Database Users

Battery drain when idle

Hi Guys,
I just got my LG G2 and so far lovin' it. I just noticed a battery drain problem though.
I left my phone at 87% when I went to bed at around 12am, this is with WIFI and Mobile Data off. When I woke up at 7:30am, it was down to 71%. I checked BBS and the number one item under Kernel wakelock was bam_dmuc_wakelock.
I've read multiple threads regarding this but have not found a concrete solution. One thread (http://forum.xda-developers.com/google-nexus-5/help/-t2688930) said that this is normal and some app may just be causing this.
Here are the current apps installed on my phone which were also the same ones installed on my HTC One X where this battery drain problem does not exist:
BBS
Dolphin Browser
Facebook
Instagram
LinkedIn
KK Keyboard
NBA GAME TIME
Olympus Image Share
Simple mp3 Downloader
Speedtest
Tapatalk
TeamViewer
UFC
Viber
Whatsapp
Youtube
Can anyone help me with this battery drain issue of mine?
Thanks in advance!

If you rooted, you can try Greenify to identify the culprit.
Maybe you can check battery settings to see what is eating it up?
admp said:
Hi Guys,
I just got my LG G2 and so far lovin' it. I just noticed a battery drain problem though.
I left my phone at 87% when I went to bed at around 12am, this is with WIFI and Mobile Data off. When I woke up at 7:30am, it was down to 71%. I checked BBS and the number one item under Kernel wakelock was bam_dmuc_wakelock.
I've read multiple threads regarding this but have not found a concrete solution. One thread (http://forum.xda-developers.com/google-nexus-5/help/-t2688930) said that this is normal and some app may just be causing this.
Here are the current apps installed on my phone which were also the same ones installed on my HTC One X where this battery drain problem does not exist:
BBS
Dolphin Browser
Facebook
Instagram
LinkedIn
KK Keyboard
NBA GAME TIME
Olympus Image Share
Simple mp3 Downloader
Speedtest
Tapatalk
TeamViewer
UFC
Viber
Whatsapp
Youtube
Can anyone help me with this battery drain issue of mine?
Thanks in advance!
Click to expand...
Click to collapse

Here's my stats before I go to sleep today. I'll post my stats as soon as I wake up. I will turn off both wifi and 4G data.
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bam_dmux is for mobile data so anything that keeps mobile data connection open it will show up. Stands for broadband access multiplier demultiplier.
so the problem in question should be simple, what app is continuously using your mobile data connection causing the bam_dmux_wakelock

The thing is, my mobile data is always off when I sleep. Is it possible that Whatsapp and Viber is causing this? I mean even though mobile data is off, can they be trying to look for a connection thus causing the wakelock?
Sent from my LG-D802 using Tapatalk

BTW, I installed Deep Sleep Battery Saver and tried it last night when I went to sleep at 12am. When I woke up at 7am, the phone only discharged 4% now.
Sent from my LG-D802 using Tapatalk

ive had issues with facebook eating my battery on a bunch of devices. when removed i see a dramatic change in battery life. that is my experience, and may or may not be concrete enough to say that it would be the problem for battery drains.

admp said:
The thing is, my mobile data is always off when I sleep. Is it possible that Whatsapp and Viber is causing this? I mean even though mobile data is off, can they be trying to look for a connection thus causing the wakelock?
Sent from my LG-D802 using Tapatalk
Click to expand...
Click to collapse
well like they mentioned earlier you can try greenifying whatsapp/viber or other apps(different apps on a daily basis) to try and find out which app is cause the wakelock, but remember that if you use any of these on a daily basis then greenifying them wouldn't be a good idea(unless you only greenify them when you go to sleep and when you wake up you ungreenify them)

I'd probably try your suggestion about using greenify. I usually use whatsapp and viber a lot during the day. My only concern was the amount of battery getting drained at night when I go to sleep so I guess greenifying them at night does make sense.
Sent from my LG-D802 using Tapatalk

Try uninstalling the stock facebook app. It was murdering mine.

AbdulrahmanAmir said:
you might need a battery calibration for your mobile or change the kernel speeds
Click to expand...
Click to collapse
Sorry for my question, but how do I do this?

I've noticed that my bluetooth has been contributing to the battery usage. Even though I haven't been using it and has always been off. From the screenshot, it's been awake for more than 7hrs.
Sent from my LG-D802 using Tapatalk

admp said:
I've noticed that my bluetooth has been contributing to the battery usage. Even though I haven't been using it and has always been off. From the screenshot, it's been awake for more than 7hrs. View attachment 2681088View attachment 2681087
Sent from my LG-D802 using Tapatalk
Click to expand...
Click to collapse
yes but its not an actual drain you can see on the top it has only wasted 5% battery(in 7 hours that doesn't even amount to 1% an hour), even though its off it remains in a low energy state(idk why it does though) if it were actually draining battery then the cpu time would be almost the same as awake time(somewhere around 5 and 6 hours) and percentage drain would be higher but I have noticed that after about 2 months on kk(for me atleast) I had started using Bluetooth a lot once I got kk whether to stream music or connect controller to play emulators my Bluetooth doesn't false positive anymore instead it either shows the actual time it was used for(usually a couple hours every day sometimes 3 or 4 out of lets say a day I got 14 hours total use) and another thing I noticed is if I leave it off it will give me the false positive or if I leave it on all day and let it connect/disconnect to the different devices gives me actual usage time
---------- Post added at 09:16 PM ---------- Previous post was at 09:13 PM ----------
admp said:
Sorry for my question, but how do I do this?
Click to expand...
Click to collapse
to change kernel speeds you need root/custom kernel and I don't know how to do the battery calibration test

I think I found the problem.
When I leave my phone on during the night, I turn mobile data and wifi off, but my connection is still LTE. I was noticing about 10-15% drain as soon as I wake up. What I tried was to set the phone to just use 2G (GSM), still leaving mobile data and wifi off. I woke up this morning with just 3% battery drain.
It's weird though because I get very good LTE reception so I don't think that a poor LTE connection was causing the problem.
Does this mean that LTE really consumes that much battery?
Sent from my LG-D802 using Tapatalk

Android System Battery Drain

Anyone else experiencing a battery drain ~ 28% Android System usage and 23% screen on time (~4.25 hours) with 20% battery remaining. Any solution to this? Probably a wake lock?

Yes battery drain alot
The only solution work for me is turn on upower saving
If you have rooted u cant disable wakeclock service. You can find in forum
Cheer

I disabled the s health app which has helped, still seeing around 20% usage from android system though.

I bet that you have Dropbox sync on. I am not talking about uploading new pictures to Dropbox automatically, I am talking about ur phone downloading all your preexisting pictures from Dropbox. This stupid feature is on by default and killed my battery until it was done syncing. I have since switched off this stupid option. It shows up as android system drain because it actually unrelated to the Dropbox app. It's your gallery app that's doing all the downloading.
Sent from my SM-N910C using XDA Free mobile app

Good results with "normal" use
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honhan0904 said:
Yes battery drain alot
The only solution work for me is turn on upower saving
If you have rooted u cant disable wakeclock service. You can find in forum
Cheer
Click to expand...
Click to collapse
I'm not rooted unfortunately. That really sucks that's there's a wake lock issue... haha I'm tired of having that issue on my Android phones...
huntleth said:
I disabled the s health app which has helped, still seeing around 20% usage from android system though.
Click to expand...
Click to collapse
Cool, I'll give that a shot.
ozaghloul said:
I bet that you have Dropbox sync on. I am not talking about uploading new pictures to Dropbox automatically, I am talking about ur phone downloading all your preexisting pictures from Dropbox. This stupid feature is on by default and killed my battery until it was done syncing. I have since switched off this stupid option. It shows up as android system drain because it actually unrelated to the Dropbox app. It's your gallery app that's doing all the downloading.
Sent from my SM-N910C using XDA Free mobile app
Click to expand...
Click to collapse
Interesting... I do that have on, but I would think it be done downloading now. I have my Note 4 for ~ 3 days now and I have a fairly fast internet connection.

Anyone still using Greenify out there?

on my device disabling location reporting seemed to help a lot with the Android system battery drain

I use DU Battery Saver to turn off all apps and network when screen is off.. also, you can disable apps from running in the background when the screen is off too.. I don't have the screenshot, but I got about 21 hours with 5 hours display using this method.. I'm also getting a 4500mah battery too.. so hopefully that helps.. Also, I tried going into 'ART' mode and found out that the DU Battery Saver Widget went up by 2-3 hours.. so hopefully Lollipop can help extend the battery too.. I found out that under 'Location' in the Settings you can use 'Power savings Mode' for the GPS, and also turn off the Google Reporting and Location (on the bottom)..

I got my phone two weeks ago but i just started having this problem yesterday. I went to turn off location reporting and under recent location request, i saw Unified Daemon and it had high usage. Prior to having this problem Unified Daemon was not in the list. Could this be what's causing my problem?
Edit: I hit force stop and turn off and its now out of the list. I'm going to keep watching it to see if this fixed the problem.
Sent from my SM-N910T using XDA Free mobile app

I'm on n910c, Battery life is quite bad the same as on my 2 year old note 2. I guess only root can help...

On mine, I get an average of 50% deep sleep and 50% at 300mhz with "msm_hsic_host" as the main culprit.
Weird. Monitoring my apps, none of them use wakelock more than seconds per hours.

gqman69 said:
On mine, I get an average of 50% deep sleep and 50% at 300mhz with "msm_hsic_host" as the main culprit.
Weird. Monitoring my apps, none of them use wakelock more than seconds per hours.
Click to expand...
Click to collapse
Kinda strange - I get 80% deep sleep.

are you referring to the "device idle"? haha, thanks, so I can do a comparison too..
pedmond said:
Kinda strange - I get 80% deep sleep.
Click to expand...
Click to collapse

I got rid of my battery drain by disabling Unified Daemon.
Sent from my SM-N910T using XDA Free mobile app

michsu said:
are you referring to the "device idle"? haha, thanks, so I can do a comparison too..
Click to expand...
Click to collapse
No, I'm talking about Deep Sleep as measured by CPU Spy

scoobrel said:
I got rid of my battery drain by disabling Unified Daemon.
Sent from my SM-N910T using XDA Free mobile app
Click to expand...
Click to collapse
What does he do, the daemon?

ok well, unified daemon was a problem but less than this msm_hsic_host wakelock thing.
well, resetting the apnand made the wakelock go away...
weird but now i get 80% deep sleep and battery drain looks normal now.

Vangelis13 said:
What does he do, the daemon?
Click to expand...
Click to collapse
I saw somewhere that it has to do with weather and news updates and since disabling it my weather widget is asking me to tap to add a city.
Sent from my SM-N910T using XDA Free mobile app

Im getting a ~10% drain overnight (about 6-8 hours) from deep sleep. ?
worse than my note 2. Cba to root though

Moto X 1st Gen Battery issue.

I've been experiencing serious battery drain lately.
Lasts around 6 hours tops.
Check out the stats. Anyone know how to prevent this?
Drain is almost 3:40 min / 1% discharge. 
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Check if your phone turns off the display after the display timeout. I have seen this happen in Moto X sometimes.. It just stays awake. Restart fixes it.
How about brightness? Set it in Auto Brightness mode. Check your Settings->Display page and check all the fields. Apart from that Screen taking 38% is surprising.
rishi.gohil said:
I've been experiencing serious battery drain lately.
Lasts around 6 hours tops.
Check out the stats. Anyone know how to prevent this?
Drain is almost 3:40 min / 1% discharge. 
Click to expand...
Click to collapse

I've been having the same problem. I updated a bunch of apps yesterday, (mostly Google apps) and it the battery seems to be better today. It may be too early to tell, but I'm hoping it was one of the Google apps that draining the battery and that it was corrected with the update.

Glad to see I'm not the only one who's battery suddenly got a lot worse. I thought it was Snapchat since I had started using it recently, but the battery usage page doesn't reflect that.

One thing to check is the awake time. If you notice that your device seems to be awake all the time, I'm willing to bet that it has to do with google play services.
If rooted, there is an easy fix via gservices app on market.
Sent from my Moto X using XDA Free mobile app

I'm having the same issue. Really only getting about an hour of screen time these days. When I first got the phone it was 2+ hours. Mostly use WiFi vs cellular for data, which I thought should be more battery friendly. I make sure I don't have apps running... I'm thinking maybe my battery has just been getting weaker over time.
Here's a good read on battery wear http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
If you charge once a day like everyone the battery decreases by 15% after a year.

soxfan37 said:
I've been having the same problem. I updated a bunch of apps yesterday, (mostly Google apps) and it the battery seems to be better today. It may be too early to tell, but I'm hoping it was one of the Google apps that draining the battery and that it was corrected with the update.
Click to expand...
Click to collapse
I downloaded the gapps fixer from the Play Store but after installing it and rebooting I could no longer send e-mails via the gmail app (clicking the "send" icon would do nothing)

guruzen said:
Check if your phone turns off the display after the display timeout. I have seen this happen in Moto X sometimes.. It just stays awake. Restart fixes it.
How about brightness? Set it in Auto Brightness mode. Check your Settings->Display page and check all the fields. Apart from that Screen taking 38% is surprising.
Click to expand...
Click to collapse
Brightness is already set to auto. Also, I've check the settings and display page. Its as it should. I wiped out cache partition and it improved a little. Though I didn't saw significant change by doing that. It still runs for max 6-7 hours. That's it.

have you tried to clean battery stats from recovery?

eldar4uk said:
have you tried to clean battery stats from recovery?
Click to expand...
Click to collapse
Doesn't actually do anything. People need to stop facilitating this dumb myth.
Google said:
This file [batterystats.bin] is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings. That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you. It has no impact on your battery life.
Click to expand...
Click to collapse

rishi.gohil said:
Brightness is already set to auto. Also, I've check the settings and display page. Its as it should. I wiped out cache partition and it improved a little. Though I didn't saw significant change by doing that. It still runs for max 6-7 hours. That's it.
Click to expand...
Click to collapse
May be u need to calibrate your battery. Try to put the phone in charge and let it reach 100% and post that dont remove the charger for 4-5 hours. This is a method to calibrate. Try this and lets see if it helps.
And, I see that you are in H+.. Try using your phone in 2G for a day and observe the battery patterns.

You should clean battery stats from recovery.. Have you tried this?

Mine will drain fast but then it will sit at 1% for several hours before finally shutting off. I have not found a fix and it's been going on for a few months now.

SmokeyDP said:
Mine will drain fast but then it will sit at 1% for several hours before finally shutting off. I have not found a fix and it's been going on for a few months now.
Click to expand...
Click to collapse
u let the battery die out then recharge to full without switching it on. Once complete boot the phone and when booting is complete then remove the charging cable.

Abnormal battery life

I purchased my 6P roughly 2 weeks ago and I'm not seeing this amazing battery life of everyone else's.. The best I've gotten was 4hrs screen on time with 25% battery remaining. I've tried tons of ROM and kernel combinations, as well as being on stock with locked bootloader, the battery life seems worse with kernels, and the same with stock based Roms. Below is my current SOT with stock rooted, stock kernel. Is there something wrong with my battery? Considering calling huawei for a new battery? This is pretty **** battery. My galaxy S5 had better. I constantly check my CPU States, it does deep sleep perfectly fine. No abnormal wakelocks, I don't even have Facebook installed. The 4 hr SOT I did achieve was with greenify and amplify, which I don't think I need for a phone with this kind of battery...
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Depends on a few things. Could be a rogue app, wifi wakelock, or really poor signal.
You could try stock and no apps for a day and see how it performs then.

teh roxxorz said:
Depends on a few things. Could be a rogue app, wifi wakelock, or really poor signal.
You could try stock and no apps for a day and see how it performs then.
Click to expand...
Click to collapse
the apps i use are twitter, whatsapp, tapatalk, slide for reddit, snapchat, instagram, open camera, and neko atsume. thats pretty much it. Of course cpu spy for monitoring, and sometimes i do notice wifi taking up a bit of battery, but even if i disable it and it goes away, the battery life is still poor. I have a moto 360 and I usually have it paired via bluetooth. I also use google now but i set the GPS mode to either device only or battery saving mode. reverting to bone stock google images locked bootloader to see if it makes a difference, again.. even if the wifi isnt draining.. still is poor. I did monitor my signal and i get very good LTE signal all over my city, so I can rule that out. Would huawei honour this request? I am located in Canada if it matters. Also i dont think its app related because i use the same apps on my S5 and the battery is better on it, which doesnt make sense.

Have you tried turning off WiFi scanning and Bluetooth scanning? They're pretty much useless but consumes battery.
Go to Settings > Location > Menu > Scanning > toggle both settings off

fernievidal said:
Have you tried turning off WiFi scanning and Bluetooth scanning? They're pretty much useless but consumes battery.
Go to Settings > Location > Menu > Scanning > toggle both settings off
Click to expand...
Click to collapse
Yes I have, as practice I never have them enabled.
Sent from my Nexus 6P using Tapatalk

So I have had my phone on for two days now and charged back to 100 of course. Total screen on time over that period is 3 hrs.. This is brutal. Phones at 58% right now. I'm noticing this (screen shot) is this the culprit and does huawei do warranty in Canada?
Sent from my Nexus 6P using Tapatalk

Sent from my Nexus 6P using Tapatalk

HORRIBLE battery life?

Long story short is I used to use the S7e, got a Note 7, and now I'm back (thankfully I never sold my S7e).
Last night I put my phone on power saving mode before bed, and in 8 hours the phone had drained 55% and I never woke the screen once during those 8 hours. My Note (or any other phone really) without being disturbed wouldn't have even dropped 5%. The battery shows Android System and Android OS as being the top battery usage.
Also charging is terribly slow. I charged it for about an hour today and it only went up 35%. My Note would have gone up 50-60+% in that same time.
Any ideas on how I can investigate ways to improve this?

Did your phone update?
The latest update turns the Wi-Fi and Bluetooth scanning on even when the services are off.
It was destroying my battery.

My phone is also sucking my battery, Android system is the culprit, even using ez disabled it's still killing my battery. Makes me miss my note 7
Sent from my SAMSUNG-SM-G935A using XDA-Developers mobile app

acardinale said:
Did your phone update?
The latest update turns the Wi-Fi and Bluetooth scanning on even when the services are off.
It was destroying my battery.
Click to expand...
Click to collapse
Not sure if it updated. What's the new version number so I can check?
Is there a way to fix this? Typically my WiFi and Bluetooth are always on anyway, but should be connected most of the time (on WiFi at home and work)

You should show the security update for November if you're fully updated. With the November update, my battery has been awesome.

Double check your location settings, I just looked in mine and they turned on wifi scanning, which I previously had off
Sent from my SAMSUNG-SM-G935A using XDA-Developers mobile app

i have the same issues. Horrible battery life with android system being the culprit. phone also charges so darn slowly.

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My battery life is very location dependent. At home, its great. I get a solid 5hr SOT. At school, its like 3hrs. It was driving me crazy trying to figure out why. but i think It has to do with the horrible cell reception at school, which means i have to use the schools wifi, but then the way the wifi is configured there seems to drain the battery worse than the cell radio. None of the battery stat/wakelock deterctor apps could paint a clear picture if wifi is culprit, which makes it even more annoying. But of youve ruled out everything else, and cant figure out why your battery is draining, I would take poorly configured wifi into consideration.
Also, dont go crazy disabling apps. Battery and performance seems to get worse for me when i disable a bunch of services and apps using EZ Package Disabler or Titanium Backup. One thing i do recommend you disable is carrierIQ using System Tuner but you have to be rooted for that ( the method outlined using EZ package disabler doesnt really disbale CarrierIQ as far as i can tell..you still get diagnostic wakeups)
Also, if you're rooted and applied the V15 fix.zip or whatever its called (which is great BTW) try changing the default governor (interactive) to the ondemand governor instead. It seems to give less stutter in UI and better battery life in my case.

I get about 18 hours with 3 hours screen time. I don't use any power-saving or app-disabling, and I have cell, WiFi, BT, NFC, location, and always-on-display all turned on.
One known battery-draining bug is that if WiFi is turned off, but WiFi scanning (for location accuracy) is enabled, WiFi cycles on constantly and uses a lot of power in the process. You can work around it by disabling WiFi scanning in the Location settings.

sam2c said:
My battery life is very location dependent. At home, its great. I get a solid 5hr SOT. At school, its like 3hrs. It was driving me crazy trying to figure out why. but i think It has to do with the horrible cell reception at school, which means i have to use the schools wifi, but then the way the wifi is configured there seems to drain the battery worse than the cell radio. None of the battery stat/wakelock deterctor apps could paint a clear picture if wifi is culprit, which makes it even more annoying. But of youve ruled out everything else, and cant figure out why your battery is draining, I would take poorly configured wifi into consideration.
Also, dont go crazy disabling apps. Battery and performance seems to get worse for me when i disable a bunch of services and apps using EZ Package Disabler or Titanium Backup. One thing i do recommend you disable is carrierIQ using System Tuner but you have to be rooted for that ( the method outlined using EZ package disabler doesnt really disbale CarrierIQ as far as i can tell..you still get diagnostic wakeups)
Also, if you're rooted and applied the V15 fix.zip or whatever its called (which is great BTW) try changing the default governor (interactive) to the ondemand governor instead. It seems to give less stutter in UI and better battery life in my case.
Click to expand...
Click to collapse
Where can I download system tuner? which app did you use to change your default governor?

Try turning off wifi scanning. The latest Google play services 10.0.84 has a nasty bug that keeps toogle on and off wifi draining a lot of battery in the process. Tell me how it goes.

supac said:
Where can I download system tuner? which app did you use to change your default governor?
Click to expand...
Click to collapse
Google play store. Governor can be changed with system tuner or a bunch of other programs like kernel auditor