot the "time held awake" shots. It's definitely Google services messing around, but what... (details of Google services in previous post)

CoinCoin88 said:
Ooops forgot the "time held awake" shots. It's definitely Google services messing around, but what... (details of Google services in previous post)
Click to expand...
Click to collapse
some of those push the limits of what i would like to see personally, but none appear out of control to me.
im really not sure how you would go about taming some of that down though, without using a couple apps you dont want to use.
imo, you would need to control some of the wakelocks, and/or disable some of the receivers you done use.
the couple "nlp" wakelocks from google are going to account for a good bit of its waking. nlp is nothing more than google using your location information to build a database from it.
here is whats known about some of the more common offenders, and the testing results from limiting them.

That's what I feared... I'm usually not that bad with messing with the phone, and couldn't see anything obvious either. I've disabled "using wifi to locate" in wifi settings, I'll see how this drops the nlp wakelocks, for starters.
If anyone has a better idea, please don't hesitate
Sent from my RAZR HD using XDA Free mobile app

CoinCoin88 said:
That's what I feared... I'm usually not that bad with messing with the phone, and couldn't see anything obvious either. I've disabled "using wifi to locate" in wifi settings, I'll see how this drops the nlp wakelocks, for starters.
If anyone has a better idea, please don't hesitate
Sent from my RAZR HD using XDA Free mobile app
Click to expand...
Click to collapse
i have use quite a few of the more popular battery saving apps over the years. i just came across this one yesterday. its shaping up to be the best i have used to date. i wasnt using my phone except for a few minutes this morning, and it went 5 1/2 hours and was still @ 100%.
i also use greenify with root + exposed.

did you disable FAST DORMANCY? I have done it while on JB ? IT did not cause any prob.

Haven't disabled it, mostly because I've never been able to determine if it was being used by carriers in France or not. I've read somewhere that it wasn't, but the source was hardly documented. I've tried to disable it in JB however, and did not see any improvement.
Right now I've disabled Google Now and location history things. I'm trying to reduce the wakelocks as much as I can using settings available from stock rom (and understand at the same time what was causing them). Battery drain is still high, but I'm testing things every 10 min or so, so it's not really representative. I'll update here when I have a better idea of what's going on.

Another thing of interest is xposed with new module called Unbounce. There is a thread for it. All about minimizing wake locks

A few thoughts so far. I haven't tried Greenify or Unbounce yet, this will be the "final stage". For now I'm trying to minimize wakelocks as much as possible without installing third-party apps.
Here are a quick review of what I've found (NB: in the following I translated the menu names myself from french to english and didn't check their actual name... but it shouldn't be too hard to figure out which ones I'm referring to if the name is not exactly right):
1) Disabled Google Now and all "Google Location settings" (i.e. "Update location" and "Location history", found within "Google settings" in the drawer).
2) Set location settings to "minimize battery", that is with network and wi-fi.
3) In wi-fi advanced settings, disabled "search always available"
4) Locked the phone to 2G/3G only, because 4G coverage from my carrier (Free Mobile for the frenchies here ) is erratic at best, and caused many 3G/4G switches
5) Some "light" de-bloat (froze all Google apps I'm not using). At first I froze all my apps to mimick a fresh stock system, but there were really not that much difference.
Note that all the tests were ran (mostly) in the same location, on different days, so signal quality should be rather constant (and good) and therefore is not acting as a confounding factor in my tests.
Whats happening when 3G and Wi-Fi are both off ?
Obviously, disabling 3G and wifi gives a very good battery life. I'm talking about something like 2h screen-on and probably 30-40% after a full day (9am to midnight, roughly). I'll double check the exact values for this and update this post with a screenshot asap (= in the upcoming days). With this setting, wakelocks actually correspond to screen-on time. So it's probably the best one can achieve.
edit: 1h of voice communication, 1h15 of screen-on time, 10-15 sms, 1 received MMS (had to enable 3G a few seconds for that of course) => see Screenshot_2014-10-27-23-22-14.png
The decrease at the end corresponds to wifi+3G when I got back home and started using the phone "heavily". Roughly, 40% decrease in 12h. That is what I call a good battery life. Notice how the wakelocks closely match the screen on periods.
Whats happening when 3G is ON and Wi-Fi is OFF
We've discussed a bit the "fastdormancy" thing earlier here. Spending a whole day on 3G made the "modem fastdormancy" process drain a high share of battery (10-20% ? Can't remember exactly, but it was in the top-5 list of draining apps, and had a big wakelock time). Further proof that my carrier doesn't support it. I've therefore edited my build.prop to set
ro.mot.ds.fastdormancy.disable=true
Click to expand...
Click to collapse
After that, the process was not found anymore in high-draining apps, and battery life was a little better (again, no values here, I'll update in a few days after I run the tests again and double-check everything).
Can't say much about Google location, but I'd say most requests were not executed.
Whats happening when 3G is OFF and Wi-Fi is ON
Wi-Fi at work did not cause any interesting drain. The phone sat there and was connected all day-long. There were probably a few Google requests to determine its location, with some nlpwakelock, but not really interesting.
What was really interesting was the behaviour outside my workplce (e.g. on the street). I have in my "known networks" some wi-fi hotspots (FreeWifi) that are enabled with my DSL provider: they provide me with codes from my contract that I can use in the street if any other of their customer has a wi-fi enabled on their modem (their is a dedicated SSID broadcasted from their modem). The phone connected automatically whenever it detected this SSID (which was... really often), but the captive portal (to enter credentials) was not filled, because the phone was in my pocket. This caused HUGE wakelocks and drained the battery incredibly fast. I'm talking about draining 50% in an hour or so. I could even feel the phone warming up in my pocket.
So, conclusion here: I think Wi-Fi could be a major cause of battery drain if you have some fav SSID that require credentials through a captive portal.
I'll update in a few days if I find anything else, and to add values to what i've stated here.
Hope that helps!

Note 3 battery drain...

Ok so i've seen a few threads between here and other websites regarding the Note 3s battery issues but felt the need to make my own as I still haven't found any kind of solution.
I purchased my Note 3 N9005 (I live in the UK) around a month ago and ever since my battery has been terrible ever since. I am basing this on the fact that I have owned a Note 3 twice previously (I managed to get one just after they came out for a reasonable price second hand and also owned one around 6 months ago for a while) and battery life on those two devices were fantastic.
Around a week and a half ago I decided to root and try a couple of roms to see if it would make any difference after making sure it wasn't my SD card causing the problem and couldn't really try anything else. After going from the CMRemix, CM11 and Echoe 5.0 not a great deal changed on each after using each one for a couple of days, every day my battery gets hammered by 'android system' and 'android os'. After seeing a post about it I have gone back to stock touchwiz using the 4.4.2 Nordic firmware. This made no difference either.
I have posted some pictures of my battery life since getting up this morning. I always have sync turned off and my screen is always just above the minimum brightness. Im on Wifi a lot between work and home which in theory should use less power. I've been playing contest of champions quite a bit recently which I would expect to be a battery drainer but it is still beaten by my screen and this android system and OS combo. I also don't get why battery dropped around 18% (30 something to the 15% warning) in around 20 minutes which is the red line on the battery graph. Last Friday I went to sleep with my battery on around 78%, when I woke up it had dropped to 42% with no apps left running.
I'm literally out of ideas. I've tried everything i've seen on forums and it hasn't worked. I've owned an S5, m8 and z2 but ended up coming back to a note because they are simply fantastic phones. I am however seriously considering selling this and getting a different phone if I don't figure this out soon though. Can anyone help or is this simply an unsolvable problem caused by horrendous software implementation, or am I being stupid and should be content with 13 hours irregular battery life???

3mbers said:
Ok so i've seen a few threads between here and other websites regarding the Note 3s battery issues but felt the need to make my own as I still haven't found any kind of solution.
I purchased my Note 3 N9005 (I live in the UK) around a month ago and ever since my battery has been terrible ever since. I am basing this on the fact that I have owned a Note 3 twice previously (I managed to get one just after they came out for a reasonable price second hand and also owned one around 6 months ago for a while) and battery life on those two devices were fantastic.
Around a week and a half ago I decided to root and try a couple of roms to see if it would make any difference after making sure it wasn't my SD card causing the problem and couldn't really try anything else. After going from the CMRemix, CM11 and Echoe 5.0 not a great deal changed on each after using each one for a couple of days, every day my battery gets hammered by 'android system' and 'android os'. After seeing a post about it I have gone back to stock touchwiz using the 4.4.2 Nordic firmware. This made no difference either.
I have posted some pictures of my battery life since getting up this morning. I always have sync turned off and my screen is always just above the minimum brightness. Im on Wifi a lot between work and home which in theory should use less power. I've been playing contest of champions quite a bit recently which I would expect to be a battery drainer but it is still beaten by my screen and this android system and OS combo. I also don't get why battery dropped around 18% (30 something to the 15% warning) in around 20 minutes which is the red line on the battery graph. Last Friday I went to sleep with my battery on around 78%, when I woke up it had dropped to 42% with no apps left running.
I'm literally out of ideas. I've tried everything i've seen on forums and it hasn't worked. I've owned an S5, m8 and z2 but ended up coming back to a note because they are simply fantastic phones. I am however seriously considering selling this and getting a different phone if I don't figure this out soon though. Can anyone help or is this simply an unsolvable problem caused by horrendous software implementation, or am I being stupid and should be content with 13 hours irregular battery life???
Click to expand...
Click to collapse
Thats just not normal, try to use app wakelock detector (from playstore) to see what apps are currently running, you can also go to the device app manager and then go to "running apps" and then see what apps are running on backround, that would give you a general idea of where are the battery draining apps. Then all you have to do is to disable/freeze them , using the inbuilt disable option under the app settings or using a third party program like app quarantine (from playstore). Note that i also recommend you disabling apps you dont use , like for example samsung apps etc.

diegonnc said:
Thats just not normal, try to use app wakelock detector (from playstore) to see what apps are currently running, you can also go to the device app manager and then go to "running apps" and then see what apps are running on backround, that would give you a general idea of where are the battery draining apps. Then all you have to do is to disable/freeze them , using the inbuilt disable option under the app settings or using a third party program like app quarantine (from playstore). Note that i also recommend you disabling apps you dont use , like for example samsung apps etc.
Click to expand...
Click to collapse
Thanks for the advice. I even ordered a new battery from samsung which arrived this morning but that doesn't seem to have made much difference either. If I hadn't seen similar cases to mine i'd think my phone was broken but honestly I'm starting to think that is down to samsung software and won't ever be fixed. It's a shame because the Note 3 is the best phone i've owned but ill be steering clear of samsung devices in the future

3mbers said:
Thanks for the advice. I even ordered a new battery from samsung which arrived this morning but that doesn't seem to have made much difference either. If I hadn't seen similar cases to mine i'd think my phone was broken but honestly I'm starting to think that is down to samsung software and won't ever be fixed. It's a shame because the Note 3 is the best phone i've owned but ill be steering clear of samsung devices in the future
Click to expand...
Click to collapse
Use Greenify to hibernate apps..it will save ur battery..

Greenify is a big help. Also use Titanium Backup to freeze or uninstall anything with the word 'Samsung' in it that you don't need (they're terrible, in my experience).
Some other things that can help are turning off GPS and Bluetooth when you don't need them, raising your wi-fi scan interval if you typically leave wi-fi on in areas you're not connected, using an app like AutoStarts to control what apps wake up when, and you should check what apps you have auto-syncing, and how often. If you don't need gmail and facebook to sync every 5 minutes (just an example), then change the interval. And unless you spent a good bit of time playing it before you took those screenshots, I would highly recommend ditching that Champions game.
Aside from that, another thing you might want to consider is trying a different kernel. Some kernels are just bad on battery life.
I'm on my original, stock battery, and I get 22-26 hours typically, with moderate usage, and anywhere from 6-10+ hours of screen on time. Right now I'm sitting at 18h5m29s with 5h26m3s screen on, with 27% battery left.

Morningstar said:
Greenify is a big help. Also use Titanium Backup to freeze or uninstall anything with the word 'Samsung' in it that you don't need (they're terrible, in my experience).
Some other things that can help are turning off GPS and Bluetooth when you don't need them, raising your wi-fi scan interval if you typically leave wi-fi on in areas you're not connected, using an app like AutoStarts to control what apps wake up when, and you should check what apps you have auto-syncing, and how often. If you don't need gmail and facebook to sync every 5 minutes (just an example), then change the interval. And unless you spent a good bit of time playing it before you took those screenshots, I would highly recommend ditching that Champions game.
Aside from that, another thing you might want to consider is trying a different kernel. Some kernels are just bad on battery life.
I'm on my original, stock battery, and I get 22-26 hours typically, with moderate usage, and anywhere from 6-10+ hours of screen on time. Right now I'm sitting at 18h5m29s with 5h26m3s screen on, with 27% battery left.
Click to expand...
Click to collapse
Trying a custom kernel is something else I'd though about. It's crazy that you've got those battery stats. My brightness is always near minimum and I only get 4 hours on a good day. Judging from posts I've read those android os and system percentages are accurate for the note 3 nowadays. I never have sync turned on so that can't be the issue. I've got this phone on ebay now so if I don't sort this out in the next couple of days I'll be moving on unfortunately, bit sad as this is the best phone I've owned
Sent from my SM-N9005 using XDA Free mobile app

3mbers said:
Trying a custom kernel is something else I'd though about. It's crazy that you've got those battery stats. My brightness is always near minimum and I only get 4 hours on a good day. Judging from posts I've read those android os and system percentages are accurate for the note 3 nowadays. I never have sync turned on so that can't be the issue. I've got this phone on ebay now so if I don't sort this out in the next couple of days I'll be moving on unfortunately, bit sad as this is the best phone I've owned
Sent from my SM-N9005 using XDA Free mobile app
Click to expand...
Click to collapse
I'm in the same boat. Stock 4.3 with tons of apps frozen, greenify doing its thing and Google Play Services tamed as it was draining the battery. To me everything looks ok in WLD but I have noticed that something called 1013 which is always at the top with most amount of wakes, is that system audio? I also have screen brightness on minimum, powersaving mode on, bluetooth and gps off, sync on and most of the time usually on wifi networks.
I have managed 6hrs screen on before but when using device moderately over 2 days I get 4 hrs screen on time at best, usually 3 or 2.5 hrs.
The 6 hrs was managed when I watched 3 movies in a row, it seems sleep takes more than it should? Wake ups are a problem?

Check out Shinto kernel [emoji6]

ErOR22 said:
I'm in the same boat. Stock 4.3 with tons of apps frozen, greenify doing its thing and Google Play Services tamed as it was draining the battery. To me everything looks ok in WLD but I have noticed that something called 1013 which is always at the top with most amount of wakes, is that system audio? I also have screen brightness on minimum, powersaving mode on, bluetooth and gps off, sync on and most of the time usually on wifi networks.
I have managed 6hrs screen on before but when using device moderately over 2 days I get 4 hrs screen on time at best, usually 3 or 2.5 hrs.
The 6 hrs was managed when I watched 3 movies in a row, it seems sleep takes more than it should? Wake ups are a problem?
Click to expand...
Click to collapse
Yeah something has definitely gone wrong at the core of the phones software, especially when different roms and stock firmware builds are making no difference at all. I flashed AEL kernel yesterday so i'm seeing how that goes today. I'll post screenshots when i get home from work, so far my batteries only dropped 10% in 3 hours but thats with 30mins screen on time.

Had similar battery draining issues, I froze Unified Daemon (EUR) this appears to have fixed it.

I have faced this issue after my phone got the last update.
Even the android system was consuming more than the screen.
I removed Google account and put it back again but this time i limited the Google features that do the sync to the required only, gave a full recharge, the second day the android system consumption decrease a bit.
I gave it a full recharge cycle each day for the next 3 days and later it came back to normal.
I hope that helps.
Bashar Al Jaloudi
Sent from my SM-N900 using XDA Free mobile app

I had the same problem. for months and no solution anywhere. what I did was to downgrade back to jellybean. this is the only thing that seemed to stop the drain. though I still believe my battery was much better on the initial jellybean.
Sent from my SM-N9008 using XDA Free mobile app

SM-G930F huge battery drain (even after switching phones)

I've bought the international version of the S7 (the only one available here in Portugal) which is the SM-930F on the last tuestday (2016-09-16).
During the wednesday, I've noticed that the battery drained really fast, but I thought that it was because of the whole first-day configuration / installing 50 apps thing.
On thursday (yesterday), I removed it from the charger at 8h30, barely used it, and at around 13h00 it had 44% battery. I don't have a lot of background syncing or anything like that, just the normal I've used on other phones before the S7.
I've read somewhere from people that had similar problems and they said a factory reset solved. I did a factory reset but the battery kept draining at the same rate.
So, at around 20h30 I went to the store and asked for a replacement. Exactly the same model and color.
I went home, installed all apps and updated everything so I could test it today without updates and downloads. I didn't restore any settings from previous installations.
Today I took it off from the charger again at around 9h00, it's 14h30 and it has 64% and I barely touched it! I've checked some stuff at lunch time for like 10min, that's all.
What can possibly be wrong here? Everyone on the internet says that this phone's battery life is one of the best out there, but it's draining faster than any of my previous phones!
Both the original and replacement phones were sealed in the box.
Any ideas?
Some screenshots of installed apps and battery usage:
https://goo.gl/photos/isCRB88NgZhShe1H8
UPDATE:
For those that come to this thread looking for answers to the same problem, read my update here:
http://forum.xda-developers.com/showpost.php?p=68758433&postcount=10

METEMEDO said:
I've bought the international version of the S7 (the only one available here in Portugal) which is the SM-930F on the last tuestday (2016-09-16).
During the wednesday, I've noticed that the battery drained really fast, but I thought that it was because of the whole first-day configuration / installing 50 apps thing.
On thursday (yesterday), I removed it from the charger at 8h30, barely used it, and at around 13h00 it had 44% battery. I don't have a lot of background syncing or anything like that, just the normal I've used on other phones before the S7.
I've read somewhere from people that had similar problems and they said a factory reset solved. I did a factory reset but the battery kept draining at the same rate.
So, at around 20h30 I went to the store and asked for a replacement. Exactly the same model and color.
I went home, installed all apps and updated everything so I could test it today without updates and downloads. I didn't restore any settings from previous installations.
Today I took it off from the charger again at around 9h00, it's 14h30 and it has 64% and I barely touched it! I've checked some stuff at lunch time for like 10min, that's all.
What can possibly be wrong here? Everyone on the internet says that this phone's battery life is one of the best out there, but it's draining faster than any of my previous phones!
Both the original and replacement phones were sealed in the box.
Any ideas?
Some screenshots of installed apps and battery usage:
https://goo.gl/photos/isCRB88NgZhShe1H8
Click to expand...
Click to collapse
Hi
Most of times battery consumption is due to settings , WIFI , e-mail sync , location , rogue app , facebook..... review them......maybe do a factory reset , install nothing and see how it behaves , install app in smaller lots to see if there an increase on battery drainage , if you where root there is an app that is great to see exactly who is the culprit
http://forum.xda-developers.com/showthread.php?t=1179809
Anyhow also check some of this threads for ideas
http://forum.xda-developers.com/galaxy-s7/how-to/battery-life-discussion-t3316305
http://forum.xda-developers.com/galaxy-s7/how-to/standby-drain-2-8-hours-wifi-bit-4g-t3416864

MAX 404 said:
Hi
Most of times battery consumption is due to settings , WIFI , e-mail sync , location , rogue app , facebook..... review them......maybe do a factory reset , install nothing and see how it behaves , install app in smaller lots to see if there an increase on battery drainage , if you where root there is an app that is great to see exactly who is the culprit
http://forum.xda-developers.com/showthread.php?t=1179809
Anyhow also check some of this threads for ideas
http://forum.xda-developers.com/galaxy-s7/how-to/battery-life-discussion-t3316305
http://forum.xda-developers.com/galaxy-s7/how-to/standby-drain-2-8-hours-wifi-bit-4g-t3416864
Click to expand...
Click to collapse
If it was a rogue app, wouldn't that show up in battery usage?
For apps, syncing, location and network, I have the exact same settings I had in my previous Note 4 and LG G2, and nothing like this ever happened.
Location is on all the time, I'm connected to my company's WiFi, 4G always on (overriden by the WiFi most of the time).
The only thing I didn't have in those phones was the "screen always on" of the S7 that shows the time, which reviewers say that it's so optimized that it barely makes a difference.
I wouldn't be complaining if it were draining a bit faster than the Note 4 or the old LG G2, but it's actually draining like 4-5 times faster!
Yesterday I had both the G2 and the S7 with me, with all the same apps, with a SIM card from the same network/account.
When I reached the store, the S7 had almost critical battery, while the G2 had around 80%...
The S7 didn't get hot or anything.
I will wait a couple days to see if it improves, but it's extremely disappointing, after spending 730€ on a new phone (around $820).

METEMEDO said:
If it was a rogue app, wouldn't that show up in battery usage?
For apps, syncing, location and network, I have the exact same settings I had in my previous Note 4 and LG G2, and nothing like this ever happened.
Location is on all the time, I'm connected to my company's WiFi, 4G always on (overriden by the WiFi most of the time).
The only thing I didn't have in those phones was the "screen always on" of the S7 that shows the time, which reviewers say that it's so optimized that it barely makes a difference.
I wouldn't be complaining if it were draining a bit faster than the Note 4 or the old LG G2, but it's actually draining like 4-5 times faster!
Yesterday I had both the G2 and the S7 with me, with all the same apps, with a SIM card from the same network/account.
When I reached the store, the S7 had almost critical battery, while the G2 had around 80%...
The S7 didn't get hot or anything.
I will wait a couple days to see if it improves, but it's extremely disappointing, after spending 730€ on a new phone (around $820).
Click to expand...
Click to collapse
Battery drainage is a Bit** , some time is hard to find out what is going on and you need to be patient and methodical
to your questions
If it was a rogue app, wouldn't that show up in battery usage?
Not necessary , may be is a process and do not show in there , most times you need a better app (BBS the link i gave you) and be root to see those process , or by discarding apps to find out
For apps, syncing, location and network, I have the exact same settings I had in my previous Note 4 and LG G2, and nothing like this ever happened.
Different phones , not necessarily the apps behave the same in different phones
Location is on all the time, I'm connected to my company's WiFi, 4G always on (overriden by the WiFi most of the time).
Try different settings and see if they make a difference , see what apps are using location , do not have wifi on all the time during sleep......
In my case i do not have even half of that drainage , of course we all use the phone in different ways and have different apps......as i said is a royal pain in the a** and need to be patient and methodical to find out if is a real hardware problem or a configuration problem

After reading this,
https://www.reddit.com/r/GalaxyS7/c..._s7_edge_battery_drains_20_overnight_8_hours/
I've decided to wait for a few days to see if it improves. The poster seemed to have the same problem I have and he said it stabilized after a few days.
If he problem persists, I will try the things you said.
Thank you.

Maybe you can install Better Battery Stats and wait for it to give you some answers.

I would suspect that the phone has trouble connecting to network, WiFi or mobile network or tries to constantly fix to gps signals. A constant search for better connection results problems like yours. If you can, try another operator sim for a day, or try another location.
Perhaps do not use wifi for a day to rule out bad compatibility with your routers settings.
My S7 SM-930F do not lose ever one percent per hour if left unused with everything on and no powersaving.

Did you use Memory card ? I had similar issue on S4. There was damaged file and phone tried read it whole time.

I had the similar problem which was caused by Email App. Try to install Wakelock Detector Lite and see which app drains the battery most. In my case, Email app was preventing phone to enter deep sleep mode and it can not be seen in Android battery statistics.
Wakelock Detector does not need root but you need to enable developer mode and use adb shell. Code is below, you can Google it for how to.
Code:
"adb -d shell pm grant com.uzumapps.wakelockdetector.noroot android.permission.BATTERY_STATS"

Here's an update:
So I've waited a couple days and the battery seems perfect now. I've unplugged it yesterday at around 12h30, used 9gag, browser, facebook, youtube, gmail (a bit of everything, actually) and now it's almost 10h00 and it still has 44%.
I've installed that GSam app and it seems that the phone was transferring lots of stuff through WiFi in the first 2 days, I assume that was the cause.
Thanks everyone for the tips!

METEMEDO said:
Here's an update:
So I've waited a couple days and the battery seems perfect now. I've unplugged it yesterday at around 12h30, used 9gag, browser, facebook, youtube, gmail (a bit of everything, actually) and now it's almost 10h00 and it still has 44%.
I've installed that GSam app and it seems that the phone was transferring lots of stuff through WiFi in the first 2 days, I assume that was the cause.
Thanks everyone for the tips!
Click to expand...
Click to collapse
Thank you for reporting back on how this went for you! Not everyone is so good at doing us this favour!
A lot is going on with a newly initiated mobile and perhaps it was a new firmware too that was downloading in the first days and together with everything else the battery life seems terrible to start with. My S7 downloaded a new firmware and flashed it in my first few hours with the phone and I didn’t notice before it wanted to reboot to flash. Together with all other updating going on if you reinstall apps and set things up it takes a while for the poor thing to settle!
The switching of phones did of course make the whole process start from scratch again and this made the problem seem even worse to you!

Well, Samsung should put some kind of warning in the box or something, I was getting extremely disappointed. I'm very happy now though, the phone seems to be amazing.