yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] bomer1:
1 day, 11 hours 40 mins on battery. Android OS 25% (time on 1h 22m) , Display 23% (time on 1h 19m). Phone basically ran me fron saturday morning to sunday evening, and i've got 25% left.

I think you guys are worrying a bit too much about nothing, if anything, I tihnk it speaks to the reduced power draw in the display, and the increased draw from the increased specs. More Memory, powerful processor and super GPU, and I'm still getting considerably more awesome battery life than on my original SGS, even modded to ****. I leave gtalk/twitter/gmail syncing all day, make a few calls, lot of msging, internet browsing few games here and there. This was just a weekend, so lighter use than when on the train for 2 hours a day, but in general; 2 days of regular use and i've got enough to last me probably another 12+ hours still? Things are looking good.

I'm running XWKE1, via kies, I rooted my stock phone and disabled wifi sharing and the social hubs as I think the hubs were causing some drain. I'd say it still drains about 1-2% an hour, but really, that's not that bad, considering how quick gmail syncing works, how convenient gtalk is (my whole company runs it) and I run my display at 50% brightness. On the SGS, you used to see the display nearly always at 70% usage all the time, if not more. If I had the display on for a full hour or so, it'd drain about 35% or so. Here, I drain 10% per half hour or so. Also, I think the stock samsung firmware is just rolling many processes into the Android OS, thus you're seeing it come up higher, but I believe as others have stated, this is a bit of a red herring. Most likely, people are seeing considerable drain due to syncing issues and I'd definitely be looking at Samsung Hubs here.

Not that it's not worth investigating still, but I think people need to lighten up, maybe even turn off your widget notifier for the exact battery percent and just let loose and enjoy your phone :P That being said, if we can optimise for 3-4 days of light use, all the better, but really, 2 full days of regular use and I'm still rocking a quarter battery? Rock on Samsung!
[Galaxy S II General] earthdome:
firmware : KE2
[Galaxy S II General] DocRambone:
U kidding?

Battery drain in 8-10 hour idle ok?

Samsung messed up this phone...
[Galaxy S II General] :
hey. i want to use the official firmware from samsung, i do not want to use any root or any other app to disable some services installed by samsung. it's the job of samsung to distribute a firmware which will not drain the battery in the current way which makes the phone useless.
[Galaxy S II General] LarcusMywood:
I've had it since the beginning of May, and yes, it's always been this bad. I upgraded to KE1 and am still getting the same results. (Reluctant to upgrade to KE2 as people on my network are reporting issues)

I have a SanDisk 32GB MicroSD about half full with Music, but I've just taken this out to see whether it changes anything. (I doubt it!)
[Galaxy S II General] rumen_s:
problem confirmed

I confirm the problem and think it is software issue. For a week usage I managed to get 2 full days with moderate usage with XWKDD. Yesterday installed XWKE2. After last charge of battery today for 2 hours on idle battery is down to 90%; Android OS is taking 80%. If continues like this may be will revert to XWKDD
[Galaxy S II General] Xailter:
I've got this bug to trigger 3 or 4 times now, so try this yourselves and see what happens:

1. Note your phone's current battery level.

2. Go to the Task Manager and go to the RAM tab.

3. Click 'Clear Memory'.

4. Put phone in idle and leave it for an hour.

5. Check your battery level.

More often then not my phone sucks up about 10-12% battery power over the hour and the battery graph drops a lot.

When this doesn't happen though my phone easily lasts through 2-3 days with moderate usage (light browsing, odd call/text message).

-X

Oh yeah, resetting your phone should fix the battery drain (pull battery out).
[Galaxy S II General] ignign0kt:
The cpu time on android os seems to be higher when the screen its off

Don't understand that one
[Galaxy S II General] =RBL=:
This is mine
[Galaxy S II General] dryspuri:
this is amazing!

Tell us more about firmware, use of sammy's stuff( hubs), more iportantly is it branded(o2), and also which is sdcard u r using?
[Galaxy S II General] =RBL=:
2.3.3 XWKE1 firmware, will be updating to XWKE2 later tonight. It is branded O2 phone only had it from thursday. Charged it to 100% thrsday night, played a little bit, battery went to 90%, switched it off, switched it back on friday morning (was 90%), phone died today about 2 pm. I don't use any hubs/facebooks, etc. Got couple of widgets on my home screen that connects to net regulary.

no sd card
[Galaxy S II General] JuWa:
I don't know if this should take soooo seriously as someone is taking. Sure I can see after unplugging my phone, that the Android os process is eating most or second most of battery, BUT my phone still has 100% after 30min. And I have use it also. So no battery drain issue so far on mine.

Or

Someone really has a problem with the battery...
[Galaxy S II General] AndyCr15:
Now of course everyone has different use, but I would suggest if you've had Androids in the past that would last 48 hours with moderate use that you've been very lucky. This is not normal.

Go through this or any other battery thread for any Android device, the norm is between 16 and 24 hours.
[Galaxy S II General] kreoXDA:
I usually charge at least twice a day, one charging period is in the middle of the attached graph :(

My random-day usage is attached (around home, with decent wireless coverage)

I have latest firmware, Accuweather, News and Weather, Email, Agenda, Clock, 2 Picture Frames widgets are on home screens. It is synching gmail and corporate email on ActiveSync, plus whatever widgets. I have facebook and yahoo mail installed but they do not autosync. Not rooted, everything else is default including TouhcWiz.

Note at the end of the graph the phone is idle for about 9 hours and is losing around 2-3% of battery during that whole time :)

That is when I was sleeping.

And when it was falling down like crazy, I was playing Robo Defense extensively , browsing and reading news, using My Tracks for about 45 minutes combined, and making only 7 minutes of voice calls.

I think it is the activity that kills the battery?
[Galaxy S II General] agent_fsh:
Potential solution stock unrooted phone (KDD, KDH)

I was having fairly bad battery life (not as bad as some report, but dead in about 18 hours with light-moderate use).

After reading Boosted's comments about the Samsung hubs, auto updater, wifi manager and wifi sharing, I disabled them. I did this without rooting, by going into Settings->Applications->Manage Applications. Take a look at all the 'Running Services' and then have a field day force quitting things under the 'All Applications' tab. They haven't started up again since then. This stopped 'Wifi Sharing' from popping up in my usage stats, and I think had an effect on the Android OS usage.

The other issue was Google Latitude kept waking the phone up to track my location. By disabling the tracking in latitude, 'Maps' disappeared from my usage list.

Finally, I noticed that one of the things making constant calls to Android OS was checking the battery. After disabling Battery Indicator, I noticed quite a change in the usage of Android OS.

With all of this in mind, and doing my tests, the Samsung hubs and wifi sharing stuff is definitely a sink, and sucks up battery (an annoyance which should be fixed, but can be disabled with a little effort).

Quite understandably, latitude is chewing battery as it constantly tries to access gps and my data connection.

Finally (and quite ironically) by tracking your battery usage in detail using third party apps is quite possibly stopping your phone from going to sleep by making constant calls to record current usage, and hence killing the battery.

After making these tweaks, I'm now sitting on about 85% batt after about 17 hours of light usage. Suddenly very impressed :)

My phones details are:

PDA: KDD

Phone: KDH

From O2 on Contract.

J
[Galaxy S II General] DocRambone:
My battery thirsty lg 2x lasts 2 days with moderate use, same goes for SGS1

Nexus s may even make 3 days.

Sgs 2 less than 1 day.
[Galaxy S II General] ignign0kt:
I'm new to Android...

So when do we get a custom ROM that's super optimized for battery life? lol :D
[Galaxy S II General] bigmo7:
SGSII is doing a lot better than the SGS for me in terms of battery life...both on GB. I'm getting 2 days out of the SGSII with moderate use but I could never do the same on the SGS.
[Galaxy S II General] sim_jim:
KE2 .. Freezed social hub + wifi sharing + software update ...

that what i got
[Galaxy S II General] DocRambone:
Nice to hear, but then you do not have this bug. Yet.
[Galaxy S II General] bigmo7:
I think I do, Android OS is always 15%+ on battery use...it gets to 20-25% sometimes...
[Galaxy S II General] airwater9:
Interesting
[Galaxy S II General] send2toonie:
I always check the battery graph and without fail I always see a solid blue bar.

Being fed up I start to freeze more stuff in titanium backup; about 15 minutes ago. then turned off phone for another few minutes just check graph and there are breaks in the graph. maybe this will help.

It was two com.amsung.something and imei tracker that I froze.

Maybe this is nothing but I've never see breaks in that blue line before and definitely need more time to tell/test.
[Galaxy S II General] walda:
I am on KE1, frozen many Samsung Apps. Google connected, Mailsync every 30 minutes. Didnt use it that much today. Weather 3 h.

think i am happy.
[Galaxy S II General] DocRambone:
This bug gets serious when you get heavy idle drain, 5-10% battery loss / h
[Galaxy S II General] bigmo7:
Oh right, I've not had anything like that yet.
[Galaxy S II General] kaassema:
You can't use the percentages to check wether you have this bug.

For example: Leaving your phone idle at night will make the Android OS-stats go up, relatively. As soon as you wake up your phone, the screen will suck up most of the power, and thus take a larger percentages of the overall usage, decreasing the percentage used by Android OS.

This of course does not mean the Android OS suddenly used up less power... It just means something else took a piece of the pie as well ;)

So it is better to compare the batterygraph-lines
[Galaxy S II General] LarcusMywood:
Ok, I restored my phone, reflashed KE1, rooted and uninstalled all of the Hubs and Samsung Suggests. It's been idling now for an hour and is at 99% battery, normally it would be down to 90% by now. I'll report back again later...

I also removed my SD card as I only noticed the awful battery life when I put it in... do you think that has anything to do with it?
[Galaxy S II General] jonrwg:
This is mine:

There is a small charging part where I connect my USB cable to comp to transfer some file so I guess it wouldn't effect anything. :cool:

I'm on KE2, frozen all samsung sh*t, push email, wifi 24/7, Facebook and Twitter and weather update every 30min. Use LP Pro twitter and fb widget + scrollable news widget (update every 1 hour).

Pretty good for me but yesterday when I customising my phone it drain quite a lot. Today I'm fairly on average use.

Display: 38% / 2h 4m 13s

Android OS: 34% / 1h 20m 42s

Android System: 12% / 8m 18s

Cell Standby: 5% / 13h 13s (Time without signal= 98%)

Phone Idle: 3% / 11h 7m 47s
[Galaxy S II General] gvoima:
This is kind of annoying. I heavily use this phone and the battery graph is full of different programs and the screen is over 60% brightness a lot of the time. Still the android os keeps itself over 20%.

This phone would have a very nice battery life if it wasn't for this :/
[Galaxy S II General] DrGinge:
Hi all,

I just got my SGS2 2 days ago, and am blown away with its functionality (this being my first android phone, previously an iPhone addict), but I have the same battery life issue.

I followed the initial "charge before use" instructions religiously, I don't have an SD card in the phone and today with what I would call "light usage" (total use about an hour tops) the phone is now at 4% battery. I have bluetooth and GPS switched off, I have "battery saving" mode coming on at 70% remaining.

I don't know how to do screenshots, but looking at my battery usage I get:

10h 29m 5s on battery (now at 4% from 100% charge)

Android OS 33%

Display 17%

Wi-Fi sharing 13%

etc...

Clicking on the graph I see a fairly constant drain, with the bars underneath showing "Phone Signal" as a solid yellow bar (what does this mean?) and wi-fi having fairly high activity, but "Awake" being the most active (although the phone was unused most of the day).

I started on the "DD" firmware and last night used kies to upgrade to KE2 - makes no difference to me.

I'm willing to try anything to improve this (except I don't want to have to root the phone - I'm not interested in hacking the device to make it usable, I'd send it back first).

I'm in the UK on O2 and on my homescreen I only have a few widgets (Sky news, BBC news, Accuweather, facebook, email and gallery slideshow.

Heeeeelppppppp!! I looks like a great device and if I could get it up to 24 hours with light usage I'd be overjoyed!!! I don't wanna have to go back to the iPhone now I've seen whats possible!

:eek:
[Galaxy S II General] sunilkaura:
Dude from my experience Sky News widget is a battery killer..I used it for a while on my old defy and it destroyed the battery; and the defy has brilliant battery life in general
[Galaxy S II General] airwater9:
Guys, it's time to get onto Samsung technical support and log this issue. For ONCE Samsung seem to be really hot on updating a phone's bugs and we've already seen updates for Swype and the auto brightness....the battery consumption one will come soon once we speak up about it.

Not all users are comfortable with forcing shutdown on processes or rooting phones and it's really down to Samsung to find the cause of this and solve it. Suggest you log this with Samsung and get them to prioritise it.
[Galaxy S II General] earthdome:
hmm.so what's actually draining the battery?

got good battery life with light-moderate usage.

- wifi constantly on

- gmail, yahoo mail, twitter, facebook and whatsapp syncing.

- no frozen app

- no force stop

- heavy sms

- light gaming n browsing

10% left after 34 hours of usage.

Android OS: 3h 58m

Display: 4h 11m
[Galaxy S II General] dryspuri:
People, please concentrate on contributing by keeping the discussion alive i am loving this community
[Galaxy S II General] DocRambone:
Its the "suspend" process that go crazy. Install watchdog from market to see it.
[Galaxy S II General] gvoima:
Not sure, but my friend has a zte blade and the android processes doesn't go over 5% at any time. So even 20% seems to be quite a heavy impact.

This applys even on my other friends SGS I.

It shouldn't be this high and I guess we have to wait for google to fix it in gingerbread and then samsung updating it too. :(
[Galaxy S II General] dryspuri:
I must say I am impressed can you give us ute your firmware version and are you using any of the samsung software
[Galaxy S II General] dryspuri:
I totally agree with you as my experience this is true, but if you search online this seems to be issue with android 2.3.3 and it was fixed in 2.3.4 I have posted link in one of my earlier posts
[Galaxy S II General] earthdome:
Yeah.-i have that too. But it doesnt seem to drain my battery a lot and the alert appears less after updating firmware from KDD to KE2

KE2. I use social hub to sync my yahoo mail. And another one is Software Updater for Mobile Tracker while i was trying to use Samsung Dive to track my phone
[Galaxy S II General] walda:
so we have to wait until samsung releases 2.3.4? oO

sent from my SGSII via T*patalk
[Galaxy S II General] dryspuri:
it should not be long!! i am not sure but sammy is playing all cards right, i have a feeling they will not mess this up:D
[Galaxy S II General] artesea:
We still have people quoting percentages, it's the CPU time which will show if your phone has gone rouge.

Has no-one got Spare Parts installed to see which processes are using most of the CPU?

Still guessing that it's just one app (whether installed by Samsung) which is misbehaving.
[Galaxy S II General] ignign0kt:
Can I use titanium backup pro to freeze apps if I'm not root?

Don't want to buy it and then find out I need root
[Galaxy S II General] dryspuri:
you need root buddy
[Galaxy S II General] voodoochild2008:
Has anyone tried getting through to Samsung to see if they even accept there is an issue, if they do then a fix could be due, if they say all seems fine to them then looks like its down to some clever person on here to sort.
[Galaxy S II General] crypticc:
Do a quick search for batterystats.bin

Fully charge, Remove that .bin and then run down phone to empty (phone will power off by self). Recharge until full, plus one hour (can use phone while plugged in after 15 mins or so)

Sent from my GT-I9100
[Galaxy S II General] Tough.Enough:
would Juice Defender help with this situation?
[Galaxy S II General] DocRambone:
No, already tried it, the suspend process locks up in some way.

Disabling data helps a bit, but you get the drain anyway
[Galaxy S II General] AndyCr15:
I have Spare Parts + but it tells me it can't read any battery info? :-(
[Galaxy S II General] Tough.Enough:
I just checked my friend's SGS2, his Android OS is set at 15% ???!!!!!!!!! his rom is pretty much the same I have except the kernal, his (Kernal Version: I9100XXKDH) Vs. mine (2.6.35.7-i9100xwkdd-cl161513).
[Galaxy S II General] rdy2go:
My battery life improved a lot after disabling "Power save mode".

Stock rom, exchange and gmail push, 3g or wifi.

Another confirmation:

The best effect on the idle consumption is achieved by disabling background data.

1% lost in 4 hours
[Galaxy S II General] DocRambone:
This mornings readings

This phone has some serious flaws.
[Galaxy S II General] neubauej:
I havent read the entire thread so i apologise if this had been covered, could somebody with the os bug uninstall maps and see if that fixes it? A certain build of maps wiped out my battery in no time, even though i never used maps. I uninstalled, and batt life was much better..
[Galaxy S II General] DocRambone:
Aleady tried, did not help
[Galaxy S II General] artesea:
what's your wifi policy set to?
[Galaxy S II General] jonrwg:
WOW, your reading is so extreme. :eek:
[Galaxy S II General] DocRambone:
Always on, i know about this "fix"
[Galaxy S II General] mtomi:
I noticed in my SGS2, that when the battery runs out quickly there is process Sharing Wifi Manager that consumes a lot of processor time. When I killed it it reappears, but without processor use.

You can download this widget: Process Monitor Widget and enable Excluded and System to view all important processes and tasks. You can then find out if there is a process that drains the battery.

If in all cases it is connected with Sharing Wifi process then maybe we can write about it to Samsung / Google?

(sorry for my poor English :-) )
[Galaxy S II General] dan13l:
Left my phone overnight unplugged. Pretty much the same story as Doc: 90% to 58% doing nothing.

Android OS accounting for 93% with a CPU time of 5hr 28.
[Galaxy S II General] beppez82:
I got the same issue on wifi and not on 3g HSPDA...if i use my dlink DIR 655 when i put the phone in idle android os become high, suspend and event/0 eat more than 60% of CPU causing drain of 10% and more x hour...

Using another wifi router in that case a vodafone huaweii router problem gone and suspend event/0 stay down (not down and calm like on the sgs1 that uses like 0.5 of the cpu%) and use 10% on the sgs2 so by far is better and the problem is still here.. and i get a 2% (sometimes less) drain x hour in idle all on wifi or 3g is same..plus i i disable all data with JD or superpower these little drain remain not like on sgs1 that with data off don't eat juice..

So OK i can live with that and i can go home with a good battery and a heavy usage but is not as it have to be...and i hope in a fix son.

Like u see 1h idle 20 min display to write these post little check to an italian forum...and 7m of android os...
[Galaxy S II General] rumen_s:
Battery drain

Or may be problem is related with charge cycle or 'power saving mode'? I used S II for a week getting 2 full days moderate use. However, yesterday I recharged phone during which it was off and battery started to drain like crazy - 10% for 2 hours. Later I played games, watched videos, etc. and discharged battery. During night I recharged phone again (this time it was on, as usually) and problem has gone - 97% battery after 6 hours on seems OK. Unfortunately I played with 'power saving mode' too - switched it on yesterday and disabled it last night.
[Galaxy S II General] yhrn:
For me WiFi seems to be a (at least partly) the culprit. For two days I've seen the following with WiFi (sleep policy: Never):

Unplugged charger and did not touch the phone for a little more than two hours. Checked battery and it had dropped around 15%, Android OS using around 98% of that with a CPU time roughly equal to the time the phone had been unplugged.

Now I tried disabling WiFi before charging the phone (mobile data on). After unplugging the phone and hardly using it for around 1.5 hours I was still at 99% battery. After another 30 mins of fairly intense usage (listening to music and playing around with various apps) I was still at 95%. Android OS had used around 13% of that, around 5 minutes of CPU time.

I've had background data and sync on all the time. Not rooted since update to KE2 so nothing removed or frozen.

The only other thing I can think of that I've changed is that I actually created a Samsung account and signed in under Settings->About phone->Software update.

This symptom actually seems to match the Android 2.3.3 bug discussed earlier since, if I understand it correctly, it is related to switching between WiFi and 3G and I have pretty poor WiFi signal at home.
[Galaxy S II General] beppez82:
Got same problem as you, and is due to the wifi router, and wifi driver of sgs2 maybe bad compiled.

As you can see in my post changing the router now i dont have massive idle drain consumption like on 3g.

Cant understand where is the problem cos the dlynk was used for sgs1 also without any problem.:rolleyes:

Yesterday intensive heavy usage lot of idle also to test it out 4h and 30m display
[Galaxy S II General] earthdome:
I agree with this. I had the power saving mode disabled yesterday and my battery seems to be much better
[Galaxy S II General] dan13l:
OK, lets pursue this one and prove it/rule it out.

So: wifi then. Does anyone have the android OS problem with wifi off?

I will try:

Overnight test with wifi disabled

Connecting to 5ghz 802.11n instead of 802.11g

Maybe a different router/access point (think I have a spare)
[Galaxy S II General] Beefheart:
I went to bed last night and got woken up by my phone notifying me it was fully charged about 1.30am (grrrrr!). I then removed the cable and went back to sleep. I woke up this morning to see my battery was still on 100% although Android OS was at the highest at about 70%. However, after using my phone on the way to work for 10-15 minutes, Android OS went down to about 16% and Display shot right up to over 70%.

Not had any major issues with battery since I got the phone about 10 days ago. Always get around 16-18 hours at least with normal use and that's the same as I was getting with my HD2 loaded with MIUI Gingerbread.
[Galaxy S II General] beppez82:
U don't need to do that kind of test while sleep u can use process monitor widget start a record of process and put screen off

Wait 20m and u see (if u are on wifi and if that is eating ur juice) a thing like that

With wifi off, or like be with another wifi unit these

It dont show cpu% but u ca see it on the graph is low and don't eat much CPU like the other one it stay usually around 10% (I'm speaking about suspend and event/0)

Hope these can help cos for me now is all ok.