Battery drain by Android-System - Huawei P9 Plus Questions & Answers

I just updated my VIE-L09C432B103 to version B161 without any problems. Thanks a lot to acer73 for collecting the firmware at this point!! After the update I recognise a significant improvement in battery life. I used to have a very high consumption by the android-system process (about 1200 mAh in a day of normal use). Did someone experience something similar or was there just something corrupted on my phone?

Others had the same problem with the Standard P9

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[Q] Battery Calibration

Hi fellow O2x users -
Has anyone else had a go calibrating their O2x battery? Either using marosiges' battery calibration app, or manually removing the batterystats.bin file?
I've done the following calibration cycle:
Charged to full via the wall charger, mV figure was ~4188 mV, which I've read is normal, then removed the batterystats.bin file;
Used the phone till it powered off on its own, mV figure was ~3450 mV, which is higher than normal (~3200)? Or is this normal for the O2x?
Recharged the phone uninterruped back to 100%, mV figure was ~4180 mV, so nothing wrong there again either;
Normal usage/charging of the phone over 4 days, and battery uptime is worse than before calibration. (Uptime was worst immediatly after calibration, and gradually improved, but it never got better than before calibration).
Thinking that someting had gone wrong, I repeated the calibration and observed the same mV figures as above. So far, after another 3 days, battery uptime has not improved beyond the previous calibration, and definitely not to the level of what it was before calibration.
The only things I can think of are:
The O2x requires a higher minimum level of charge to power the dual core chipset and CPUs/GPU;
The O2x has a custom batterystats.bin file to begin with, and allowing the android OS to recreate the file doesn't work.
Does anyone have any insights? I'm running stock Australia 10b ROM, rooted, with some of the bloatware packages disabled. I'm not affected by reboots/BSOD's or lock-ups.
(Marosiges' original thread, [APP] Battery Calibration - EASIEST WAY! - Version 1.2, is in the "Android Development and Hacking" section, which I unfortunately can't post to yet.)
Thanks, this forum rocks!
EVERY android phone/device I have ever owned has this problem. I just don't see what the battery stats file is used for if we just have to keep deleting it. None of my other phones have had this stupid file and they could ALL read the battery percentage just fine and as a side note also lasted longer I had a thought of making the file read only so the phone could not write to it and see if that makes the phone read the battery from the actual battery without miss informing us using the batterstats.bin file ?
Sent from my LG-P990 using Tapatalk
stevvie said:
...they could ALL read the battery percentage just fine and as a side note also lasted longer...
Click to expand...
Click to collapse
That's what I was thinking/wonderng - Li-Ion battery packs have built in circuitry that handles its state, without the need of a software layer.
Although it seems that other android phones are able to discharge to a lower voltage (to ~3200 mV) - i.e. they have more usable capacity? I'm wondering why the O2x goes off at ~3450 mV...and if that's normal.
My best advice is to avoid using stock.
It is too irregular.
If the 3G signal is weak i get constant 3G and GSM hopping which drained the battery in 2h.
But if it was good it lasted way longer.
not sure about the shutdown voltage, i'll give it a shot later
hmm i think mine shuts at 3450 as well maybe even higher, idk
but mine lasts for a day with medium usage.
i tried to look into this earlier and my battery drained to 3350ish before it shut down on me.
i guess that's its limit. i'm running on stock:
BIN_LGP990AT-00-V10b-ESA-XXX-APR-21-2011+0
I'm currently calbrating my battery as I flashed a new ROM, phone was now just shutting off at 3369 mV!
Hopefully battery performance gets better soon!
Deleting batterystats.bin did get me better battery life. But after 6 days I had a huge drain.
Rebooted phone, removed .bin again and it's going ok again....
I'm not particularly wanting to calibrate my battery too frequently - full discharge cycles are bad for the battery.
At 30% charge this morning, my voltage was at 3700 mV. If you use 100 mV as a rough gauge of 10% charge, that would give me ~3400 mV at a 0% charge level.
I guess it's just normal for the O2x battery to be flat at ~3400 mV.
If there are any other O2x users out there who have different voltage figures do make a post. Thanks!

Increase battery life with android

Hi!!! I've tried lot of Android versions and the onlyone that doesen't freezes is FRX07 ( System Build ) by XDAndroid but my X1 start warming up and the battery discharges quickly.
battery usage says that the phone's standby drains the most of the battery charge.
anyone nows how to increase battery life with android?
And the the battery is even displayed as full...but with winmo I can see the real level of the battery, so it isn't a problem of the battery.
Now I've tryed to install JuiceDefender and the phone is a little less hot.
(I'm sorry for my bad English )
It seems to be a problem with all android builds, from my experience with Android, the overclocking of the processors is the culprit, (733+ MHz, from stock 528MHz) coupled with some of those ROMS being run off the memory card, switched to NAND version, and the major problem is battery calibration now, trying to figure out how to fix that,

Battery drain.. kernel (android os)

Hi everyone just got myself a HTC One and I've been experiencing quite bad battery life, usually start the day on full battery around 8am and by 4-5 it's dead or near enough, this seems quite bad for me since my iPhone with a much smaller battery lasted a lot longer, so I downloaded GSam battery monitor and something called kernel (android os) is taking 30% battery usage, is this normal or some kind of bug? I took some screenshots of the battery usage so if anyone could help me out or wants to see the screenshots please let me know, thanks
I've done a factory reset and also running stock version of android updated to latest firmware

New to BBS - Trying to identify mystery battery drain on my OP3T

Hi - I have a OP3T loaded with NOS 9.0.
Most folks on NOS 9.0 have said that they are seeing great battery life (about 0.5%/hour drain when idle). I am usually seeing about 2%+/hour drain when idle, and I haven't been able to isolate the problem. The folks over at the OP3T NOS 9 thread recommended BBS and posting here.
I have BBS purchased and installed, and I have attached my dump file. There's a lot of stuff in there!
Can anyone provide tips on how to analyze the dump file to identify the mystery battery drain?
Thanks,
GJ?
Adding a second BBS log file for approx. 8 hours of overnight idle time. I was losing 2..3% / hour over that time.
BBS says that my phone was in Deep Sleep 84.7%. I've seen 5%-10% better on Nougat, but this doesn't seem too bad. I don't think that's enough to be losing 4x as much battery life as I saw just a few weeks ago.
Could my problem just be that my OP3T battery suddenly went bad?

Battery life is worse after Android Pie (9):

Hello!
I've been experiencing worse battery life on my Nokia 8 since Pie upgrade, I haven't installed any apps nor services...
Note that the battery improved -but not as good as Oreo- after calibration using an app...
Are you experiencing the sane issue? Or should I further investigate?
Thank you..
yes
Same here. I got 12 hours screen on time once on oreo but now, it is a dream. Battery drains fastly due to background services. App restriction doesn't work as well as oreo's restriction. So, this situation causes battery draining. Also there is a weird thing i've faced, battery drains quickly from %100 to %95. I am waiting for Maintenance Release impatiently.
is battery life on oreo really that good?
I'm using pie since day 1 and never got more than 7h sot and 1.5 days.
My battery life is dire since pie, I was impressed with the battery in the 8 until this update, I cant even make a day without having to charge. When I say day I mean from 7am to 10pm as its left charging overnight.
Before pie I could quite happily last 2 days between charges, I'm not a heavy user, initially I thought I must be using the phone more. But I'm actually using it less just so it makes it to the end of the day!
Somehow it's worse again today, dead by 4:30!
Basically just checked phone to see the time, around 10 minutes of faffing in the morning, rebooted it before charging last night incase sonething was using battery. Madness!
For me, I've given my phone a factory reset before I installed the Beta labs/initial final(V5.110, December 2018-January 2019) build. Despite that, I did notice my battery life taking a hit when running this iteration of Pie. I was at most getting not more than 5 hours of SoT on average. And I do use my phone a lot throughout the day, the camera, web browsing, videos and social media. Meanwhile on Oreo, I can get 6 hours on average no problem. Sometimes even 7 hours if I'm lucky.
After updating to V5.140(February 2019) with Adaptive Battery brought in, I seem to have gotten back my average SoC just like when my phone was running Oreo. Running 5-6 hours on average. I'm not sure if Adaptive Battery has anything to do with this since I did notice the improvement immediately. I also disabled some of the Evenwell crap before updating to V5.140, so that may or may not have an effect.
If apps restricted didnt work then try manually restrict each app go to ur up hold it then info Then choose battery from there change background restriction
Ifaced this problem in beta when iwas sleep and wake up morning my battery was almost below 20 percent but i manually restrict all apps and its working 100 percent ?
Sorry to heat that. Have you tried installing some apps like better battery stats to see what exactly is saying up your battery? If your phone is rooted consider installing ForceDoze from f-droid and maybe WakeBlock to regulate some wakelocks that may be the cause of your terrible battery life. I have been able to get great battery life using the latest put version. See screenshot below from a few days ago.
I know that this is old thread but i have solution which i use with my nokia. change default launcher to another lightweight. This works and my battery feel better.
I should of updated, battery went back to normal after newer updates.
However, biggest thing for me, using DNS666 Ad blocker has seemingly doubled my battery life, might be a combination of just gotten bored of the phone or blocking all the ad's saves battery, or a bit of both, its also made the phone feel a lot more responsive overall, i'm using Squarehome as my launcher so maybe that was affecting the battery before?
Maybe which update can fix battery life? I rooted my phone and can't download latest update.

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