yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] Robsso:
Glad that this workaround with removing the widgets work for some of you guys but sadly, not for me. I removed all the widgets (actually I removed everything from home screens of launcher pro and even tchwizz what seems to be running in the background) and uninstalled most of the not needed programs, yet still get 20-30% loss overnight.

I figured out that it wakes itself up in regular intervals of about 2mins. Seems to be something that has access to location services (maps taking high % of battery – note that I haven’t touched maps for weeks, nor Sygic navigation which I uninstalled in the meantime and the maps % got even higher).

The only thing I’m about to try is to remove Samsung subscription (I didn’t subscribe to anything else but twitter – this is uninstalled now as well though). This is though a must for me as I really want to keep my device secure with samsungdive in case anything happens to it.

Some of you advised cognition rom… well, I’m not really convinced the rom itself is a solution (while root and froze e.g. wifi share might help indeed some) as the same job (in my case) will do to revert back to factory settings. Doing just that (on KE2) gave me a good 1% loss per 7hrs sleep (enclosed). And that’s after beautiful widgets installed, some of the favourite apps. I don’t recall now if I was signed in into Samsung account, but even after that I got good battery life for about a few weeks. It started out of a sudden as I used the phone, installed and uninstalled apps etc.

I’ll share with you in case I find the freakin’ app that is causing this, but slowly run out of options :(

May the mWatts be with you.
[Galaxy S II General] alien0101:
Hi

As per the post , I also removed all my widgets. But battery drain is still worse.

I have 5-6 accounts setup in my Email application . I guess that may be the problem.

Guys I want to know which are the best tools to track battery .
[Galaxy S II General] Coolhanded:
wifi sharing

For me i found if there were wifi networks i could log onto wifi sharing took a lot of power. at home and work. once i entered the passwords for both work and home wifi sharing disappeared. So unless your phone knows a connection it will always search and drain batt. thats what i found anyway. this may already if been posted so heres a repeat. hope this helps someone. :)
[Galaxy S II General] RogerPodacter:
you realize that you have battery monitor setup incorrectly? it is estimating your numbers based on a 1200 mAh battery, which is the default value. you have to set it to 1650.

also, since the SGS2 cant output current values, battery monitor just estimates using the rate of percent over time depletion. still a good substitute though.
[Galaxy S II General] Sp1tfire:
Thought i'd share my experience with the battery too, even though i didn't encounter the Android OS bug. I'm not telling people how to use their smartphone and i don't think SII battery is great either. I am on stock KE5, no root. I didn't freeze any apps, nor do i use wi-fi (don't have a wi-fi router yet :o) I use the mobile data plan and i shut it off when i sleep cause my plan is not unlimited. I must charge my phone during the night, just to be sure it will last for the whole next day, but i'm pretty much ok with it lasting 1 day. The thing i wanted to share is that after installing a bunch of apps and going to sleep while my phone was at 50 % battery, when i woke up after 8 hours my phone was nearly dead at 1 % battery. Checked the battery usage and didn't see any app that could have caused the drain, but noticed my phone was active all night long, even though the screen was off. Searching through running processes, i noticed an app that i installed the night before, which ran continuously. It was a widget called Phantom Music Control, which i put it on my WidgetLocker screen to be able to switch songs rapidly when listening to music. I tried to kill it and it was starting all over again, so i decided to uninstall it. After that, things returned to normal, no more 6 % battery drain every hour while in stand-by and no more active phone while screen off. Never thought a tiny widget will kill the battery so much. Just wanted to share this, in case anyone happens to install it and experiences huge battery drains.
[Galaxy S II General] rassnik:
what i recognized last night:

when the phone is connectet to the charger, the processes suspend and events/0 consume almost no cpu (0,0-0,1% CPU time compared to running time).

if its disconnected from the charger overnight the cpu consumption is about 4-6%. this is at least 50 times as much!

information gathered with systemPanel.

does this make any sense to anybody?

cu
[Galaxy S II General] CandyAndy:
Well yeah I noticed from that app that it had incorrect value but thought its just a bug. Anyways the default android battery monitor showed the same.
[Galaxy S II General] SiSL:
While I was using Galaxy S I9000, it was "Software Update", another Samsung App that was draining battery at 2.3.3, at 2.3.4 they semi-fixed that state as good news at least...
[Galaxy S II General] EarlZ:
Is it possible to uninstall the wifi sharing app ?
[Galaxy S II General] patboole:
Very interesting post, thanks for all the work.

In having said that, I do think the Kernel has an effect on battery usage as well. I rooted to CF-XXKF2 2 days ago and have started experiencing fairly poor battery usage [images attached].

Usage pattern is fairly light. In this particular screenshot, about 30-40 mins of browsing and then a lot of standby. Occassionally the screen was turned on to check time or for messages. Two email accounts are configured for push, only two emails were received during this period. GPS was on [but not utilized] and WiFi location assist was off.

I only use 2 widgets: Digital Clock on the main screen and Power Savings on a side screen.

As you can see, it has drained quite a bit with the screen off most of the time. The phone seems to be quite warm to the touch as well, a lot more so than before.

The culprit here seems to be Android System [as opposed to Android OS]. Prior to rooting with XXKF2, I had stock unrooted XWKE7 on it and didn't have any such issues [the graph was a lot less steep]. So I don't think I was plagued by the WiFi Sharing drain bug.

Since rooting, I have frozen all my carrier's [Optus] bloatware plus the 2 WiFi Sharing services.

I'll try KF3 tonight and report back.
[Galaxy S II General] hueythecat:
Its not the widgets guys, its most likely the stock rom.

I've bee through everyones pain here.

I'm on cognition 1.07 rom now with no probs.

Check attached - yeasterday: lite average usage, wifi, went for a 1 hour jog with music app.
[Galaxy S II General] lindsaytheflint:
Unfortunately, as we only have one phone each, it's hard for us to know what solves it for everyone. For me, it's definitely certain widgets. I'm on Cognition 1.07, and by reverting the config of one of my widgets, I can reproduce the issue. By taking the widget off, the issue is gone. Black & white, conclusive trigger.
[Galaxy S II General] rhys100:
Ok guys, thought id give you an update as i am facing this problem to, so i tried to find the culprit.

Im running Cognition 1.07. Im using launcher pro as my main launcher and widgetlocker.

I also run the following widgets.

Beautiful widget

Pure Calendar

Switch Pro

Virgin Usage.

and lots of app shortcuts and folders.

I was getting High Android OS usage, as seen in this screenshot. http://db.tt/O9fCJgY

So first of all, i got rid of launcher pro as default and launched twlauncher as my default. Tested, still had battery drain on android os.

Then i disabled widgetlocker. BOOM! No more battery drain. Was going solid.

Now i have deleted all widgets on launcher pro except shortcuts and folders. Will post back with how i go.

EDIT: Have been testing by unplugging for exactly 1 minute, then looking at battery stats and looking at what uses most. Can other people do the same till they narrow things down.

Airplane Mode - NO DIFFERENT

WIFI on/off - NO DIFFERENT

Beautiful Widget - NO DIFFERENT

Pure Calendar - NO DIFFERENT

Widget Locker - BATTERY DRAIN

Virgin Usage - NO DIFFERENT
[Galaxy S II General] hueythecat:
Also of note

I run :

Juice defender

Advanced task killer

Disabled fast dormancy off (*#9900# )
[Galaxy S II General] --saracen:
The solution is simple - 2.3.4 solves it. I had the exact same problem on my Nexus One running 2.3.3 but then with the 2.3.4 update it was gone. Totally gone - my battery life improved dramatically. Now I have the Galaxy SII on 2.3.3 stock and I am facing the exact same Android OS issue I had on my Nexus one running 2.3.3 stock.

So the question is - when are we getting 2.3.4 for the Galaxy S II?
[Galaxy S II General] (•.•):
Never had this Problem, with android os, ok maybe at the first day, but after I removed allmost stock**** and bloatware I didn't had this problem anymore.

The biggest problem is still the display.

Damn I would like to show a screenshot..

I had after 5 hours like

82% display

9% opera

4% androidOS

3% androidcore

...rest

Do you have such high battery drain from the display also?
[Galaxy S II General] iron@ss:
Screenshot...

Try pressing and holding the Home key and a fraction of a second later pressing and holding the Power key... hold both for a second or two (it takes a bit of practice) and my SII takes a screenshot which is saved to /mnt/sdcard/ScreenCapture and displayed in Gallery. Am unsure if this is available on all firmwares but believe that this is a feature of the SII.

Hope this helps. :D
[Galaxy S II General] jony013:
try this..................

http://xdaforums.com/showthread.php?t=1144099
[Galaxy S II General] Mixy:
The data you will be getting from this test wont show you anything. 1 minute? There are several problems, some with widgets, some with certain routers, some we still dont know..
[Galaxy S II General] fjankie:
I always get my battery drain after setting up my google account. And it seems that i have an constant dataconnection on my phone afterwords. a traffic monitor says "com.google.uid.shared" is using the network, there is not much data beeing transfered but i always have an active connection.

I have this issue on whatever rom i try, dosent matter if it is stock, villain or cognition or something else. so my "fix" is having juicedefender deactivate traffic (both wlan & 2g/3g) when screen is off. It gives me the batterylife i want - charging every other day.
[Galaxy S II General] dauckland:
went from 1 day to 4 days

As in title.

Went from 1 day to 4 days with HSDPA, sync, skype, twitter, normal use, reasonable phone calls.

My solution was simple.

I charge my SG2 overnight with the phone turned off.

D
[Galaxy S II General] yupo72:
Hi, when you say "So I removed all the widgets from touchwiz" you mean you have deleted phisically from the phone?
[Galaxy S II General] yupo72:
How can you change the battery monitoring to 1650?
[Galaxy S II General] guent_peer:
@yup72: settings, monitoring, battery capacity - type in "1650", leave the program, restart, done.
[Galaxy S II General] ithehappy:
May I know about which application are you guys referring to?
[Galaxy S II General] guent_peer:
@itehappy: Battery Monitor Widget; At least this was my impression... ;-)
[Galaxy S II General] yupo72:
Oh...I thought it was an android setup and not another app.

Btw, does Battery Monitor Widger works fine?
[Galaxy S II General] :
for my situation it's very easy. battery drain very high if exchange push is enabled. even with gmail push the battery drain is on a normal state.

so why is nobody @ google or samsung able to implement a exchange push solution that will not drain the battery in that way?
[Galaxy S II General] yupo72:
I have 2 questions:

1) can I change battery capacity with the free version or have I to get the Pro?

2) after doing it, will it improve duration of the battery or is this tool only to beetter monitoring the battery use?
[Galaxy S II General] H377:
Hi All,

I have updated my SGSII to the new KF3 firmware on Monday. rooted it using Chainfire's kernel and removed all the apps I don't need using "adb". I use Go Laucher instead of TouchWiz ATM.

I also run/installed the following to init.d scipts:

1.) http://xdaforums.com/showthread.php?t=1111145

2.) http://xdaforums.com/showthread.php?t=1154739

I have GMail and Exchange boxes all set up to Push. And have widget: Fancy Clock also on my homescreen.

Last night I turned off the device and charged up to 100% and then using CWM I wiped the cache, dalvik cache and battery stats in the morning I woke up. But still having the phone on the charger.

Then I powered it up and waited until the battery is charged again to 100% and the phone notified me to plug it off.

Now I'm getting:

Voice Calls 55%

Display: 20%

Android OS: 8%

Android System: 7%

But I think the second script did the job here. Or maybe together? I haven't tested them alone.

I will redo everything this evening and will get back to you with the results.

Some people also say that the battery stats need some days to build up completely and correctly.

Hopefully we will get a final soultion for this. Fingers crossed!

:)
[Galaxy S II General] Jecht:
I'm gonna try and mess around with the widgets. Thank you for useful information!
[Galaxy S II General] BelgianAtheist:
I'm on KF3 and have removed ALL widgets and frozen the following apps:

Ap Mobile

BBC iPlayer

Buddies

Game Hub

Social Hub

Software update

Wi-Fi sharing

Wi-Fi sharing manager

Yahoo! Finance

But still had AOS taking up huge chunks of battery (80%) and the battery going down about 6-8% per hour.

But by accident I deactivated WiFi for a significant time and look at the result (compare the top graph to the WiFi bar and the screen on bar):

about 1% per hour without wifi (AOS not in statistics), back to 6% per hour with wifi (AOS shoots to the top of the stats) and back to 1% with WiFi off
[Galaxy S II General] Pume:
I suppose you've got push email on? By the looks of your awake bar I drew these conclusions. If so then it's the email apk eating your battery.
[Galaxy S II General] liuwenaz:
I will try it tomorrow

Awesome analysis, cheers.
[Galaxy S II General] aydc:
I have exactly the same issue. WiFi is killing my battery. Without WiFi, battery life is acceptable. With WiFi however, it's the worst ever.

However, a lot of people have no such problems, so I think it only happens with certain routers.
[Galaxy S II General] jonny68:
I totally agree with regard to the widgets being the main culprit for excessive battery drainage, i used to have all my screens full of widgets and the battery life was dreadful, i took them all out and it improved drastically, i can live without most widgets anyway.
[Galaxy S II General] ithehappy:
GS II is the only phone I've used so far which doesn't have much effect by turning and keeping Wi-Fi on. In fact I forgot to turn it off some days back and it was on overnight, for about 8 hours and the battery drain was 5%, which usually is 2-3% for me when Wi-Fi is off.

But if you are stating that browsing through Wi-Fi, well then it's a completely different issue.

Regards.
[Galaxy S II General] aydc:
Nope. I did this test for two days: The first day, I tested battery drain overnight with 3G. Left completely idle with nothing running in the background, the phone lost 6% in 6.5 hours. Android OS use was around 40-50%. So less than 1% per hour on 3G, not terrible.

Then I did the same test again with WiFi. The phone was completely idle, battery stats showed no apps that woke the phone up, but in 6.5 hours, the battery lost 25%!

I repeated the test for shorter times and always found that wifi spends around 4-5 times more battery than 3G in my case. Epic WiFi driver coding fail by Samsung.
[Galaxy S II General] ithehappy:
Hmm, 25% is way high. Maybe your ROM!
[Galaxy S II General] jbdeq:
Anyone had any issues with 3g watchdog? Even though set it to monitor to once every hour looking at battery stats seems to regularly do stuff while my screen is off.
[Galaxy S II General] androidkid311:
Why apple dont use widgets :)
[Galaxy S II General] ithehappy:
Stop using Watchdog and Start using ATK. Your job is to not monitor the tasks but to kill them ;)
[Galaxy S II General] vasil:
Stupid question, but I have never tried to switch my phone off overnight... Does the alarm still work?
[Galaxy S II General] ithehappy:
NO. Switching off will not enable alarm function. Just keep it on and enable Flight Mode if you don't want any signal.
[Galaxy S II General] jonny68:
Your severly restricted with an iPhone and can only do what "Apple says you can do" which is one of the main reasons id never buy an iPhone, i cant imagine a smartphone without at least a few widgets i don't have as many as i used to but im sure you'll agree my homescreen looks good with the Fancy Widget PRO clock and weather:)
[Galaxy S II General] rassnik:
Same wifi fail here.

6% per hour with wifi on. 0.5% with 3g. This happens only with the router @ work, not at home. But (!) this does not happen to 3 of my work-mates with a SGS2 on the same network. All on Stock ROMs.

Smells like hardware issues?
[Galaxy S II General] twitceh:
I'm getting much faster battery drain with the WIFI on.... What is the cause? Some people saying Router some saying... really not sure...

Anyone have some information on this? I've been trying to improve the battery on my phone for a while now!

Thanks!!
[Galaxy S II General] BelgianAtheist:
Indeed during peak times my work Exchange account is set to push, Gmail doesn't have any settings, I suppose it is always push.

But why is push mail consuming more on WiFi than on 3G? And I didn't have this with my HTC Desire (rooted and on 2.3.3 too)
[Galaxy S II General] macs18max:
This Did help me saving my battery. I had no interuption on calls or data but always notice my network icon jump from minimum to full which cause battery drain.

Dialing *#*#4636#*#* and chosing GSM in preferred network (for my area) and selection Euro Band by hitting menu > selectband thus increase my battery life to certain extend also giving me full signal indications
[Galaxy S II General] rhys100:
have you got a dlink router?

http://xdaforums.com/showthread.php?t=1097939
[Galaxy S II General] kristin3l:
Hi everyone!

Yesterday i flashed my phone with the XXKG3 2.3.4 Android (i had the XXKF2 2.3.3 android with the huge android os battery drain) but i still have the bug... The android OS usage whas at 50% this morning when i waked up.... (srry for my bad english)
[Galaxy S II General] :
My phone regularly last me an entire day. I charge it everynight. How much battery life are we expecting from it? I always felt 15-18 hours was sufficient.
[Galaxy S II General] kristin3l:
I dunno, 2 full days would be nice :) or at least 1 full day with all the features activated (not freezed :P) of medium->heavy usage
[Galaxy S II General] ithehappy:
15-18 hours mean nothing. 'Screen On' time it is what matters, it should be around 5 to 6 hrs depending on the other functionalities, so it could be used in 15 hours or 30 hours or even in 3 days.

Regards.
[Galaxy S II General] EarlZ:
I normally get 7hrs ~ 8.45hrs of screen time, what does that mean to you ?
[Galaxy S II General] JuniorGG:
I bet your "Android OS" is perfecly OK. I really doubt this often mentioned Android OS "bug" even exists.

In fact, you have left your phone doing almost absolutely nothing for hours, therefore it has done almost nothing except running the "Android OS" process.

50% is simply the RATIO of battery eaten up by the android OS process, that is obviously high since there were almost no other processes running.

But the ratio does not tell you absolutely nothing of HOW MUCH power was drained from the battery, which I bet was really very small (perhaps 3% in 8 hours?).

Just try leaving the phone awake with the display on for a long time, and see the effect on the percentages. After one hour or two, your "Display" will climb up to 40 - 50%, other processes will appear showing various percentages from 2 to 10 percent or so, and the percentage of the innocent "Android OS" process will fall down to 10% or even less, since you will then be comparing the small drain caused by that process with much higher drain caused by other proceses, and especially by the display.
[Galaxy S II General] JuniorGG:
That you use the phone only for staring at still images (test screens?). :D
[Galaxy S II General] JJEgan:
Junior as in school ???

jje
[Galaxy S II General] kristin3l:
I think the android os drain the same battery even when it is at 50% (in idle mode) or when is at 10% when i use the phone :)
[Galaxy S II General] RogerPodacter:
i would bow down to you as a master if those are real numbers! next time check the display under battery history, click thru, and post the display time.
[Galaxy S II General] ithehappy:
I already had too much comedy tonight.
[Galaxy S II General] mihaicp:
Since I have updated my rom (orange Ro official update, still 2.3.3) my battery lasts longer. For example before updating it lasted for 12 hours (the most!). At the time of writing these lines I have 1day 9 hours 45 minutes and...counting :D (normal usage: 1,5 hours of voice talk/22% ; display 2h29 min/22% ; Aos 1h8min/21%; a little bit of wifi; took 10 photos with camera; sent 3 e-mail with attach->photos; ~10 sms sent/received; a little bit of xda reading) I'm sure it will last untill morning (now it's 2 o'clock in the morning) but i'll charge it because at 8 o'clock I have to go to work :( I am very pleased about this update comparing to 12 hours stanby/usage.
[Galaxy S II General] angelomaldito:
Hi guys, the following link http://xdaforums.com/showpost.php?p=16224449&postcount=13 refers you to the results of a simple test which I did with KG3 firmware. It compares the battery life with Wi-Fi and sync on all the time and the battery life with Wi-Fi and sync off most of the time, except when actually using it (internet browsing, e-mail checking, android market, etc), of course with the same pattern of usage in both cases. The differences are huge, as you can see (18h v 44h battery life).

Therefore, I strongly recommend you all not to leave Wi-Fi and sync on all the time, as it is likely drain you battery, as it did with mine in my simple test.
[Galaxy S II General] reidar.ostrem:
Why should we not be able to use the features on the phone we bought?? :-)
[Galaxy S II General] angelomaldito:
Of course you can use it, but like you should do with your electricity and water at your home, use it with moderation and do not unnecessarily waste it. I didn't make less phone calls or less internet browsing during the test. The only thing I did was to turn off Wi-Fi and sync when not actually using it. :rolleyes:

You always can leave Wi-Fi and sync on all the time if you want, but do not be surprised if you have poor battery life then. ;)
[Galaxy S II General] JJEgan:
That matches up with my sleep tests 2% drain per twelve hours becomes 5% drain with Wifi and Sync on .

jje
[Galaxy S II General] BelgianAtheist:
The lowest drain I had was 1.5%/hour during the night (wifi/data/sync ON, screen off) VERY happy with that.

With any kind of screen usage it quickly leaps to 5-7%/hour.

I got Darky's KG2 R2 rom and tried everything to get better battery life like no widgets, lower sync rates, juicedefender ... but I guess I'll have to live with it and surround myself with chargers ;-)

I do have one problem, in my car I have a Brodit holder/charger and with certain apps (mainly apps that use GPS and data like Navigation or Trapster) the phone doesn't charge but actually looses battery power (rather quick too like 2%/hour) has anyone else noticed it? Just on the homescreen or making calls doesn't have this behavior, the phone charges normally.

Too bad we can't see the actual power drain like I can on my Desire with Current Widget.
[Galaxy S II General] Japka:
Hi there.

I have installed Lite’ning Rom v1.5. Everything is working ok, but yesterday before sleeping I had battery 80 %, today after 6 h it drops to 1 %. I have data transfer turned off, also Gps, WiFi, ... Also before 2 weeks it drops from 100 % to 70 % after some hours with no using.

I have to add, that my battery held up for 4 days once with no particular using.

Any ideas plz?

Thx for answer.