yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] bjb_nyj101:
Is this a joke? You claim good battery life or "pretty nice runtime" yet your display is only on for an hour, and you didn't even make a 20 minute phone call? I'm sure we all could get that kind of battery life if our phones were sitting in or pockets for 20+ hours

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[Galaxy S II General] bakewelluk:
Yes, to be fair this definitely shows a barely used phone, but surely a large part of this thread is discussing battery drain whilst idling?
[Galaxy S II General] zkyevolved:
I agree. I have been keeping up with this thread and everyone seems to have issues with CPU while idling. Not while in use. 50% and over one days use is good. Now. Use it hardcore and let's talk ;) come on mugen! Give us a 2100 mah oem battery ^^ haha.
[Galaxy S II General] sohanlon07:
I assume nobody has a timeline for a 2.3.4 release for this phone. I'm getting by fine with the battery now but still, it'd be nice to be able to play a game or two on breaks in work, listen to the radio and use the net a bit without having a red battery by the time you leave the office. Also, wifi definitely makes the phone last a lot longer than 3G.
[Galaxy S II General] lasersocks:
i find that if i keep wifi off I get significantly better battery time
[Galaxy S II General] Robsso:
Right, so let's discuss figures in use. I'm less concerned by the idle consumption as this is something that I could work on/root cause the issue of this drain.

Don't get me wrong, I'm suffering by this issue pretty much now as during the night the phone didn't go to sleep at all (unlike me for 9hrs) consuming 51% of the battery. I blame newly installed JuiceDefender (free) in optimal settings.

But issue I'll likely never be able to solve is the drain in usage.

Worst case scenario observed - 25% in 24mins by playing RoboDefense.

This is almost 3.7W consumption which I cannot tolerate. Not even mention the fact that the device is getting hot beyond my pain threshold.

I'm considering returning it and going back to HTC as I never had issues with Desire like that. It had pretty crappy battery life, but at least I knew what should I await depending on my usage. With SGII I get surprised every day (or twice a day) what it will be...

It’s shame as otherwise it’s an amazing piece of technology.
[Galaxy S II General] chalid:
This thread is about "Android OS process eating away battery life", which is not the case with my sgs2 and that means the battery life - taking that process into account - is pretty good. Where's the problem? Of course higher usage drains the battery more - like with any other phone. But that's not what that thread is for.

However, I don't consider my phone usage that low. Here's the current battery graph with 3g only (no wifi/2g):

phonecalls: 39m 41s

display: 1h 57m 55s

android os: 1h 11m 12s

internet: 30m 12s
[Galaxy S II General] dryspuri:
sir, you must be one of the luckiest', i Must say :D:D
[Galaxy S II General] victorinoxs:
My battery usage chart looks just like yours. I didn't have any battery drain issue before but all of a sudden it just started happening. The phone is awake all the time; not sure what's doing it....it wasn't like this before...It could be some app that I installed, but I have yet to figure out which one.
[Galaxy S II General] Robsso:
So I did a factory reset.. .problem solved. For now at least.

Installed few games and apps, phone is not getting hot anymore either, nor I see the high drain.

At least I know it's a software issue and don't need to return the thing.

Btw. I didn't logged into any services at all at first (sadly, I needed to log into google to use android market eventually), left stock apps with wifi use for location off and the freakin' Wifi sharing process started with Wifi on anyways. Though now, it seems, it does not have any effect on battery consumption.

I'll keep an eye on this while re-installing all of my apps now.

p.s. funny thing I observed was that the device have charged itself in my pocket/hands - guess my energy level is pretty high today :)
[Galaxy S II General] yajur:
after installed titanium backup i freezed few application and i got good result

wifi for about 1hr and 15min

phone call just 15min only

video play back for 15min

music for 10min

sms 23

got 1day and 6hr with 33% of battrie left

but iam not happy to freez lot of application then what is the use of getting 800$ mobile ?
[Galaxy S II General] sstanescu:
Hi guys (lurking here for months)

I'm coming from galaxy S where I have used a no-name 3000mAh battery with some excellent results (no worry for 3 days in a row). Now, with regrets from this pov, I have the S2. New, with KE7, rooted with insecure kernel, I had terrible runtime, with almost full drain in 16-18 hours.

After reading the thread, I did all the steps below (sorry, I was not very amused so I have tried everything in one shot, my priority so far was not troubleshooting):

- change network from 3G to 2G (GSM only)

- deactivate My location/Use wireless network

- log off from Latitude

- disable/enable fast dormancy

End result: after 1 day 3 hours, 63% battery left, basically with same usage profile (~25 min calls, sms, ~50% from time WiFi with autosync). AndriodOS is now 1:24h.

Now I will try re-enabling the services disabled before. But for now, result is satisfactory. My big suspect is the network (Orange Romania).
[Galaxy S II General] Josippo:
Hi,

I have had the same issue with Android os. It has disappeared.

I have made hard reset. Did not help. Than I have read that launcher pro is saving the battery and clearing memory often with task manager. That helped me. But I think it's more the clearing memory than launcher pro, every time I want to put the phone away I clear RAM memory with task manager . Android os is now on 6-12%. I am happy with my battery life now.

I will test now with stock launcher.

Maybe this helps somebody. That's why forums are for.

Josip
[Galaxy S II General] yajur:
let me try it :)
[Galaxy S II General] asti009asti:
very useful post :-)
[Galaxy S II General] nicpol7:
i did the same and have the same result as you...

android os at about 9-10%..

but also i have this dialer apk also on 9-10% and only drops if i reboot the phone..
[Galaxy S II General] yajur:
Yep mine android os is reduced to 9-10 %
[Galaxy S II General] rdy2go:
Stock launcher is not a battery hog imo. Uninstalling some Samsung apps and aggressive auto killer and it's like having a new device without battery drain problem!
[Galaxy S II General] daleski75:
My experience is pretty much the same as yours and I think if you leave it then it eventually sorts itself out.
[Galaxy S II General] NIK516:
yep me to but my os creaps up every now and then, but the more I use it the better the battery is. lol so strange?
[Galaxy S II General] pik1:
same here. as I mentioned in another thread (http://xdaforums.com/showthread.php?t=1108376&page=2) i turned off almost everything but left mobile data on, and left the phone this way over night, then turned on syncing and all other stuff one after another. no more draining, far from it!

i am running on battery for 1d 15h 32m now, and still have 33% left!

no root, no factory reset... just stock rom ke7
[Galaxy S II General] busky2k:
Well here's a great example of the phantom battery drain;

Was running very well for about 18h runtime on 2G/no data – only 15% of battery used – until I decided to switch to 3G+HSDPA to check emails for about 5 minutes. Switched the data/screen off and the phone just stayed awake eating the battery. I couldnt believe the phone ate 20% of battery in ~3 hours with no use. I couldn't isolate the problem so I just restarted the phone and its back to normal.

Samsung really have to get on top of this. My phone is factory stock KE2. Unforunately I cannot post to my screenshot since I'm a newb here.
[Galaxy S II General] Robsso:
You can attach files I guess, just scroll down a bit.

Pik1, how did you get the KE7 update? Was it stock? I don't have it available via phone nor Kies (I don't want to root as yet).

Apologies if this is off topic.
[Galaxy S II General] Vaxbox:
I think for the most ppl the problem will be the suspend bug as described in another thread. Its the same for me and i already tried anything to fix/minimize the problem.

Things i tried:

- cfroot 3.6 ke7

- tb pro freeze all apps on safe list

- dormancy dis/enable

- monitor with watchdog and reboot if it gets to high helps temporarly

I guess most of us just have to wait for a fix in 2.3.4
[Galaxy S II General] nicpol7:
after 10 days with ke2(o2 uk unlocked phone) i can say that i now have a 2 day battery life BUT

1...at some times some apps can start the social hub and wifi sharing drain..if i dont see that and reboot the phone those 2 drain the battery in 15-20 hours..i am not sure what apps can start this..

2..i always have this dialer app at around 10%..

3...android os is always at anout 15% which is normal..
[Galaxy S II General] busky2k:
Ah here we go. Attached now. I reckon the drain had to do with the FastDormancy bug. I disabled FD via the test menu and now the phone signal bar changed to yellow weirdly. We'll see how this goes.

Btw Im running KE2. No updates available for my phone via KIES. Its a German model (pain in the ass).
[Galaxy S II General] Xarpios:
After 20h of usage my battery was on 27% - forgot to take a screenie sadly - but just took them (after 10 min of charging)

Wasnt much usage, 1h of music and 40 min of vid and a few texts, mails and phonecalls -and around 1h of messing around with looks of home + lockscreen.

Normally i drain it in one day - 10 morning till 10 night (10%ish left)
[Galaxy S II General] MisterSosa:
which is pretty impressive if you have a look at your awake time, for multiple hours it is a solid bar! This makes me wonder whether the unfortunate users, will gain much from a 2.3.4 update, since it should fix the suspend problem, that you clearly have but does not affect your battery life.

I have no reason to complain about mine (currently 80 percent left after 9 hours), but this might affect other people that think that 2.3.4 will solve everything!

Any thoughts?

EDIT: do you have mobile internet? I see you stating "reading mails", but no wifi usage, so I assume you do, but then I am baffled about the battery life...
[Galaxy S II General] ethridgt:
I know a lot can effect battery life, but what would you consider average battery life to be for you, since you have had some time with the phone.
[Galaxy S II General] MisterSosa:
Are you asking me?
[Galaxy S II General] cmd512:
Your awake solid bar is a bug with 2.3.3 and WILL drain your battery. Look here, I had the same issue but fixed it:

http://xdaforums.com/showthread.php?t=1094666
[Galaxy S II General] zkyevolved:
I now have Wifi Sharing eating up my battery life xD Will this 2.3.4 update fix THAT!? lol. I hope so.
[Galaxy S II General] BarryH_GEG:
I just read through 20 pages in the Galaxy S forum post on the 2.3.4. upgrade they received yesterday. It appears 2.3.4. fixes the suspend process bug that's been eating battery life. So, all should be well in the kingdom soon.
[Galaxy S II General] manuvaidya:
to all, pls install liet pro 1.3 ROM , the android OS bug is fixed in that rom.... i could see a drastic improvement in battery life after flashing this latest custom ROM based on KE8 firmware.....

all of you who have this bug, pls try it & post ur experience here....

i am happy finally before the 2.3.4 update...
[Galaxy S II General] droidluck:
I am running litening 1.2 will give 1.3 a try later on thanks for this update
[Galaxy S II General] zkyevolved:
Here are my latests
[Galaxy S II General] rapidstar:
Battery life is great on my GS2, I didn't do anything to optimize, running exchange, gmail, many calls(2 hrs), ~1 hr browing, ~1 hr emails etc.,
[Galaxy S II General] dseo80:
on STOCK you should get ~3 days in standby. (all radios except 3g off, autosync on)

DO NOT DELETE wssync*.apk, DRMUI.apk and DRMProvider.apk (also maybe SisoDRMProvider).

For some reason this causes the statusbar to update continuously (in logcat: onDataActivity)

which prevents the phone from sleeping. causing massive drain on battery during standby.

additional apps may cause more battery drain. as will using your phone. (active continuous use will only be ~3-5 hours)
[Galaxy S II General] simacca:
Disabling Fast Dormancy on my o2 UK model flashed with stock KE7 XEU seems to have helped my battery life.

*#9900# to disable.

Tip I got from another thread :)
[Galaxy S II General] popy2006:
Installed Litenin v1.3 (KE8) but my battery also drain :(

Android-OS 44%

Battery drains in about 3h from 100% to 70% with no usage :(:(
[Galaxy S II General] Silver420:
Same here. Android OS over 50% though thats with it on idle (other than yahoo email sync which doesnt have freq settings)

Hopefully 2.3.4 will be out soon if its already been released for the Galaxy S
[Galaxy S II General] aroy7:
My main concern is that my provider wont roll out the update from Samsung anytime soon :/
[Galaxy S II General] Mew178:
Same thing happening here. My battery life droped overnight from 80sh% to 60s% this morning. In about 12 hours.
[Galaxy S II General] Silver420:
erm... thats bad? :confused: lol

I calibrated my battery last night for the first time, can report that my battery has lasted longer :D
[Galaxy S II General] blue265:
I have been testing this problem over the past week and it looks like when I leave my wifi on at home while connected, it will get up to between 60 - 80% android OS battery usage. I will also lose about 10% battery overnight. However, when I turn wifi off, it will stay around 12% Android OS battery usage and I will only use about 1-2% battery overnight.

I have frozen wifi-sharing and all social hubs. I've tested with fast dormancy on and off with same effects.

Hopefully 2.3.4 does fix this and that it comes soon. Otherwise I will just start leaving it on mobile network for the majority of the time unless I am at home and want to do heavy browsing
[Galaxy S II General] lsj_87:
i found a solution for the battery improvement, i tried to factory wipe the phone and use try to use it. it seems the battery is improved.
[Galaxy S II General] zkyevolved:
I did that the first thing when I got mine. I am not having "issues" with my battery life. Turned it on, signed in, and turned it off, reset and here I am!
[Galaxy S II General] djsaad1:
my battery life was perfect out of the box, best battery life I have had on any smart phone I have ever used.

I don't understand how some people are getting great battery life and others are getting horrible battery life. It's not like horrible and not so horrible, we are talking complete opposites. It just doesn't make sense.
[Galaxy S II General] rdy2go:
It's only temporary, battery drain will be back unless you use advanced task killer and freeze unnecessary applications.
[Galaxy S II General] dlwnew:
I hope I am not repeating anything but I have not read all posts in this thread, but I don't get what everybody is complaining about. It seems strange that you are all looking at the Android OS using the battery but from what I can see it is only using the same as any other app on the phone for instance if your phone has used 20% battery in 4 hours but you have not used it then you should expect app that run all the time to use the most % of battery i.e. Android sys 50%, Android OS 30%, Display 10%, Cell standby 6%, Phone Idle 4% this only means the % of battery used during this time if you used your phone to play a game or surf the net for 1 hour then you would expect the % of battery use to change to Display nn% Android OS nn% and so on.

I hope you understand what I mean.
[Galaxy S II General] Umek85:
yepp, sounds logical to me too

checked first with 59%, after playing some minutes it dropped down to 34% and the display percentage went up.
[Galaxy S II General] popy2006:
But why takes android OS just 3% battery on my desire (Also idling most of the time)?

On Friday my battery drains so fast that my sgs II went hot near the back camera :mad:

it drains to empty in about 12 hours with minimal use, thats too bad!

Ill hope 2.3.4 fix this anoying issue!

With the currenty battery life you could put this phone on a table and put an drink on it (ill prefer captain morgan :p ).

With this drain its not a smartphone!

cu

pOpY
[Galaxy S II General] darkoroje:
The process that should take most time while the phone is not being actively used is " phone idle" . Android OS should take very little timer and the fact that it is fact taking most time indicates a problem in a driver or a system application.
[Galaxy S II General] djfatrod:
I've had the phone for about a month and this has just started happening to me.

I was getting about 2 days battery life and then all of a sudden a few days ago the battery started discharging very quickly.

I check the battery usage and there is Android OS at the top...

I have not made any major changes. Unrooted, stock rom, wi-fi and gps off most of the time.

Definitely a bug.
[Galaxy S II General] Sleepycat3:
You guys do know that the % values shown all add up to 100%? And that the percentage is related to battery usage and not "active time". So for those who use their SGSII as phones where the screen is mostly off, you will have the other active items such as display, browser, individual apps, etc will all have low battery consumption percentages. Since those are low and Android OS is the only other one using up battery in the background while it keeps the OS running, checks your e-mails in the background, runs your wallpapers/widgets/clock, then of course it will have an extremely high percentage.

For those who have Android OS really high, just do this:

Turn your screen on and browse the net for 30 minutes. You'll actually see the Android OS percentage decrease just because now the display, 3G/wifi and browser are starting to use up a larger proportion of battery.

As I said, the percentage is not based on time. It is based on battery usage in mA. Since phone idle takes up very little battery power, you can have phone idle for a stupid amount of time but as it consumes less power than Android OS and also less than display, phone idle will always have a lower percentage number on the battery usage screen.
[Galaxy S II General] RogerPodacter:
Unfortunately its software based and you can review the power management code. The galaxy phones are incapable of providing current mA readings due to the max10740, max10741 series of fuel gauges used in all galaxy phones, nexus s, etc. HTC phones however use types of fuel gauge such as ds2784 which do provide current mA readings.
[Galaxy S II General] popy2006:
On my desire with same usage (idling most of the time) the Android OS is about 3%!!!!! The battery lasts a few days!

SGS II with same usage Android OS is about 60% and drains the battery empty in about 12 hours :(:(:(:eek::eek::eek:

There is something wrong with the firmware!!!!!

cu

pOpY
[Galaxy S II General] Sleepycat3:
Something is not right if you are draining your battery empty in 12 hours without heavy usage. I am currently at 8 hours and 58 minutes, have 70% battery remaining and Android OS using up 55% of that usage. My usage today has been light with some browsing, youtube and phone calls. Still, today's usage pattern will give me 30 hours of battery life.
[Galaxy S II General] Sleepycat3:
Yes, it won't be 100% spot on accurate, but it still will have an upper limit of the battery voltage as 100% and a lower limit as 0%. Everything in between is divided equally and allocated an mA value which corresponds to an equivalent battery delta voltage. Not the ideal solution for it does provide for some form of monitoring assuming that the voltage drop as the battery is discharged is linear and repeatable each time.
[Galaxy S II General] DrGinge:
Yes, we all understand what you are saying, however those who have longer battery life all seem to have significantly lower android OS %, whereas those who are suffering ALWAYS have a high number - regardless of usage.

So while its not a good indication, it is definitely a symptom of the problem.

In my case, I've now had the phone for about a month and I've noticed huge variances in the battery drain for no apparent reason. Some days I won't get from 9am to 5pm with little use, other times I can get into day 2 with moderate use and still have 70%+ remaining.

I've been watching the Android OS% regularly and with pretty much consistent use (a little browsing, email syncing, 1 or 2 phone calls a day) on the days where the battery drain is high, the android OS% is high - on low drain days, it is a low %.

I think this is simply an OS bug and we will have to just hope that 2.3.4 fixes it, and that Samsung get their finger out and get the 2.3.4 release to us quickly.
[Galaxy S II General] DJTaurus:
Main problem with battery drain is when i use wifi for browsing.....the way battery dains reminds me of the old htc desire....except that if i wont use wifi battery can last up to 2 days with normal use.I ve also deleted wifi sharing.
[Galaxy S II General] Sleepycat3:
I have to say that with mine, it is the opposite. If I don't do much with the phone, Android OS% is high. Just like today where I used it for browsing in the morning and lunch time, plus some youtube video watching but it is considered light when compared to my normal usage which actually drains the battery flat within 9 hours.

When I am using the phone heavily like I would a tablet, Android OS% is actually low, with the display taking the highest percentage followed by Dolphin browser. Android OS then goes back to 3rd place with about 12% usage. Under this usage pattern, I can drain the battery in under 4 hours and the phone feels hot both on the screen and on the battery cover near the camera.

So it is really odd that you have high Android OS usage when you have heavy usage. I've been monitoring as well and the only process that causes me grief is wifi sharing which can pop up, set my CPU to over 1GHz constantly, uses about 20-30% of actual CPU cycles on OS monitor and also heat up the phone enough that I can feel it. In just 5 minutes of the process going crazy, it would have used up about 2% of my battery capacity. So if I actually leave it as is without killing it, the battery would go flat within 4 hours of standby.
[Galaxy S II General] popy2006:
i totally agree!!

The drain of the battery dont depends on the use.

Also had days where is lasts for about 1,5 Days with no problem (same usage - most idling). In this case android-os was about 35% (also very high).

On other days, like yesterday is drains in about 12hours to empty :(

I am comming from desire with very good battery life.

Copied all my apps with titanium backup (but no system data and settings!)

So it couldnt depend on any installed app (because they are the same)!

On my desire there was 2.3.4 running.

Let us all hope samsung will drop the 2.3.4 release soon - which hopefully fixes this major-problem!

cu

pOpY
[Galaxy S II General] rXpCH:
Hi guys, I also have those energy consumption issues !

But this is what I found Android OS : 40% (more or less) Android System 15%(more or less).

When I use the wifi all day (without data activated) I end up with 30%-40% in the end of the day(from 6h30am to 10h30 pm).

If I'm on data my phone is at 50% in 3 or 4 hours.

If I disable the data and the wifi, I lose 2 pourcent over the night.

Is there a 3G issue ?
[Galaxy S II General] busky2k:
Sounds like me. As soon as I use 3G data (HSDPA), my battery life goes to the ****pot (and the OS stays awake, raping the battery). If I use data on 2G (GPRS/EDGE), then its pretty reasonable. Better yet, sparse use of data and this phone will last me an easy 3 days...