Develop Bugs

why does android OS and android system cause the most battery drain?

not sure what is up but Display normally is the biggest drain if i use my phone a lot. however i recently noticed that android OS and android system are almost equal, if not more drain on battery. What is up?

drcrappants said:
not sure what is up but Display normally is the biggest drain if i use my phone a lot. however i recently noticed that android OS and android system are almost equal, if not more drain on battery. What is up?
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with custom roms,my battery drains like 1%/3min approx ,but i don't like the screen time I'm getting.

Android System has always been one of the top ones in the list. Tap it and you'll see it contains a bunch of processes run under that heading. Android OS typically should have somewhere around 4-7% if I'm remembering right.
If you're having problems though, try following so of the advice given in the many battery threads and stickies on xda, and use Better Battery Stats to hunt down any problems with specific processes and wake locks.
Sent from my SGH-T999 using Tapatalk

ridiculous don't you think?

the kernel is bugged and also since its on 5.0 lollipop

What strikes me odd is that something else didn't drag it down. Then I see the stats are about apps only, which don't take into account cell standby or screen on time.
The key thing to look at is that your phone has been running for 5.5 hours there from full charge, and it only went down 7%. That means if you keep it up, you could run it for over 3 days without needing to recharge. Nothing wrong with that (in the new world order). That's what my old phone could do (sometimes 4 days), and it had a better mAh to screen size ratio than his device (2460mAh : 4" vs 3000mAh : 5.5"). I have yet to get those kinds of battery stats with this one (down to 70% by the day is done vs 80% with the other one).

Yeah. It's unthinkable that a company like Asus can't solve this problem fast enough. Maybe they didn't get the permission to put 5.1 on their phones yet

sirsomething said:
Yeah. It's unthinkable that a company like Asus can't solve this problem fast enough. Maybe they didn't get the permission to put 5.1 on their phones yet
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They definitely have "permission", Asus has been historically reliable with updates, but we'll see I guess.
Sent from my ASUS_Z00AD

cmendonc2 said:
They definitely have "permission", Asus has been historically reliable with updates, but we'll see I guess.
Sent from my ASUS_Z00AD
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Yeah, let's see. Meanwhile we spend our battery cycles like ****

I blame Google. They should never have released the buggy mess that is 5.0. Sometimes companies have no choice what to out on the phones....I'm sure Asus had this phone in the development pipeline with 5.0 as the target well before all the bugs of 5.0 were revealed. And the way Android relies on nearly full reimage for major updates is idiotic, and also Google's fault. 5.1.1 is essentially a different OS than 5.0

joel.maxuel said:
What strikes me odd is that something else didn't drag it down. Then I see the stats are about apps only, which don't take into account cell standby or screen on time.
The key thing to look at is that your phone has been running for 5.5 hours there from full charge, and it only went down 7%. That means if you keep it up, you could run it for over 3 days without needing to recharge. Nothing wrong with that (in the new world order). That's what my old phone could do (sometimes 4 days), and it had a better mAh to screen size ratio than his device (2460mAh : 4" vs 3000mAh : 5.5"). I have yet to get those kinds of battery stats with this one (down to 70% by the day is done vs 80% with the other one).
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the funny thing is my standby time is completely fine its when im using the phone that it drains fast I have amplify,greenify,powernap running and it still drains also did all thats possible to save as much battery as possible.
I also installed the Debloated Rom by Harfainx I know for sure that its lollipop 5.0 thats cause this problem cause every time I check the battery stats in settings Android OS is at 40-60%...... thats just ridiculous

The sooner we get 5.1.1 the better! Are you listening Asus?

They are shameless at the moment

Downgrading to Android 4.4?

I am very upset with low battery life. It holds the charge ok while I am not doing anything, but overheats when I use the internet, GPS or camera. Power loss is about 20% per hour, which is unacceptable. I am shocked how come they can even bring such products to the market.
I recall that power consumption significanlty increased when I upgraded Sony Xperia Z1 from Android 4.4 to 5.
I have a rooted LG G4.
I want to install android 4.4 on it. Is it possible to install standard version of Android 4.4 or the phone will stop working?

I can definitely relate to the bad battery life, I lose 20%+ when using my phone during my lunch break, it's insane.
Unfortunately the bootloader is locked with no workaround currently, so there is no way to flash custom ROMs. If there was, you'd be hard pressed to find a developer working on an older Android OS as most tend to use the stock ROM and customize it or use a newer version of AOSP Android.

geoff5093 said:
I can definitely relate to the bad battery life, I lose 20%+ when using my phone during my lunch break, it's insane.
Unfortunately the bootloader is locked with no workaround currently, so there is no way to flash custom ROMs. If there was, you'd be hard pressed to find a developer working on an older Android OS as most tend to use the stock ROM and customize it or use a newer version of AOSP Android.
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Thank you for information. I hope they will come up with something, like downgrade capability or Android 5 fix.

Go into battery stats and see what's draining your battery. Try installing GSAM battery monitor or BetteryBatteryStats.
Maybe you have email set up to constantly check or something else, but there is something draining the battery. Your drain is not normal.
I am getting easily 24 hours between charges. I'm getting a few hours of screen on time each day. My battery drain overnight is about 1% or 2% per hour. For example, I may go from 78% to 68% overnight. I think that's high because I had my G3 on Lollipop doing 2% or so most nights. I leave on WiFi and data all night.

What is the truth about the Android OS battery drain?

First, sorry for my bad English.
Everyone using ZF2 knows about what I'm talking about here: if you look at the battery graph in the settings, Android OS is probably responsible for most of the battery usage. :silly:
At first I was horrified about that, but then I realized something was off, something that I notice everyone is ignoring: Android OS drain is too high. I mean for me it's always 5 to 8 times higher than the second that is the Screen. The reality is that I can still have 4 to 4.30 hours of screen-on time, 3% drain for 7 hours of stand-by at night. So just think about it logically, what if we can make the Android OS work "normally", which is that Screen will be on top of the list and Android OS somewhere below, then how long my screen on time will be? You know what I mean? We are getting rid of a drain that is 5 times higher than Screen on the list! Does it mean our Screen on time will now be 20 hours???
So, I came to a conclusion that this issue may be in fact an error in the data. Maybe nothing was wrong but the Zenfone 2 team messed up the calculation for the battery usage and ended up showing a ridiculous result. what do you think about this?

3% overnight ? my phone get 1% ^^
srr my bad english

VinzNguyen said:
3% overnight ? my phone get 1% ^^
srr my bad english
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wow that's crazy, how is that possible for you do you think? :angel:
I'm using stock, disable most of the bloatwares but I'm keeping all Asus important ones such as power saver (I always set it normal however), start manager (disable all except OTTs and sms ... you know why).
Does that mean I'm partly right? If Android OS truely eats up so much battery power, how can we achieve such low drain during stand-by time? It's not logical :silly:

dongnguyen2301 said:
wow that's crazy, how is that possible for you do you think? :angel:
I'm using stock, disable most of the bloatwares but I'm keeping all Asus important ones such as power saver (I always set it normal however), start manager (disable all except OTTs and sms ... you know why).
Does that mean I'm partly right? If Android OS truely eats up so much battery power, how can we achieve such low drain during stand-by time? It's not logical :silly:
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http://forum.xda-developers.com/zenfone2/development/script-zenui-debloater-v1-t3174541
i use Extreme v2 script.
i disable all app in auto-start manager
power-saver is normal mode.
i go to sleep 9pm ---> 6am. my phone just get 1% ^^
u can try this.
p/s: my phone ZE550ml. maybe your ZE551ml with 4GB ram , cpu 2.3GHz could eat battery life more than mine ^^
i really srr about my bad english

VinzNguyen said:
http://forum.xda-developers.com/zenfone2/development/script-zenui-debloater-v1-t3174541
i use Extreme v2 script.
i disable all app in auto-start manager
power-saver is normal mode.
i go to sleep 9pm ---> 6am. my phone just get 1% ^^
u can try this.
p/s: my phone ZE550ml. maybe your ZE551ml with 4GB ram , cpu 2.3GHz could eat battery life more than mine ^^
i really srr about my bad english
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Click to collapse
thanks for the link. However I don't want to root my phone, I just bought it a few weeks ago and I will keep it intact until I get Marshmallow, I used to be addicted to Rom Flashing and it nearly killed me haha. I can use the lists for reference, anyway.
Yes my phone is 551ML 4GB ram, probably that's why I have higher drain when stand-by. Because I have lots of experience with Rom modding I believe I'm not missing anything with my current settings.
Ps: your English is fine, don't worry :fingers-crossed: judging at your username I bet one penny that you're from the same country as me

how many times its been said..zenfone 2 stand by time is superb ...its when its use the drainage is fast..why fast because of incompatibility of zenfone 2 screen( cheap screen ?) and intels hardward... ...so no matter how you adjust it will never be a 2 days single charged phone. anyway ive had a nice experience with my zenfone 2 ..gave it to my brother and bought nexus 6...wanted to have 6 inch phone anyway....

dongnguyen2301 said:
thanks for the link. However I don't want to root my phone, I just bought it a few weeks ago and I will keep it intact until I get Marshmallow, I used to be addicted to Rom Flashing and it nearly killed me haha. I can use the lists for reference, anyway.
Yes my phone is 551ML 4GB ram, probably that's why I have higher drain when stand-by. Because I have lots of experience with Rom modding I believe I'm not missing anything with my current settings.
Ps: your English is fine, don't worry :fingers-crossed: judging at your username I bet one penny that you're from the same country as me
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i think so. bạn ở đâu ?? mình hcm kakaka

The main responsable in battery drains is usually not Android OS, but Google Play Services that screws everything

This issue has already been discussed to death all over the place in different forums. There are many reasons why the battery life is not good on ZF2 some of which are what you pointed out. The main problem is with 5.0 itself, this was and is a known problem, no amount of "tweaking" is going to fix a problem with the OS itself. This is why many people wanted the 5.1 update to no avail from Asus. Did it fix all the problems? No, it did not but it did stop a lot of the battery drain.

VinzNguyen said:
i think so. bạn ở đâu ?? mình hcm kakaka
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same here, HCM, haha we can have a cafe some day haha

floridaman said:
This issue has already been discussed to death all over the place in different forums. There are many reasons why the battery life is not good on ZF2 some of which are what you pointed out. The main problem is with 5.0 itself, this was and is a known problem, no amount of "tweaking" is going to fix a problem with the OS itself. This is why many people wanted the 5.1 update to no avail from Asus. Did it fix all the problems? No, it did not but it did stop a lot of the battery drain.
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I agree that 5.0 is not optimized and it's not the best, but people are talking like Android OS is a crimminal, I think that Android OS is just taking a bit of battery, but definitely not 5 times higer than the screen as explained above like instead of 5% of battery it is consuming 10%, it's not good, but not a disaster either :silly:

gipikay said:
The main responsable in battery drains is usually not Android OS, but Google Play Services that screws everything
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Click to collapse
it might be, I used to greenify Google Play Services, but on some phone it will lead to a lot of force closes. Supposed it's the cause, it also can't be 5 times higher then the screen, or else our phone won't be able to maintain >4 hours of SOT, isn't it? :silly:

No, 5.0 is and was a disaster. It had so many bugs it should have never been released

That is for sure...

Poor battery life

Hello, i have a problem with my A2 lite. Battery life is just 2days and 4h SOT. Suspect is system consumption 44%. Have you experienced that someone? I have to try factory reset, or what? Thanks for help.

You should definitely factory reset the phone, you should not be below 6h SoT with this battery... Im regularly getting around 8 hours of SoT depending on what u use...

Same here. 1 day after the november security update and I have almost the same numbers as the OP. Coincidentally, 2 days ago my ticwatch e started draining battery dropping to almost half of what i was used to. I suspect the update messed up something.

No strange battery drain since November update on my side. Maybe an app you use was updated at the same day which is causing the drain.

Facing the same issue after november update. Same usage, same apps. Might have to factory reset
Edit: careless of me lol

So I did factory reset. Issue with battery continues. Android system and google play services using most battery, altogether about 30%. SOT is basically half of what it used to be. Google play services are on the latest Nov12 version.
Edit: Whatever is broken, it also affects the battery life of my wear os device (ticwatch e). After connecting the watch to old cell phone (ascend p7) battery drain of the device stopped

It was the fault of the november security update and now there's another security update which is going to fix the battery draining issue!

Let's wait few days to see. Installed yesterday and the phone battery looked promising... Until paired with my wear os device (Ticwatch e). Then the battery drained started again, on both devices. Google Play Services still have top usage. (I tested the watch with my old phone running on lolipop, all ok there, so it's got definitely something to do with the latest updates)

Had same issue with 1st november patch, now the 2nd seems to have fixed: again slow draining...fine!

I've also experienced bad battery consumption since my 2x November updates, from 9+ hours SOT to 5 hours (approx 2 days to 1 day)

have the same problem, bought the phone, it was offering me upgrade to android 9, i did it, and the battery cannot hold for more than some 29 hours.... i cannot see whats draining it unless i root it, because Gsam cannot see which apps specifically. anyone still have the issue on android 9?

santos1911 said:
have the same problem, bought the phone, it was offering me upgrade to android 9, i did it, and the battery cannot hold for more than some 29 hours.... i cannot see whats draining it unless i root it, because Gsam cannot see which apps specifically. anyone still have the issue on android 9?
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Yes, I have the same issue, on Android 9 I can't get more than 6h ScreenOnTime. That's the reason why I prefer Oreo

santos1911 said:
i cannot see whats draining it unless i root it, because Gsam cannot see which apps specifically. anyone still have the issue on android 9?
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Click to collapse
GSam Battery Monitor can be granted some rights by adb (no root needed), so it can show consumption per app.
Have a look at
GSam Battery Monitor -> Menu -> More -> Enable More Stats
I ususally have less than 2 days with 6-7 SOT. If it's less, GSam shows me, which app consumed more than it should.

Howdy2 said:
GSam Battery Monitor can be granted some rights by adb (no root needed), so it can show consumption per app.
Have a look at
GSam Battery Monitor -> Menu -> More -> Enable More Stats
I ususally have less than 2 days with 6-7 SOT. If it's less, GSam shows me, which app consumed more than it should.
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Click to collapse
mine says i have to root it in order to enable it. in the same menu.
been browsing the MIUI forum, some people having the same issue, the guys who dont have that issue, are claiming its adaptive batterys fault and that it will normalise in a week or so, when adaptive battery does its thing.
sound odd, but ok.
also, it says that rollback to oreo is not recommendable because some functions could get buggy.

I had a problem after upgrading, downgrading and upgrading again. Was apparently caused by a modem firmware issue. Reflashing the modem from 10.0.3.0 fastboot image fixed it for me.
Showed up as "system" but nothing that could be pinpointed with GSam (root) other than high load in the kernel.

santos1911 said:
also, it says that rollback to oreo is not recommendable because some functions could get buggy.
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Click to collapse
not true. i have done the downgrade without issues. Oreo, in my opinion, is very optimized for our mi a2 lite....im waiting a better Pie version. if you want to read how to do the downgrade here the link https://forum.xda-developers.com/mi-a2-lite/help/sim-card-issue-downgrading-pie-9-0-t3874350/page6

okay so what should i do now? after downgrading from 10.0.4.0 pie to 9.6.11.0 oreo and rooting and it got even worse than ever. Please advice me fast!
http://imgur.com/gallery/ny3AWee

SadToni said:
okay so what should i do now? after downgrading from 10.0.4.0 pie to 9.6.11.0 oreo and rooting and it got even worse than ever. Please advice me fast!
http://imgur.com/gallery/ny3AWee
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I don't know how you downgraded your phone but I've downgraded mine from 10.0.4.0 to 9.6.11.0, battery life is better than February update. Phone is snappy and had no issues at all (except for SIM2 which I don't use). I've also rooted it with Magisk.