Database Users

Battery Drain - Again! events/0 and suspend !

Hi,
I have on my Samsung Galaxy S2 as well as on my Samsung Galaxy Note a huge battery drain caused to 2 processes : "events/0" and "suspend".
I have already read a lot of threads concerning this problem, but without finding a solution.
I found out, that I only have this bug, when activating my Wifi connection (on both devices). I tried every wifi sleep policy, still getting same results.
So finally, my Android OS battery usage is more than 50%, even more than my display.
Does anyone know a solution for this problem, considering that now I'm sure that it's linked to the wifi activation on both phones. (I did a factory reset and there was no battery drain until I activated Wifi without having any other apps installed, besides of System Panel to monitor....)
Thanks in advance,
Regards,
Ben

If your phone is rooted you should 'freeze' or remove the apps "Wifi sharing manager" and "Wifi sharing" with Titanium Backup. Fixes your Wifi-problems.
It's a service that looks for other Samsung Wifi devices constantly when Wifi is turned on, thus draining the battery.

No, my Phone isn't rooted. I was not sure if I should or not, considering the warranty problems. Is there no other way?
A lot of other users don't have this problem, I don't get why I have it-.-

k1ck said:
No, my Phone isn't rooted. I was not sure if I should or not, considering the warranty problems. Is there no other way?
A lot of other users don't have this problem, I don't get why I have it-.-
Click to expand...
Click to collapse
As far as I know, it doesn't really void your warranty as long as you do it the right way and unroot your phone before you send it back to Samsung (if problems occur).
Someone correct me if I'm wrong.
As an alternative you can disable WiFi when you are not using it with apps like Green Power and Juice Defender (although I strongly advise Green Power for it's ease of use).

Thank you.. But there has to be another way to solve this problem, because people I know don't have this bug... without using any batterysaving software. :/

I guess it's a native issue of your device...
Sent from my Motorola Xoom™ with Tiamat Moray using Tapatalk

k1ckdapro said:
Hi,
I have on my Samsung Galaxy S2 as well as on my Samsung Galaxy Note a huge battery drain caused to 2 processes : "events/0" and "suspend".
I have already read a lot of threads concerning this problem, but without finding a solution.
I found out, that I only have this bug, when activating my Wifi connection (on both devices). I tried every wifi sleep policy, still getting same results.
So finally, my Android OS battery usage is more than 50%, even more than my display.
Does anyone know a solution for this problem, considering that now I'm sure that it's linked to the wifi activation on both phones. (I did a factory reset and there was no battery drain until I activated Wifi without having any other apps installed, besides of System Panel to monitor....)
Thanks in advance,
Regards,
Ben
Click to expand...
Click to collapse
In the first week that I got the Note, the device is eating up about 10% of batter per hour even when idle. The way that I use this Android phone was no difference than other Android devices I have used. When checked the battery usage, I was stunt to find that the Android OS was using 90% of the battery. Funny is that the screen showed a usage of 20minutes, while the OS showed a usage of almost 3 hours.
Soon after, I decided to do a factory reset due to other reasons. Some how this problem went away and the usage is back to normal. I don't know what happened, but in my case, it solved the issue.
Also I don't use the Note as a phone, but rather as a mini-tablet when I am not at home. So I decided to put the device in Flight mode when it is not in use. In this mode, the device hardly uses any battery. For example when I went to sleep, the battery was at 79%. When I woke up 7 hours later, the battery still shows 79%.
Hope this help!

[David] said:
I guess it's a native issue of your device...
Sent from my Motorola Xoom™ with Tiamat Moray using Tapatalk
Click to expand...
Click to collapse
How about you stop ASS-uming about devices that you don't own. The Galaxy Note is faster, smoother, lighter, and more portible than your Motorola tablet. The only tablet that can match or even outperform the Note is the Galaxy tab so have fun with your soon to be obsolete tablet.
OT: Your issue may be fixed with a factory reset.
Sent from my GT-N7000 using xda premium

Did you try 'Green Power'?
Did you try the app "Green Power". It is pretty good and promising. It will turn off Wifi / 3g while it is not using, it save much power. The paid version just including the 'night' mode.

I'm suddenly facing this issue. Have had no problem with the battery so far. My battery went from 40% to 15% overnight with the screen off and wifi off. :s
Posting screen captures in a bit
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Edit one more time: I found the battery draining really fast just now too: 15%-12% in about 20 minutes.
Clearing the RAM seems to have stopped that though.

I really do think it's the wi-fi sharing/manager processes. I've frozen mine to see if that makes any difference.

It's exactly the same for me, with the suspend and events/0 processes...

Any Solution
k1ckdapro said:
It's exactly the same for me, with the suspend and events/0 processes...
Click to expand...
Click to collapse
I have the same problem with my SGN, it drains the battery once wifi is activated, anyone came up with a solution for that?
---------- Post added at 11:53 AM ---------- Previous post was at 10:57 AM ----------
k1ckdapro said:
It's exactly the same for me, with the suspend and events/0 processes...
Click to expand...
Click to collapse
May I know what firmware u r using? Does it support Arabic?

awsaak said:
I have the same problem with my SGN, it drains the battery once wifi is activated, anyone came up with a solution for that?
---------- Post added at 11:53 AM ---------- Previous post was at 10:57 AM ----------
May I know what firmware u r using? Does it support Arabic?
Click to expand...
Click to collapse
I solved my problem thanks to a tip on this forum. I just did a factory reset for my ohone, and then reflashed the firmware. Its working great now

ok, but what version?
I'd think it's pretty relevant to know what android/fw-version you're all using? I'm on Samsung's original 2.3.6 and have no issues...

LazPL said:
I'd think it's pretty relevant to know what android/fw-version you're all using? I'm on Samsung's original 2.3.6 and have no issues...
Click to expand...
Click to collapse
No, its not. Coze I've upgraded to 2.3.6, and then downgraded to 2.3.5 again, and my problem was still there. Only a factory reset solved my problem.
By the way, u can notice something is wrong by the amount of heat generated while using the wifi, or by how slow pc usb charging could be. It even used to discharge when connected to pc!
The amount of heat was a very strong indication that there was something wrong.

Still battery drain
Hello all,
as of 26 march 2012, I still have something problematic on my samsung galaxy note. I flashed last Open German firmware (LC1) (from samfirmware). The phone is rooted, and as far as I noticed the "suspend" process is still draining the most battery compared with the display ratio. I tried to wipe everything, I downgraded back from LB1 to KKA with Odin, wiped, flashed LC1 and reinstalled onyl paid apps (i.e. not with no advertises). I turned off the Wifi but the susped is still there, eating 63% of resources.
There are not special kernel wakelocks... any ideas on how to go ahead?

I have a standard non rooted rom. I also faced sudden battery drain, but use the following solution -
Folders - keep to the application page not home screens
Backlight - off when inside, 50% if outside or on charge (auto drains faster)
Browser - use one of the low power saving mode
Screen background - live wallpaper eats battery. Use a dark based wallpaper , use much less power
With all the above battery is fine. GB 2.3.6.

I've had the exact same problem as the topic starter. Android system running over 90% in standby and suspend and events/0 running at 100%. I had this problem on stock XXLA6, on Darky V3.3 XXLA6 and Rocket V23 XXLC1 and after a number of full wipes.
My wifi wouldn't turn off in standby and setting different sleep policies didn't do a thing.
I removed the Samsung Sharing app, installed GreenPower and set it to turn off wifi and 3G/data as I don't need sync when it's in standby anyway.
All problems are gone now, after an hour in standby I still have 100% charge and after browsing for 5 minutes it lowered to 99%. Suspend and events/0 no longer run when the phone is in standby, wifi is turned off and Android System is at 4% now.

bioweb said:
I've had the exact same problem as the topic starter. Android system running over 90% in standby and suspend and events/0 running at 100%. I had this problem on stock XXLA6, on Darky V3.3 XXLA6 and Rocket V23 XXLC1 and after a number of full wipes.
My wifi wouldn't turn off in standby and setting different sleep policies didn't do a thing.
I removed the Samsung Sharing app, installed GreenPower and set it to turn off wifi and 3G/data as I don't need sync when it's in standby anyway.
All problems are gone now, after an hour in standby I still have 100% charge and after browsing for 5 minutes it lowered to 99%. Suspend and events/0 no longer run when the phone is in standby, wifi is turned off and Android System is at 4% now.
Click to expand...
Click to collapse
What is the name of the Samsung sharing app you deleted?

Sudden battery drain & hot phone; CM7, CM9

In general, the battery is very good on the Galaxy S.
But, I have been having a strange battery problem since CM7:
The phone would suddenly heat up (near the upper back portion of the phone; near the camera) and the battery would drain very fast.
Currently running CM9, 20120330-NIGHTLY-galaxymtd, stock kernel.
Phone model: Samsung Galaxy S i9000
Radio (baseband): I9000XXJVK
CM version: 9-20120330-NIGHTLY-galaxymtd
CM Download url: http://download.cyanogenmod.com/?device=galaxysmtd
Gapps version: gapps-ics-20120317-signed
Did you--
wipe: No
restore with titanium backup: No
reboot after having the issue: Yes (1st screenshot, rebooted, 2nd screenshot)
Are you using--
a task killer: No
a non-stock kernel: No (Stock)
CMSettings/Performance settings (other than stock): All Stock
other modifications: None
I am unable to consistently repeat this bug.
On average, it occurs once a week,
4th May 2012:
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2nd pic:
A = Normal usage (you can see the gradient varies with higher/lower phone use)
B = Airplane Mode overnight
C = Normal usage
D = Strange super fast battery drain
From times provided, there is a 14% loss in battery in 37mins 38secs, which gives a battery drain of 22.3% per hour.
The phone would last less than 4.5 hours.
You can see that the phone is not being used from the Screen On bar. The phone was simply sitting on my desk at work.
Normal usage drain would suggest less than 10% per hour.
***
Now, I have always assumed it was a CyanogenMod bug. But recently found out that a friend's Nexus S (stock everything; 4.0.4) also suffers from a bug with the same outcome. I have an inkling that the problem may be Android based, but I have no way to be sure.
Is this a CyanogenMod problem? Could it be an Android bug?
Is the problem isolated to the Galaxy S and Nexus S?
For a while, I thought that toggling Airplane Mode will halt the quick battery drain. However now, I'm pretty sure that it has no effect.
***
I have tried aLogcat, hoping to see one process getting hammered repeatedly but there doesnt seem to be anything suspicious happening.
Is there anything I can do to see what the problem might be?
Are there any other apps that could reveal the problem?
I haven't yet found an official bug post similar to this yet, so please post it if you find anything similar. (Posts like "OMGz batry porblems!" dont really count)
***
Lastly, before anyone blames me for downloading crappy apps which have caused the problem, I only have 35 installed apps, and I stick to the popular ones: AirDroid, aLogcat, Angry Birds Space, Barcode Scanner, BBC News, Chrome Beta, ES File Explorer, Facebook, GMail, Google Finance, Google Goggles, Google +, Instagram etc...
The less popular ones are: Ice Cream Sandwich Clock, Shareprice
Thanks! Hopefully, we can get this issue sorted.

Never heard of that problem before. You should look if it also appears on stock ROMs and on CM without any apps(only the one you really need. But I guess it's a hardware issue.
--------------------------------

Is it just me or does your mobile network signal show a weak signal whenever your battery starts to die?
Sent from my GT-I9000 using xda premium

It could be many things...but I'd be suspicious of apps... Facebook transfers a lot of data in the background for example and I'm not even sure they updated for ICS yet.
I'd try logging out of those apps before you get to that level of battery drain and see if it still happens.
Sent from my GT-I9000 using Tapatalk 2

Same Issue
I have the same issue. The phone is not in a case while charging. The metal plates that keep the SIM card and the SD card get very hot to the touch. Sometimes the battery percentage gets stuck, so I have to let it cool down before continuing to charge.
Does anyone a way to fix this?
I'm using a Galaxy S GT-I9000M running Cyanogenmod 9 Nightly 20120503.

electrona said:
I have the same issue. The phone is not in a case while charging. The metal plates that keep the SIM card and the SD card get very hot to the touch. Sometimes the battery percentage gets stuck, so I have to let it cool down before continuing to charge.
Does anyone a way to fix this?
I'm using a Galaxy S GT-I9000M running Cyanogenmod 9 Nightly 20120503.
Click to expand...
Click to collapse
My situation occurs when it is NOT charging.
Any phone is bound to heat up when charging, its normal?
I'm more concerned with the 22% drop per hour.
Leegalaxy said:
Is it just me or does your mobile network signal show a weak signal whenever your battery starts to die?
Sent from my GT-I9000 using xda premium
Click to expand...
Click to collapse
You're suggesting that whenever "Mobile network signal" turns red it occurs?
I'll look out for it if/when it occur again.
Any ideas what it could be if it were the case?
Polling to connect too often?
(I assume "Mobile network signal" refers to 2G and 3g signals?)
Thanks.

+1 from cm9 502

With 0503 my phone is draining only when I start using Internet. The draining is about one percent per minute (very fast).

gabor977 said:
With 0503 my phone is draining only when I start using Internet. The draining is about one percent per minute (very fast).
Click to expand...
Click to collapse
When using the phone you would expect the battery to drain faster.
Try to take a larger percentage loss over a longer period of time; it isnt very accurate using tiny numbers.
My phone was more or less idle for the duration of 22% loss per hour (you can see when the screen was on via the relevant bar).

I have the same problem too.
I don't know why. It's just have battery drain and hot with cm9 or miui.

mobydeek said:
My situation occurs when it is NOT charging.
Any phone is bound to heat up when charging, its normal?
I'm more concerned with the 22% drop per hour.
You're suggesting that whenever "Mobile network signal" turns red it occurs?
I'll look out for it if/when it occur again.
Any ideas what it could be if it were the case?
Polling to connect too often?
(I assume "Mobile network signal" refers to 2G and 3g signals?)
Thanks.
Click to expand...
Click to collapse
Yes exactly. The phone begins polling the mobile 2/3G network and begins sucking power. I'm not sure how or why that would cause such drastic drops in battery but the graph seems to suggest that they are connected in some way. Data is known to drain power and if the system is repeatedly attempting to connect to mobile data while the signal is weak it may take more resources.
I could definitely be wrong here. Just an observation.
Sent from my GT-I9000 using xda premium

+1
the back side and the middle-top of the screen overheats like around 50° C while in 3g, even if i have it in the pocket.
i have UGKG3 modem bcz i need 850mhz band and it happens since CM 7.1
I admit it, i had the data sync on.

Gildegan said:
+1
the back side and the middle-top of the screen overheats like around 50° C while in 3g, even if i have it in the pocket.
i have UGKG3 modem bcz i need 850mhz band and it happens since CM 7.1
I admit it, i had the data sync on.
Click to expand...
Click to collapse
Well, data sync is supposed to be on.
Its the battery drain that isn't supposed to happen.
Any one know if this occurs on Stock Nexus S's and the Galaxy Nexus?

mobydeek said:
Well, data sync is supposed to be on.
Its the battery drain that isn't supposed to happen.
Any one know if this occurs on Stock Nexus S's and the Galaxy Nexus?
Click to expand...
Click to collapse
I was under the impression that your friend's nexus s had the same problem as per the OP...
Sent from my GT-I9000 using xda premium

Same thing here... Battery drains fast! v504 i9000
gabor977 said:
With 0503 my phone is draining only when I start using Internet. The draining is about one percent per minute (very fast).
Click to expand...
Click to collapse
+1 on CM9 0506 battery drain (1% per minute)
I know for a fact my phone is not the problem cause this bug does not happen on Gingerbread ROMs paired with Semaphore Kernel.
I also have a pair of Anker 1,800mAh batteries, plus the original 1,500mAh Samsung one and they are all draining really fast on both HSDPA/3G and 2G networks. Under WiFi it drains a bit slower. About 1% every 5 - 8 minutes or so (with screen always on as well). I live in Brazil and I use TIM 3G+ as carrier.
By the way, my phone heats up A LOT while I'm using the browser or Facebook App internet without WiFi, just using the 3G network. But I've also noticed that Facebok app had almost 30% of battery usage. Since it's the app I use the most. It didn't use to be that way on GB ROMs. But after the recent Facebook updates I wouldn't be able to tell since I've been using ICS CM9 nightlys for over over 3 weeks now.
Every time I install a new nightly I make sure to wipe cache as well as dalvik cache. I do that procedure both before and after installing a new nightly ROM.
The only thing I changed is the launcher. I use APEX Pro 1.1.1 instead so I can backup my settings and desktop apps if something goes wrong and I happen to do a full wipe.
I'm running latest update-cm-9-20120506-NIGHTLY-galaxysmtd-signed.zip with stock, default kernel. No Overclock or any other mods.
Other than that, I think this is the best ICS for my i9000. I experience no FC's and no Low Storage problems. The albums are not quadruplicating my photos like other ROMS and the compass works great on Google Maps. By the way, 3D gaming is just great with v504. Real Racing 2 runs nice and smooth on it.
Thanks for the great work Devs and sorry for making this too lengthy.

Leegalaxy said:
I was under the impression that your friend's nexus s had the same problem as per the OP...
Sent from my GT-I9000 using xda premium
Click to expand...
Click to collapse
I can't really be sure. I haven't checked their battery stats at the time of the drain, so all I'm going on is that they agree with my description.
He'a a bit of a noob so I'm not sure if hes just agreeing for the sake of agreeing.
(I know... a noob with a nexus... )
***
Following from your comment about Mobile network signal polling. You would expect a toggling of Airplane mode to disrupt the battery drain, right?
I definitely toggled it during the fast drain... maybe toggled too quickly for the network to shut off
Will try it again, if/when the fast drain occurs again.

Heavy battery drain and heat up
Hi, same problem just started yesterday
using MIUI experience v5 and evrything was fine since phone rebooted automatically and now charging is very very slow, also getting heavy battery drain and heat up, 20% in an hour. After 4 hours of charging, it stays 30-40% and heat up much more then before. tried full wipe and reinstalling different Roms and kernels but same .... any help much appreciated

moodi_ali said:
Hi, same problem just started yesterday
using MIUI experience v5 and evrything was fine since phone rebooted automatically and now charging is very very slow, also getting heavy battery drain and heat up, 20% in an hour. After 4 hours of charging, it stays 30-40% and heat up much more then before. tried full wipe and reinstalling different Roms and kernels but same .... any help much appreciated
Click to expand...
Click to collapse
Does it happen with the data on,off, airplane mode...?
It usually corrects with a reboot
Sent from my GT-I9000 using Tapatalk

I also hate that the screen isnt a sharp, vivid and bright than the samsung roms, even playing with voodoo colors if the rom have it thats why im sticking with stock gb jw4
Sent from my GT-I9000 using Tapatalk

Gildegan said:
I also hate that the screen isnt a sharp, vivid and bright than the samsung roms, even playing with voodoo colors if the rom have it thats why im sticking with stock gb jw4
Sent from my GT-I9000 using Tapatalk
Click to expand...
Click to collapse
Have you tried the mDNIe Mode settings in:
System Settings > Advanced ?
CM9 >>>>>>>>>>>>>>>> Samsung Stock
***********************************************
Anyway enough of the derailing...
For the people who get this fast drain issue:
1. Is your phone connected to Wifi when the fast drain occurs?
2. Are your Wifi settings set to Always Keep Wifi on during sleep?
Could you try setting Wifi to Never use wifi during Sleep?
System Settings > Wifi > Menu > Advanced Keep Wifi on during sleep = Never
And then report back!
Is it possible that Always using Wifi during sleep, even when you are not connected to a router, can cause the battery drain?
This is only a guess, but I'll run this little experiment too. Maybe we are getting somewhere?...
Thanks.
EDIT: I believe Google have inverted the wording on this. On 2.3 it mentions Wifi Sleep... and now its Keep Wifi ON during sleep.
I am suggesting turning it to "Never (increases data usage)"... [as opposed to Wifi Sleep = Never]

[Q] Incredibly annoying battery life on idle, AFTER rooting

I'll start off that I'm a novice android user, I got this phone a month ago and before that I was using a Nokia E63.
Anyway, so I rooted and all that junk, did a factory reset and all that junk, and now my battery is complete garbage on idle.
Before I rooted, when in idle for 8~ hours, the slope was very minimal and I lost about 1-5% battery life. Now, the battery is draining like crazy, to the point where I have to charge several times a day.
I know the problem isn't the fact that I rooted.. but what is!?!
yesterday morning
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"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
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today morning (15 minutes ago)
Obviously it's this thing called Google Services that doesn't show up *AT ALL* when I was using the phone all yesterday. It seems to only use battery when the phone is sleeping.
Halp!

kernel
The stock kernel is garbage is what it is , install Franco kernel and forget u ever had this issue , rooting your phone didn't cause battery drain like u said ..... Google services could be anything , check your maps app setting

drawde40599 said:
The stock kernel is garbage is what it is , install Franco kernel and forget u ever had this issue , rooting your phone didn't cause battery drain like u said ..... Google services could be anything , check your maps app setting
Click to expand...
Click to collapse
The stock kernel is actually very improved to all other efforts and it sleeps likes baby. I'm willing to bet maps is the issue, but it isn't like the stock kernel sucks THAT much.
Sent from my Nexus 4 using Tapatalk 2

joshnichols189 said:
The stock kernel is actually very improved to all other efforts and it sleeps likes baby. I'm willing to bet maps is the issue, but it isn't like the stock kernel sucks THAT much.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
Ya no it dose , i coundnt get over 2 hours screen on time with my normal settings with stock ROM and kernel . screen 70% , GPS , data , Google now , sync all ON . changed to Franco kernel i get 4.4 hours screen on time now , no more heat throttle , no more heat , its smoother , faster just better , something to think about / try , u can always go back just as easy

OK, now this is strange,
at first I thought it was fixed; what I did was update Google Maps. After a few hours, the problem of "google services" came back...
help!!

Keep your phone connected to Wi-Fi while you're sleeping and it will drain much less (I've sometimes seen <5% over 8-10 hours). Keeping your phone on network will continue to "wake it" during the night.

Get GSAM Battery Monitor or BetterBatteryStats to get a better look at exactly what is draining your battery so quickly.

It has to be one of the Google apps running on the background. Like somebody mentioned, get better battery stats to see what's exactly draining your phone. Also, I've noticed that if I keep NFC enabled, some apps that utilize it, will kill my phone way faster. So check NFC maybe, try disabling it and see if it makes a difference.
Sent from my Nexus 4 using xda app-developers app

I suggest you try Franco Kernel since you're rooted anyways.
No regrets.
Swagged out of my NeXus⁴ using XDA Premium

I can only underline what ppl said in terms of franco kernel. Easy to patch and insane improvement. And it is for free unless you buy his app. I was laughing when I saw those pics with such a low battery life. I always get 6 hours screen on time.

Gaheris said:
I can only underline what ppl said in terms of franco kernel. Easy to patch and insane improvement. And it is for free unless you buy his app. I was laughing when I saw those pics with such a low battery life. I always get 6 hours screen on time.
Click to expand...
Click to collapse
6 hours with data enabled the entire time?

dralways said:
6 hours with data enabled the entire time?
Click to expand...
Click to collapse
WiFi..no way he gets that with data as this phone SUCKS on battery life with 3G/H.

Well before I rooted there was absolutely no problem with battery. I use a $15 tmobile plan with no data. I basically use my phone like a tablet. NFC and most other features are disabled.
I'll give that other kernel a shot once I figure our how to do all this...

Hi
Smiert said:
I'll start off that I'm a novice android user, I got this phone a month ago and before that I was using a Nokia E63.
Anyway, so I rooted and all that junk, did a factory reset and all that junk, and now my battery is complete garbage on idle.
Before I rooted, when in idle for 8~ hours, the slope was very minimal and I lost about 1-5% battery life. Now, the battery is draining like crazy, to the point where I have to charge several times a day.
I know the problem isn't the fact that I rooted.. but what is!?!
Obviously it's this thing called Google Services that doesn't show up *AT ALL* when I was using the phone all yesterday. It seems to only use battery when the phone is sleeping.
Halp!
Click to expand...
Click to collapse
I had the exact same issue, and there is a problem with the Nexus 4 in that some applications stop the phone deep sleeping, even though the same applications have no issues on other devices. This keep awake seems to happen lower down and isn't recorded in Android as the phone being awake. The same issue appears on Franco kernel (I've tested it) as well so that isn't a fix if this is the problem.
Follow my post here to see if you are affected, then work to find the problem app. http://forum.xda-developers.com/showthread.php?p=36100401#post36100401
If anyone wants to test this with other kernels then:
Download CPU Spy. Reset CPU spy timers to zero, and first check the phone is deep sleeping by leaving for 30 minutes with screen off and USB cable unplugged and confirm Deep Sleep is around 90% or more. Now download Snowfall Live Wallpaper and set the wall paper as active, repeat the above, and see that Deep Sleep is never entered into. Use your favourite battery stats checker and you will find no indication of wake locks. Snowfall Live Wallpaper doesn't even have permission to keep a device awake.
Next set a different wall paper from the stock options (live or static) and repeat the test, note that Deep sleep is STILL not being entered even though the live wall paper is no longer in use. Now from the list of cached processes, remove the cached process for the Snowfall Live wall paper, repeat the test, and now the phone is entering Deep Sleep. So this particular wall paper has the power to stop the phone deep sleeping even when it is a cached (and so stopped) process. Another application that causes this bug is BeWeather & Widgets.
Even un-installing the problem application doesn't return the phone to be able to deep sleep, as the app is still a cached process. This can make it difficult to find the app causing a problem.
Testing these applications on a Nexus 7 and HTC One X causes no issues with the device deep sleeping, ergo, Nexus 4 bug. I'm sure there are other applications causing the same issue.
Regards
Phil

drawde40599 said:
The stock kernel is garbage is what it is , install Franco kernel and forget u ever had this issue , rooting your phone didn't cause battery drain like u said ..... Google services could be anything , check your maps app setting
Click to expand...
Click to collapse
It is not garbage at all.
The op must have too many background apps running. Probably has nothing to do with the kernal or rooting..
Sent from my Nexus 7 using xda app-developers app

I have wifi on almost all the time and I get a full day, 5 hours screen on time. I use franko kernel and aokp.
Google services must be something like lattitude reporting your location, or an app that polls data all the time. Even with
auto sync on, whatsapp syncing and wifi on all day I dont have google services anywhere in my battery list.
Of course, it is entirely possible it is something to do with google now, which I have turned off

Richieboy67 said:
It is not garbage at all.
The op must have too many background apps running. Probably has nothing to do with the kernal or rooting..
Click to expand...
Click to collapse
My "multitask" button menu is always empty. I never keep anything voluntarily suspended in the memory (if that's what your talking about)
biffsmash said:
I have wifi on almost all the time and I get a full day, 5 hours screen on time. I use franko kernel and aokp.
Google services must be something like lattitude reporting your location, or an app that polls data all the time. Even with
auto sync on, whatsapp syncing and wifi on all day I dont have google services anywhere in my battery list.
Click to expand...
Click to collapse
I originally hated Google Maps (before I rooted) because it used up about 1-5% of my battery with GPS and all other related settings disabled... no problems at all with battery back then. I basically did the same thing after I rooted, but then I started having the Google Services battery problem, where then I re-enabled most of the Google applications I disabled (maps, books, magazines, wallet) and updated them, hoping for Google Services to be satisfied, but nada.
Anyway, today was TERRIBLE. I need to keep WiFi on all the time otherwise Google Services eats my battery. But at the end of school today, I looked at my phone in horror to see that Google Maps took a huge chunk of my battery (and 3 hours earlier there was no trace of Google Maps in the battery status settings)
Battery life today : the bad stuff started happening once I left the mobile service area. Google Maps did not show up on battery settings before that time.
Keep AWAKE FOR AN HOUR???
still not sure what this is, 5% from this app basically translates to another 30-40 minutes of battery life
acceptable wifi usage
CPU SPY:
I just disabled the Google Location Services, I wonder if that would change anything... could it really be that simple? Unlikely.
As for applications, I don't have many... and I don't have a live wallpaper or anything. I keep my phone on the lowest brightness indoors and automatic outside. I try to save every bit of battery I can, and a useless wallpaper or running application doesn't help with that (I uninstalled a few apps like FB that kept on running in the background)

I wish I had 20 hours of battery life... My N4 is empty after 6 hours on CM10 with Francos kernel.

Freeze Maps

HIGH battery drain

Hello guys,
yesterday I rolled back from N to MM in order to install a fresh MM and install the N again and I still have high battery drain where Android System and AndroidOS are top battery consumers. I have high drainage when I am not using the phone too, and its not even connected to the internet too. Few days ago for two hours of not using the phone I had around 30% battery drain and I think that's not normal at all. I think that the phone is draining less battery when I am using it than I am using it...
As I said before, I have freshly installed Nougat b371, I am not rooted and the bootloader is locked.
I thought it was because I tried to install the b381 300mb version but it failed installing it and I thought it was part b371, part b381 and that was causing some problem with that and that's why I installed a fresh version of MM but that's not working too and I don't know what to do now. If you can guys help me It'd be awesome!
And I also these days never have 4g, only H+ and its losing the connection and it automatically reconnects after few seconds and I don't know why. Before I always had 4g... The fresh MM didn't solved that problem. Do you think that b381 failed installation somehow misfigured something?
And a screenshot of the consumption level.
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Wasn't H+ the symbol of 4G?

Johnny TDN said:
Wasn't H+ the symbol of 4G?
Click to expand...
Click to collapse
Before I had 4G symbol, now I have H+. And sometime it changes to 3G but thats rare.
I dont mind the H+, but it annoys me that it disconnects all the time and reconnects after few seconds...

Disable the Google app and go to phone manager،tap cleanup then tap on the option icon on the upper right of the screen. Now tap memory clean up whitelist ,and uncheck all of the apps (recommend) or just uncheck all except the apps you don't want to close like messenger ..etc. Now go to phone manager and wait for it to load then click optimize. You'll notice a huge difference.

Tech.San said:
Disable the Google app and go to phone manager،tap cleanup then tap on the option icon on the upper right of the screen. Now tap memory clean up whitelist ,and uncheck all of the apps (recommend) or just uncheck all except the apps you don't want to close like messenger ..etc. Now go to phone manager and wait for it to load then click optimize. You'll notice a huge difference.
Click to expand...
Click to collapse
Disabling Google app is just like a default thing I am doing after factory reset, hahah. And I also unchecked the apps before, its like a normal thing to me after installing all the apps I need after a factory reset. The thing is the android is draining too much battery and I was asking for a way to somehow reduce it, because even if I am not using the phone it drains the battery for more than 15%, not a couple of percents... I will do a test this night and I will let you know tomorrow.
And also the phone is getting hotter than before...
That's why I did a rollback and installed all new MM, like it came from a store, to see if that'd help but nothing...

My phone had battery drain when I disabled google backup transport.
I don't use google backup. Everything is disabled, but since I enabled it, battery drain is gone.

drisena said:
My phone had battery drain when I disabled google backup transport.
I don't use google backup. Everything is disabled, but since I enabled it, battery drain is gone.
Click to expand...
Click to collapse
Ummm... in my phone Google Backup Transport is already enabled...

Went to sleep at 4:00am and my phone had 90% od battery and woke up at 11:45am and I had 43% battery. Thats 47% battery drain over night.
HELP?
I also installed gsam battery monitor and combined app cpu was the highest battery drainer with 76%...
Maybe to try deleting EVERYTHING from TWRP and flash a zip file of emui 4.1? If thats better than a normal factory reset I would try that too, because factory reset didnt solved my problem...

I have the same issue on B360.
Phone Idle in Hardware Section and Android OS in software drains alot during standby. Android OS keeps the system awake.

I think they played around with the cpu governor since they removed the battery performance mode.

Hey guys, i found a bug with wifi i think, i tried with latest LOS, RR, OMNI and SLIM roms (meticulus)
I found that in my case, the battery drain comes from the wifi not turning off when the phone is asleep, regardless any saving options i tick.
I discovered it while checking my wifi router, i saw my phone listed but it was un plugged from charger and locked.
I unlocked my phone and surprise, the wifi icon was already here full and ready now i'm searching a rom without those issues as i'm sure it did not do that when i flashed my first roms on this device (CM13 i think)
can some of you guys double check this issue so i can know if it's related to my device only ?

mchtt said:
Hey guys, i found a bug with wifi i think, i tried with latest LOS, RR, OMNI and SLIM roms (meticulus)
I found that in my case, the battery drain comes from the wifi not turning off when the phone is asleep, regardless any saving options i tick.
I discovered it while checking my wifi router, i saw my phone listed but it was un plugged from charger and locked.
I unlocked my phone and surprise, the wifi icon was already here full and ready now i'm searching a rom without those issues as i'm sure it did not do that when i flashed my first roms on this device (CM13 i think)
can some of you guys double check this issue so i can know if it's related to my device only ?
Click to expand...
Click to collapse
I didnt had something like that while I was using b371. When I turned the Wi-Fi off it was off.
In my case I think that there is something screwed up with the mobile network and causing battery drain and warming up the phone...
Maybe I will try a new rom, to see if the problem will be still there.

mchtt said:
Hey guys, i found a bug with wifi i think, i tried with latest LOS, RR, OMNI and SLIM roms (meticulus)
I found that in my case, the battery drain comes from the wifi not turning off when the phone is asleep, regardless any saving options i tick.
I discovered it while checking my wifi router, i saw my phone listed but it was un plugged from charger and locked.
I unlocked my phone and surprise, the wifi icon was already here full and ready now i'm searching a rom without those issues as i'm sure it did not do that when i flashed my first roms on this device (CM13 i think)
can some of you guys double check this issue so i can know if it's related to my device only ?
Click to expand...
Click to collapse
Phone Manager-Battery-Settings-Keep wifi while sleeping.

Johnny TDN said:
Phone Manager-Battery-Settings-Keep wifi while sleeping.
Click to expand...
Click to collapse
lol, yes man. does not work, i can choose any options it does never turn off the wifi while the phone is locked...
so i'm trying to do a task (tasker) to auto turn off wifi when the screen is locked.

Installed MM again yesterday, rooted the phone and installed Better Battery Stats and here are the results after the night. I had a battery drain of 30% over night.
Here are the results of the BBS.
A solution?
http://imgur.com/a/OcdE7
(Scroll down for more screenshots)

ZeusftW97 said:
Installed MM again yesterday, rooted the phone and installed Better Battery Stats and here are the results after the night. I had a battery drain of 30% over night.
Here are the results of the BBS.
A solution?
http://imgur.com/a/OcdE7
(Scroll down for more screenshots)
Click to expand...
Click to collapse
xx wrong xx

hi, I have similar problem, during night 10-15 percent of battery drained.
i think the cause is either the google account sync, some google apps or google backup functionality.
according to power manager, the phone is awake and also OS has the most percentage in consumption.
i dont have root, do someone figure that out or at least found out the reason?
thx

7hit said:
hi, I have similar problem, during night 10-15 percent of battery drained.
i think the cause is either the google account sync, some google apps or google backup functionality.
according to power manager, the phone is awake and also OS has the most percentage in consumption.
i dont have root, do someone figure that out or at least found out the reason?
thx
Click to expand...
Click to collapse
I fixed my issue by changing the mobile network to 2G/3G, not using the 4G and for some reason that was causing some problems with the battery drainage.
I rooted the phone and installed Better Battery Stats (which is working with non-rooted phones but using adb) but I couldn't make it work so I rooted the phone only for that, to see what was draining my battery so much with a lot of help of @pilgrim011.
If you have a problem with the 4G as I mentioned before, try disabling it and check the results after.
And I don't think that google's backup and sync apps were causing drainage because they obviously need an internet to work, or to back things up to be simple. If I am not wrong, haha.
Hope you'll find a fix for your problem.

Ok,going to try and get back with results

Ok so i am back, and have bad news. But at least i am seeing a pattern in behavior.
Last evening i charged phone to max, before sleep ir was ok - android os little drain, android apps bigger.
After night the battery dropped from 97 to 79%, like last time i charged to max, the system was awake regurarly and all drained by android os.... i only happens during tje first night, do you have any ideas?

Overnight battery drain

I have a problem that I noticed some people are experiencing. Overnight idle the phone drains like 25% with wifi off and on battery saver. Is there a known cause for this? My Honor 8 is brand new. Help!
Edit - When I go to sleep -
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After I wake up it's normal again (I turn WiFi on and use phone normally) -
I will try and leave WiFi on during the night today to see if it makes any difference.

Fyi, since I woke up and turned wifi on, the battery has only went down by 1%! Something is not right. How can it drain so much without using it and almost none when I actually use it.
Screenshot from today (from 1pm till 7pm, only lost 2%)
i.imgur.com/xLBcILO.png

Which hardware and firmware version are you using?
Do you have cellular data connected when WiFi is off?
Does the battery graph show constant system awake time during these periods of high drain?

PuffDaddy_d said:
Which hardware and firmware version are you using?
Do you have cellular data connected when WiFi is off?
Does the battery graph show constant system awake time during these periods of high drain?
Click to expand...
Click to collapse
Hi. I'm using FRD-L09 and EMUI 5, build FRD-L09C432B381.
No wifi, no mobile data turned on. All apps closed.
Yesterday I left it at ultra power save when it was at 12%, after I woke up (around 6 hours). it was off. Don't think that's normal either.

Sometimes I have the same problem. Overnight phone drops 25% of the battery.
What I found useful is to turn off Wifi+, Link+ and in GPS location (3 dots -> Search settings -> turn off Searching for Wifi and Bluetooth). In fact that will stops searching for Wifi, while Wifi is toogled off.
It might help you, I think this is Android 7 issue, since most people complains about heavy battery drain when not using the phone. Noone complained when using Android 6.

This isn't normal, but at the same time it is... I don't think any one person has figured out the real reason why, but many of us have had similar battery drain for seemingly no reason. I simply backed up my data and factory reset the phone and haven't had an issue since. Others haven't been so lucky.
Can you take a screen shot of your battery graph so we can see if your system is awake during the drain?

I have update B381 and u have this problem with battery drain for my is very bad battery life update B360 was good for battery life.

I found the high Idle battery usage some what related to the phone keep search for upgrade and the process "android OS" was consuming around 50% all the time.
After set these two setting, it fixed the battery drain and "android OS" only use around 20%. Now it remains 100% battery for 10 hours standby.
1) Setting->System update ->(three dots)->Update Settings->Wifi auto download (Disable)
2) Setting->Battery->(Setting icon on top right)->keep wifi on when sleeping->Never

I did as everyone suggested and turned off auto WiFi and bluetooth search and auto WiFi download of the system updates. If I turn off keep WiFi on during sleep, I don't get any notifications from messaging apps, so I won't do that. I've also only left Messenger, Viber and Whatsapp in the whitelist of programs that will be closed when screen is locked.
Here is the most recent screenshot of the battery usage.

Try factory reset and wipe cache. Screenshot tells us that your phone is awake when you are not using it.

Okay, I'll try later tonight and reply tomorrow if anything's changed.
p.s. Any good full backup apps?

Re7r0re7r0 said:
Okay, I'll try later tonight and reply tomorrow if anything's changed.
p.s. Any good full backup apps?
Click to expand...
Click to collapse
Just use the backup tool that was loaded on the phone. It works nearly perfectly to backup all your texts, call log, apps, settings, etc.
---------- Post added at 08:55 AM ---------- Previous post was at 08:52 AM ----------
Re7r0re7r0 said:
I did as everyone suggested and turned off auto WiFi and bluetooth search and auto WiFi download of the system updates. If I turn off keep WiFi on during sleep, I don't get any notifications from messaging apps, so I won't do that. I've also only left Messenger, Viber and Whatsapp in the whitelist of programs that will be closed when screen is locked.
Here is the most recent screenshot of the battery usage.
Click to expand...
Click to collapse
Looks like it tried to sleep when you went to bed last night, but something woke it up early in the morning and it never went back to sleep. Find out what that was and you may solve your problem.

If you have data, you still get notifications.
Re7r0re7r0 said:
I did as everyone suggested and turned off auto WiFi and bluetooth search and auto WiFi download of the system updates. If I turn off keep WiFi on during sleep, I don't get any notifications from messaging apps, so I won't do that. I've also only left Messenger, Viber and Whatsapp in the whitelist of programs that will be closed when screen is locked.
Here is the most recent screenshot of the battery usage.
Click to expand...
Click to collapse

As a test, I created a Magisk module that freezes all of Huawei's system power management apps and superfluous services. I just loaded it today, so it'll be a few days before I can provide feedback on if it improves battery life.

I backed it all up and am wiping it tonight but I was thinking. Perhaps it's not a good idea to restore the data yet? Maybe I should try a night with stock settings/apps to see if that makes a difference, then restore all and see if there's any difference.

Re7r0re7r0 said:
I backed it all up and am wiping it tonight but I was thinking. Perhaps it's not a good idea to restore the data yet? Maybe I should try a night with stock settings/apps to see if that makes a difference, then restore all and see if there's any difference.
Click to expand...
Click to collapse
Honestly, I wouldn't expect that experiment to provide you with any useful info. You will naturally see more battery drain once you have your apps and services running because more will be happening in the background. Reinstall everything and use your device normally to get the most accurate comparison to your previous battery life.

netvorCZEK said:
Try factory reset and wipe cache. Screenshot tells us that your phone is awake when you are not using it.
Click to expand...
Click to collapse
Factory reset I know how to do, but how to give the wipe cache?

IIRC, the cache should be wiped automatically when you Factory Reset.

I like to do it manually. Turn off the phone. Hold Vol + and power button.

I wonder how the battery drain overnight will be with the new custom Roms which are out.