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Battery drain on nexus 4 since yesterday

So, yesterday I noticed a sudden battery drain on my nexus 4. After checking battery it showed that AndroidOS takes over about 50% of the battery usage. It also showed that time awake was pretty much the same as the amount of time since I unplugged the phone, even though I kept my phone in sleep mode for the most of the day. After some research I downloaded better battery stats and it showed that from the moment I turn the screen off a process called suspend_backoff runs pretty much the entire time. Eventually I got it down to wifi. If I turn off wifi there are no processes running after the screen is turned off (or if there are they are 30 seconds tops), but the moment I turn wifi on suspend_backoff runs pretty much the entire time screen is off. I tried removing all of my apps, as well as doing factory reset but nothing helps. The moment I turn wifi ON this suspend_backoff consumes pretty much all the time during screen off period. Is anyone experiencing anything like this ? I have 4.2.2 on the phone and I havent' seen this extreme drain until just yesterday.

I experience the samething. Android OS would drain as much as the screen time.
I narrowed it down to the suspend_backoff. But the weird thing is that when i'm at home on my home wifi, suspend_backoff doesn't seem to drain anything at all. But when I'm at school, suspend_backoff kicks in.
Anyone help?

hihihoho said:
I experience the samething. Android OS would drain as much as the screen time.
I narrowed it down to the suspend_backoff. But the weird thing is that when i'm at home on my home wifi, suspend_backoff doesn't seem to drain anything at all. But when I'm at school, suspend_backoff kicks in.
Anyone help?
Click to expand...
Click to collapse
how did you narrow it down? Im having the same problem!

This is caused by a kernel wakelock. A bad mobile connection make battery drain worse... using WLAN nearly fixes this problem.
Thought this problem has got fixed in 4.2.2, at least battery life got improved and the wakelock reduced.
If it is appearing since yesterday, it is triggered by a app often waking the phone up using mobile data (that's why fixed with WLAN) and prevent the phone from getting into deep sleep as fast as it should.
hope i could help.

I use Greenify to hibernate every single user installed apps, then I release them one by one to see which one cause suspend backoff. But suspend backoff still occurs. So I think it's the kernel itself.

AW: Battery drain on nexus 4 since yesterday
hihihoho said:
I use Greenify to hibernate every single user installed apps, then I release them one by one to see which one cause suspend backoff. But suspend backoff still occurs. So I think it's the kernel itself.
Click to expand...
Click to collapse
as i said before, an app needs data, so it starts callung the kernel wakelock... this one causes tje drain, not the app itself
Sent from my Nexus 7 using xda app-developers app

hihihoho said:
I use Greenify to hibernate every single user installed apps, then I release them one by one to see which one cause suspend backoff. But suspend backoff still occurs. So I think it's the kernel itself.
Click to expand...
Click to collapse
Yeah, definitely not user apps. I did full reset on the phone to factory settings, no user apps. Even tried disabling Google Play and Google store after the reset. Still the same. The only thing that gets rid of it is disabling WiFi.

hihihoho said:
I experience the samething. Android OS would drain as much as the screen time.
I narrowed it down to the suspend_backoff. But the weird thing is that when i'm at home on my home wifi, suspend_backoff doesn't seem to drain anything at all. But when I'm at school, suspend_backoff kicks in.
Anyone help?
Click to expand...
Click to collapse
When did you start noticing this ? Has it been for a while or just recently ? I first noticed it yesterday (had the phone for a bit over a month now, didn't see any issues until just yesterday)

hihihoho said:
I use Greenify to hibernate every single user installed apps, then I release them one by one to see which one cause suspend backoff. But suspend backoff still occurs. So I think it's the kernel itself.
Click to expand...
Click to collapse
What is the difference between greenify and limit background apps in developers options?

AW: Battery drain on nexus 4 since yesterday
stop discussing, use search instead... http://forum.xda-developers.com/showthread.php?t=1999368
like i told you 3times now.... it's the wakelock
Sent from my Nexus 7 using xda app-developers app

indoh said:
stop discussing, use search instead... http://forum.xda-developers.com/showthread.php?t=1999368
like i told you 3times now.... it's the wakelock
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
Yeah, it's clear that it's the wakelock. What's not clear is why. Also it's not the msm_hsic_host that the forum link you sent refers to. I don't have a problem with msm_hsic, that one barely takes any time during the day (maybe 30 seconds during several hours of standby). The wakelock causing this particular issue is "suspend_backoff" wakelock which supposedly happens when there is a sequence of sleep/wake calls too close together so the system decides to keep it awake. I was unable to find what exactly is causing the issue, even after restoring to the factory settings I kept seeing the same problem.
Anyway, I was able to "resolve" it by installing JuiceGuard app and setting it so it disables wifi when the screen is off. wakelock is gone now and my battery usage is back to normal.

I only get the suspend backoff wake lock when I'm connected to the university Wifi. When I'm at home, everything is fine, no suspend backoff. So my guess is that the Wifi encryption at university is different and causing a succession of close "awake" and cause wake lock.
I did factory reset like 3 times and it still there.
I'll try disable Wifi on Monday and see how it goes.

Same here, when wifi disabled the wakelock doesn't occur.
I have tried almost all of the kernels and non of them seem to help.

hihihoho said:
I only get the suspend backoff wake lock when I'm connected to the university Wifi. When I'm at home, everything is fine, no suspend backoff. So my guess is that the Wifi encryption at university is different and causing a succession of close "awake" and cause wake lock.
I did factory reset like 3 times and it still there.
I'll try disable Wifi on Monday and see how it goes.
Click to expand...
Click to collapse
Interesting... Maybe it is encryption. One thing with my Wifi is that it doesn't use password, but MAC list instead. It may indeed be an issue with different wifi encryption types.

OP do you have maps 6.14 on your phone? Mine kept switching on location reporting for a while and it woke my phone 344 times last night. I've been struggling with the same wake lock issues. I'm going to recharge (again) with maps disabled and see if that helps.
Sent from my Nexus 4 using Tapatalk 2

Check your Google account sync settings... In settings
The clowns may have left you a lovely gift there without telling you or asking any kind of permission.

The latest Maps was giving me horrible battery drain, on WiFi. I'd sleep for six hours with a fully charged phone and wake up with 10% left. it even enabled itself when. I disabled it in settings. I converted it to a user app by moving it to /data/app and greenified it. Seemed to have solved all of my issues with the suspend back off wake lock.

Download greenify
Sent from my Nexus 7 using Tapatalk 2

For some weird reason, I was also having serious battery drain suddenly since yesterday.
Turned out it was maps, and disabling Google network locations hugely increased battery life
Sent from my Nexus 4

[Q] Android OS accounting for a huge part of battery usage

Hello all.
First off, bear with me if this has been discussed before, I have searched on google and in previous threads here (including the amazing 58.5 hr standby and 6 hr. usage thread) but I cannot find the culprit of the huge Android OS drain.
The battery lasts about 4.5 hrs of screen on time , which is pretty neat but nowhere near what other people are reporting. I know the battery needs to go through a few cycles before reaching its full potential, but the Android OS drain is what bothers me. Please note that I am unrooted due to warranty issues and an unreliable rootchecker.
I have done the following:
Disabled bloatware
Disabled LG MIT (P.S Do you recommend me to change other settings from the hidden menu?)
Disabled auto sync and backup in the settings menu.
Disabled Google Location services from Google Settings, although I kept the location settings in the settings menu due to widget.
I installed Lux to prolong battery life and it only operates upon waking the device.
Installed BBS and Wakelock detector
BBS shows 154 partial wakelocks in just 3 hours of standby from WifiOffDelayIfNotUsed and NetworkLocationLocator 191 partial wakelocks.
Wakelock detector shows a fair amount of Facebook wakelocks (86 in 3 hours - could that be the culprit?) and Viber with 21 wakelocks. This makes me miss Greenify - damn!
To round this off, can anybody please give me advice on how to solve this drain? As previously mentioned I am not willing to root it just yet. Feel free to include perfomance boosting tips as well if you have any
Thanks in advance.

vPro97 said:
Hello all.
First off, bear with me if this has been discussed before, I have searched on google and in previous threads here (including the amazing 58.5 hr standby and 6 hr. usage thread) but I cannot find the culprit of the huge Android OS drain.
The battery lasts about 4.5 hrs of screen on time , which is pretty neat but nowhere near what other people are reporting. I know the battery needs to go through a few cycles before reaching its full potential, but the Android OS drain is what bothers me. Please note that I am unrooted due to warranty issues and an unreliable rootchecker.
I have done the following:
Disabled bloatware
Disabled LG MIT (P.S Do you recommend me to change other settings from the hidden menu?)
Disabled auto sync and backup in the settings menu.
Disabled Google Location services from Google Settings, although I kept the location settings in the settings menu due to widget.
I installed Lux to prolong battery life and it only operates upon waking the device.
Installed BBS and Wakelock detector
BBS shows 154 partial wakelocks in just 3 hours of standby from WifiOffDelayIfNotUsed and NetworkLocationLocator 191 partial wakelocks.
Wakelock detector shows a fair amount of Facebook wakelocks (86 in 3 hours - could that be the culprit?) and Viber with 21 wakelocks. This makes me miss Greenify - damn!
To round this off, can anybody please give me advice on how to solve this drain? As previously mentioned I am not willing to root it just yet. Feel free to include perfomance boosting tips as well if you have any
Thanks in advance.
Click to expand...
Click to collapse
I don't know how to solve the problem, but I can tell you this regarding root: Flashing a KDZ file after doing a full factory reset makes the roottripper reset too, including a showing of UNROOTED in the download mode.

Awesome news! Makes me reconsider rooting my device. I would still want to know what I can do without rooting. Thanks a lot for the info ?
Sent from my LG-D802 using xda app-developers app

Use Better Battery Stats to see exactly what is causing wakelocks and GSam Battery Monitor to see what's using other things.
"A huge amount of battery" is meaningless without context. If it says "50%" but that's .5%/hr, it means NOTHING else was doing anything really.

Disable KnockON, then Android OS will shrink to a few percents in your statistics.
I have tested it out, KnockON is causing the most part of Android OS.
Via LG G2

Wifioffdelayifnotused can be caused by going in and out of service. Disable optimizing in Wi-Fi, disable disconnect on low signal, set sleep policy to never.

vPro97 said:
Awesome news! Makes me reconsider rooting my device. I would still want to know what I can do without rooting. Thanks a lot for the info ?
Sent from my LG-D802 using xda app-developers app
Click to expand...
Click to collapse
khaytsus said:
Use Better Battery Stats to see exactly what is causing wakelocks and GSam Battery Monitor to see what's using other things.
"A huge amount of battery" is meaningless without context. If it says "50%" but that's .5%/hr, it means NOTHING else was doing anything really.
Click to expand...
Click to collapse
well. As stated in OP I am using BBS but I will try out Gsam battery.
You've got a point there, but I'm not seeing 24 hours of standby, which annoys me. A side note- if there was no' something' draining my battery wouldn't it show as "device is idle" rather than android os?
Fir3blade said:
Disable KnockON, then Android OS will shrink to a few percents in your statistics.
I have tested it out, KnockON is causing the most part of Android OS.
Via LG G2
Click to expand...
Click to collapse
Thanks for the tip. I am well aware that knock on uses up some battery but I don't recall the people getting 6 hrs of usage and 50 hrs of standby disabling this feature. Anyway I wouldn't disable this feature even if it would give me am extra hour of usage (unless in dire need) ??
And to the last post (which I forgot to quote) WiFi is set enabled in standby and the other option is disabled. The only thing I have checked in the advanced WiFi settings is lower battery consumption when device is using WiFi. Thanks for clarifying though.
It seems like. Android os is a mystery ?
Sent from my LG-D802 using xda app-developers app

Delete.

The cpu power consumption is the biggest problem~
I had read a Chinese thread that CPU quality is the major problem causing this huge battery drain. Qualcom classified 7 quality levels. Slow, nominal, fast, very fast, ultra fast,....from class 0 to 6.(higher is better). the higher class quality means that cpu can use lower voltage to reach higher frequencies. The difference between C 6 and 0 is about 0.15V,,, :crying:
PS: [email protected](0.95V Max)/ [email protected](1.1V Max)

There has been some improvement but the phone was awake for 42 minutes more than screen on time . I posted some screenshots.
Sent from my LG-D802 using xda app-developers app

Steamer86 said:
Wifioffdelayifnotused can be caused by going in and out of service. Disable optimizing in Wi-Fi, disable disconnect on low signal, set sleep policy to never.
Click to expand...
Click to collapse
I'd say leave wifi optimization, set sleep policy to any other than never, and turn off the feature that turns wifi off if the access point you're connect doesn't have internet access. Or try aosp
Sent from my LG-D802 using XDA Premium 4 mobile app

If you're connected to more Wi-Fi than cell signal, leaving this on will do nothing to increase battery usage, more so increase it. Counterintuitive, but it is what it is. This is Google software itself, not hardware. Learn before you post BS. The phone uses more battery searching and refreshing for 4G data signal than it ever will on Wi-Fi. Do what this guy says if you spend most the day in Wi-Fi, and watch those counts hit the roof. If your of Wi-Fi most the day, just turn it off until you are, all good. Why waste battery when unneeded.

How do you deal with NlpCollectorWakeLock?

Battery life on this phone is amazing under use, but only average on standby, which is the only negative thing I could say about G2. I routinely lose 2%-3% battery over night, it was the same on JB and now on KK.
I've been checking the wake locks and it is our old friend Google Services and its NlpCollectorWakeLock that keeps the phone awake about 10 minutes a day, since Google likes checking our location 1000 times a day. Turning location off doesn't help at all.
What are your experiences and how have you been dealing with this on G2 specifically? Don't just say install Wakelock Terminator, if you used it also share your experiences with it. Does Greenifying make a difference and what did you hibernate? Did you have any issues afterwards with apps that use location?
And most importantly, did it have any effect on battery life in standby?

Can't remember whether Knock On/Off feature has anything to do with the NCWL but just disable it and see what happens.
Also, down 2-3% overnite seems normal to me.

votinh said:
Also, down 2-3% overnite seems normal to me.
Click to expand...
Click to collapse
Normal but we had 0% even on ICS 4.2.2, and on 4.1.2 my previous phones did managed to spend 0% overnight
laserburn said:
Turning location off doesn't help at all.
Click to expand...
Click to collapse
Yeah, constantly running Location Services bugs me off too.
Maybe you could find solution in that http://forum.xda-developers.com/google-nexus-5/general/nlpwakelock-nlpcollectorwakelock-t2551846 topic, I didn't read it

Location services disable location reporting and history ... That helps decrease it (only do this if you don't use Google now location based features)... Also you can set location to device only if you want ... And greenify the Google maps app ...

... did you actually just complain about a 3% battery drain in 6-7 hours of idling or whatever you define 'night' as?...
Getting back to the topic, one of the bigger things you could do to reduce NlpCollectorWakeLock is disable Google Now. I personally don't find it very useful in my country so I never keep it on. Thus, I get that 3% battery drain overnight with WiFi on.

Turn off wifi assist in location services just set it to device only and it will be gone
Sent from my LG-D800 using xda app-developers app

iamtha1 said:
Turn off wifi assist in location services just set it to device only and it will be gone
Sent from my LG-D800 using xda app-developers app
Click to expand...
Click to collapse
Just turn off "Google Now", you'll be amazed how long your battery will last.....
Cheers

Or install this app
https://play.google.com/store/apps/details?id=cn.wq.disableservice
Sent from my LG-D803 using xda app-developers app

I think I discovered a fix to some hard to track wakelocks by the android services.
What I did:
-settings > share & connect > menu button > dlna feature > menu button > settings > uncheck share options.
Let me know! First post!

Greenify?

If i can Root my 9005 - i intend to use Greenify,, as my battery is very poor (stock i'm lucky if i get 8-9 hours light/moderate use)
Is it a rated app,, can i expect big battery gains?
Thanks.

Depends which apps you have installed and how you use them. For example facebook drains much battery so you coukd greenify the app but if you do so you wont recive notifications anymore from it aslong you arent actively using the app.
In other words it prevents apps from wacking up.

As someone who already always manually force-closed all running apps, all I noticed was an increase in free time, as greenify is faster at it.
I didnt notice any increase in battery life.
If you don't manually force-close your apps, it'll probably have a bigger impact.
Sent from my SM-N9005 using Tapatalk 2

You will have some slight increases of battery of you force close the apps wich cause many wake locks like what's app
Sent from my SM-N9005 using XDA Premium 4 mobile app

JCM800 said:
If i can Root my 9005 - i intend to use Greenify,, as my battery is very poor (stock i'm lucky if i get 8-9 hours light/moderate use)
Is it a rated app,, can i expect big battery gains?
Thanks.
Click to expand...
Click to collapse
It seems to help mine. I run it with the Xposed Module that adds features that still preserve the notifications from Facebook, etc. I also have it set to boost mode for it to work faster.

I also haven't noticed much of an improvement. Many people swear it's a miracle app, for me it only turns off notifications.
True battery saver: green power payed version (on Google play). Set the phone to sync once at 4h and turn off wifi and mobile data on screen off. Awesome app, I tell you.

lvnatic said:
I also haven't noticed much of an improvement. Many people swear it's a miracle app, for me it only turns off notifications.
True battery saver: green power payed version (on Google play). Set the phone to sync once at 4h and turn off wifi and mobile data on screen off. Awesome app, I tell you.
Click to expand...
Click to collapse
I do all that myself manually.... Sync always off and I turn Wifi or mobile data on when I need it, and turn it off when I'm done.
Cheaper than buying an app, too.
The real saver for me has been LUX. With our climate and the time I spend indoors, a brightness between -20% and 4% is more than sufficient. Now THAT saves battery! With brightness at 4, I loose 1% per 15 minutes whilst browsing! With it at 50, 1% per 5 minutes. At 100%, 1% per 90 seconds.
And when i use it in the dark, - 70%. I barely lose any charge at all whilst being an insomniac. It's been 20 minutes, still on 55% charge, which it also was 20 minutes ago. WiFi on, eWeatherHD update on, Tapatalk, Facebook and Firefox in use.
(if websites used less of that eyesore white, it'd save even more.)
Sent from my SM-N9005 using Tapatalk 2

I would suggest to remove some bloatware comes with the ROM / firmware itself.
It safes much battery though.
As well as turn on location, and on it when you want to use it.
And I freeze some apps which is running in background (which greenify can't detect it), which I don't use it as well.
and change to a good kernel.
it will really have a good deep sleep, never up if I never wake it up.
the apps running in background is only messenger apps like whatsapp, viber, and that kind of stuff. I never freeze this one and never put it on greenify as well.
So far so good.

lvnatic said:
I also haven't noticed much of an improvement. Many people swear it's a miracle app, for me it only turns off notifications.
True battery saver: green power payed version (on Google play). Set the phone to sync once at 4h and turn off wifi and mobile data on screen off. Awesome app, I tell you.
Click to expand...
Click to collapse
I might look into that app. I go with the "free" lol DIY manual turn data/wifi off thing too, but sometimes I forget and I see wifi on when I had turned it off or so I thought. some apps are worth the couple dollars or so and I might very well get this one. Thanks for the tip on it. I like too that it automatically turns on wifi or data such as when you go to read an email or something.

You can also give these a try:
- Deep Sleep Battery Saver
- Juice Defender
- Tasker (You can configure it to auomate nearly anything, from 'turn on wifi at this and this gps location' to 'shut up completely between 2200 and 0800'. Does a lot of non-battery related things too, like launch a specific app when plugging in headset, or automatically move photo's from internal to SD.)

ShadowLea said:
You can also give these a try:
- Deep Sleep Battery Saver
- Juice Defender
- Tasker (You can configure it to auomate nearly anything, from 'turn on wifi at this and this gps location' to 'shut up completely between 2200 and 0800'. Does a lot of non-battery related things too, like launch a specific app when plugging in headset, or automatically move photo's from internal to SD.)
Click to expand...
Click to collapse
Juice defender is a dead project and 2 years old. Greenpower is basically the same app but still supported.
Sent from my SM-N9005 using XDA Free mobile app

ShadowLea said:
You can also give these a try:
- Deep Sleep Battery Saver
- Juice Defender
- Tasker (You can configure it to auomate nearly anything, from 'turn on wifi at this and this gps location' to 'shut up completely between 2200 and 0800'. Does a lot of non-battery related things too, like launch a specific app when plugging in headset, or automatically move photo's from internal to SD.)
Click to expand...
Click to collapse
Hey thanks! I did go ahead with Green Power yesterday and I have to say I notice enough of a difference for sure. My usage has been with a phone call, check messages, several texts, check email a few times and some light surfing. i'm at 89% at 8 hours pulled off 100% charge and would have been lower for sure into 70s at best. definitely notice.
Sent from my SAMSUNG-SM-N900A using XDA Free mobile app

Terrible battery life? What gives?

Hey guys...
Just here to say that I unplugged this phone at around 5 in the morning, and around 5 hours later its already down to 74%.
What did I do? Only about 10 minutes of mobile hotspot, a 2 minute phone call, and three text messages. The rest just idling...
1/4th of my battery life for just that?
What the heck?
Everything is disabled and the screen brightness is low... Whats the matter with this phone?

Looks like something is keeping your device awake.
Can you please add some screenshots of your battery graph?
In addition, you can try to boot into safe mode. If your problem is gone in safe mode, a third party app is interfering.

If you're rooted, try installing Wakelock detector or BBS (Better Battery Stats) and check out what is waking up your device.

If you use Gas Buddy, it was known to be causing massive bluetooth wakelocks. Either uninstall it or update it to the latest version.
Set your wifi to 2.4 ghz only. On 6.0 and 6.0.1, the 5 ghz band has been causing abnormal battery drain and keeping phones from entering doze mode. Here's the issue being reported: https://code.google.com/p/android/issues/detail?id=197460
If neither of these make a big improvement, you'll have to use your battery stats (and if rooted, use Better Battery Stats or Wakelock Detector) to specifically see what's keeping the phone awake. In either of these apps, filter the view by "Alarms" or "wakeup triggers" and you'll see what the heavy hitters are.
Be sure to go into Location>Settings and turn off wifi and bluetooth scanning.

Hi.the maps app isvuding WiFi and gps even though both are disabled and I'm not using it... Any ideas?