yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] mickliq:
I've had my device for 2 days. I would say I'm a "medium" user at best. The biggest battery drain I *should* have is Exchange Push since that's always on, and things like FB every 30 mins, stocks every 15 mins.

I generally like to keep Wifi off, 3G on, BT on. Even on standby in that mode, I lose ~7% an hour. If I actually start using the device (checking FB, reading Engadget, Bloomberg, CNN, browsing) then things go downhill fast.

I've narrowed down my problem to 3G. For some reason, I suspect that the signal is not strong, and so it drains the battery. If I leave it on Wifi only, then it's doing the same background data but I lose 5% an hour even while having the screen on, downloading apps, etc.

I suspect maybe a new radio might help, but in the meantime, I need to modify my behaviour to keep Wifi *on* when in the office, and probably 2G when I'm out and about until I need the burst of speed.

I'm travelling next two weeks, I suspect when I'm on a different 3G network (AT&T and then T-Mobile UK) I may have different results.
[Galaxy S II General] pet family:
Been reading this thread trying to find some tips to improve my battery life.

My first charge only last 10 hours, on my second charge now with 11 hours and 28% left. Now very happy after comparing with others. Expecting to have atleast 24 hours.

From these 11 hours, only 1.5 hours display on. Looks not very impressive isn't it?

FB every hour, Seesmic every 30mins, Push GMail and another one IMAP Email, Accuweather widget, 3G Watchdog widget, Browsing approx. 30-45 mins, Auto Brightness. I think that's about it. Pretty standard usage for me.

Still trying to figure out anything I can tweak to improve my battery life. Any idea?

The best picture I can give, haven't rooted it yet, so no screen capture. (Or is there any apps to screen capture unrooted?)
[Galaxy S II General] pulser_g2:
Modify your behaviour? Nah, there's apps for this iirc. Tasker or locale should be able to do this based on your rough location, or the availability of said wifi network... And it can likely throttle it down to 2G until you need it... TBH I would need to reinstall it to check, but it should be able to do that.

Or look at adding the "Power Control" widget?
[Galaxy S II General] a_friend:
This is really odd my SII switched off several times over the past few days. Now I'm charging the battery which is supposed to be dead and the phone is showing me that its 3/4 full.

When powering up the phone can see the same level 3/4 level on the display for a split second then an empty battery icon then the phone powers down.

I believe I have a battery calibration issue, what ever that is.....
[Galaxy S II General] Beards:
All you have to do is press BOTH the 'Home' & 'Power' button at the same time.

You will then hear a camera click and the screen is then saved to a folder named 'ScreenCapture'. :)
[Galaxy S II General] StickyGeko:
Nooooo I dont kniw whats happened, yesterday I got 20hrs today ive got only 12hrs ive used it less than yesterday
[Galaxy S II General] vimto25:
that was like me, first day was like 16hours and second is 12 hours with less use and screen brightness min,

today ive got 12 hours out of it as ive just had to put on charge and used mod/heavy with 6 hours of screen being on (playing games,browsing ect..).So maybe this is good with screen on for 6 hours and wifi on most of time( set to off when screen off).

dont understand why many people are getting much much more.

my mrs Galaxy ace is doing better and she on it all the time lol facebook galore :D
[Galaxy S II General] pet family:
Oh yeah, another stupid thing from me. Read this before and I forgot. I mistakenly remembered it was "Menu" & "Back" button.

Thanks for your help.

Any idea why mines battery not very good? But a couple other person had a similar problem like me though. I think I need to figure it out by myself..
[Galaxy S II General] vimto25:
A few have froze many apps that many wont use such as social hubs,Im, ect... this will make battery performance better also perform better.

Id like to freeze some but not a clue how to root it.

I no this isnt relevent to this thread but does any1 have a clue why my clock widget keep just stopping? i used the standard widget and that did it all the time but if id restart device it will then show correct time, i have installed another widget from market and its doing the same, any help would be gratefull
[Galaxy S II General] Beards:
Have you been running the battery down til the SGS2 switches itself off?

I do that with all my phones for the first 10 charges and always manage to reap the benefits.

I'm currently on my 5th charge and it is improving all the time... The last charge gave me 21hrs 17mins.

But don't forget, everyone has different habits.... Only you will know how well or bad your phone is performing based on your usage pattern. :)
[Galaxy S II General] vimto25:
5th? how long you had your phone for? you never stated how long your screen has been on for, i think a few tell porkys unless they screen shot there stats, this way people will no what is good,average,bad.
[Galaxy S II General] pet family:
Ya, it looks like I will try to freeze some useless apps if I couldn't get my battery lasted for 1 day or so. But I want to try without freezing it first I think.

You can find the step to root here

For the previous 2 charge, yes. Oh ok then, I'll try to keep doing this until around 10 charges then. Many people having the same experienced as yours, I should try this.

I agree, that's why I want to find out how to make my battery perform better with my own habbit. I use suggestions in this thread as a referenced and since couple persons manage to have 2 days battery life, I expected mine has atleast 1 day :D
[Galaxy S II General] Beards:
Edited: Had to recheck my times.... (several times, wife bless her disagreed).

Re my previous post on charges ~ My error it was not 5 charges, it should have read 4 charges.

The phone is now on it's 4th charge.

Times to the best of my recollection

Usage 1 ~ Wed 15:00 - 20:30 = 5hrs 30mins

Usage 2 ~ Thu 05:30 - 12:45 = 7hrs 15mins

Usage 3 ~ Thur 18:00 - 01:30 & Fri 06:30 - 20:15 = 21hrs 15mins

Although the readout did say 21hrs 17mins.

Usage 1 was a video on a loop to burn down the battery rapidly so that I can then start to achieve my 10 charges as quickly as possible.

Usage 2 was a mixture of morning surfing, then I again left it on a video loop to once again do a rapid run down of the battery.

Usage 3 was the first time I used the phone properly. This was done with a mixture of surfing, phone calls, texts, music, The Market, etc. etc.

Hope this helps.

Once things settle down I'll do a screen grab.
[Galaxy S II General] turborider:
omg the battery life of this baby is awsome,start 100% when i went to work and listen music and i went to internet most of the times during the day,then in afternoon i watched two 1hr programs on bbc iplayer and from 7pm till 11.50pm i was listening music and still had 9% in it,with mine other crap HD2 could not get that much only listen to one album and the battery all gone,just love SGs2 :D
[Galaxy S II General] pet family:
Have a small question, which one is more of a battery suckers, Wifi or Data-enabled? (Somehow I forgot what is the better term of using internet from the phone network haha)

Assume both have the same stability in terms of signal :)
[Galaxy S II General] AndyCr15:
If you have a decent WiFi connection, I've always found that to be better for my battery.
[Galaxy S II General] StickyGeko:
What's happening? Ive hardly anything running...most of the time it ws asleep then used it for Mainly. Browsing but through battery is doin my nut in...what's with the huge drops too
[Galaxy S II General] pureheart:
What software are you using to monitor the battery usage?
[Galaxy S II General] AXIS of Reality:
Ok, that's actually a very good question, because it's not clear-cut. ;)

Here's how it works:

- Battery life with 3G data connected but doing nothing (ie: on but not web browsing, downloading, etc) is HIGHER than WiFi connected but doing nothing.

- Battery life with 3G data connected and active (downloading stuff, web browsing, etc) is LOWER than WiFi connected and active.

So in ambient usage 3G should last longer, but in heavy usage WiFi will last longer.

On a separate note, my SGSII seems to be lasting significantly longer than my Galaxy S battery life did. This is without doing any battery tuning stuff like running the battery fully down or anything.
[Galaxy S II General] jonrwg:
My battery life seems bad. 6hr left with 45%. This was after my first full charge. Wifi constant on but nt active. Just transfering photo and music from Kies.
[Galaxy S II General] AndyCr15:
After just one charge, you've been writing loads of data to the phone and you're heading for about 10-12 hours life? Not bad I would say... I managed 9 hours on my first charge, did 27 hours yesterday.
[Galaxy S II General] tameracingdriver:
My phone arrived this morning with 50% battery life exactly, and I've completely flattened it now after quite a bit over 3 hours constant screen on use. That means up to 7 hours use on wifi with the screen on so far. I think thats excellent personally. My Incredible S lasts just 4 hours or less, and the iphone maybe is around the same as the SGS2, and I always rated the iphone highly for battery life on a smart phone. This must surely be the first android phone that actually has what I would describe as decent battery life.
[Galaxy S II General] lesterp:
The Atrix battery life is very similar
[Galaxy S II General] jonrwg:
Hopefully mine turn up well after a few good charge. :)
[Galaxy S II General] falconeight:
I charged it to full and got 11 hours of crazy use out of it through day one. It seems to be a bit better than my Atrix.
[Galaxy S II General] dk206:
Ok left this morning came back home just now.

battery status 31%

battery usage 21hr 37m 27s on battery

awesome stuff. Made a few calls no longer than 10 mins each. Texting browsing for total 2hrs on 3g. MP3 player on the tube there and back again totalling 1hr.

Auto sync + 3G on all day.

No widgets on auto refresh apart from the default weather widget I got with the phone. Really good and have always wanted a phone that can take my heavy use throughout the day without turning off. I was annoyed because around 9pm coming back home I always listen to music on the tube and often it would shut down on me.
[Galaxy S II General] jonrwg:
Drop to 85% in 50min !!

Wifi on, GPS off, auto sync, frozen all samsung apps except social hub. This is my second charge. Anything wrong here? :(
[Galaxy S II General] dk206:
Those of you getting poor battery life. Can you switch to stock apps please? And see if it the same?

Use TouchWiz4

Use stock apps.

And post your battery date

. It is really strange. I bought it on Tuesday. I never drained it. Just charged it after coming back from the shop and have always charged it around 25~30% when I got home, and now it has been 5 days and battery life is as good as ever. I never use a 3rd party task manager either.

My battery: 2011.04.22

p.s This is my golden rule. I never play games or do anything that will heat up my battery and phone whilst its plugged in. Not good for the phone. Therefore I only charge it just before I fall asleep.

Also don't forget this is our first week with our new shiny SGS so our "typical heavy/moderate usage" might actually be longer and more extreme than normal since we can't take our hands off it :D
[Galaxy S II General] jonrwg:
I use TW and stock apps. except those samsung hub which i freeze it. On the day i bought, at 50% i use up about 8hrs. After my first charge my battery life seems to decline. Oh, and I never play games. I just leave my phone on the table when i'm nt using it, play fb and twitter for half an hour (not continuously) and thats it.
[Galaxy S II General] beppez82:
My usage 3rd day -> 3rd charge cycle:

TOTAL 14h29m on battery

P.S. Juice defender GPS off BT off samsung gesture off autorotation on brightness auto

DISPLAY 42% -> 4h-14m web surfing wifi - hspda (45m) - 10 photo - youtube - hd video - galery - market etc. also used to turn on and off a lot (is only my 3rd day and i love the Samoled+ :P)

P.S. used stock browser cos eat less power (power tutor) dolphin HD make my phone hot and darin fast battery in these 4h-14 got a 20m with dolphin that eat 20% battery, when stock browser make 1h on wifi with less than 20% battery.

ANDROID 19%

SYSTEM 13%

How it is in ur opinion? Tomorrow i will test without JD (full autosync and data on) and after that allways without JD with root and the sams app freezed.
[Galaxy S II General] jonrwg:
Did you enable USB debugging?

I enable it and it seems by doing that my battery drain out faster. not sure what cause it but I guess that is the problem. I uncheck it and see how it goes. Most of you get at least 10hr with mine max 8hr.
[Galaxy S II General] Flash_Gordon:
I was going to ask the very same thing....loved the HTC interface....:D
[Galaxy S II General] jeanclaudevandamme:
i need to charge mine every 24 hours..
[Galaxy S II General] AndyCr15:
I wish people would stop panicking after just a couple of days. It can take up to 10 days to run the battery in people.
[Galaxy S II General] JJEgan:
Plus if you have flashed the firmware you may find battery drain more than it was . That settles down usually within a couple of weeks .

Suggest after a flash a full battery drain and recharge 100%.

jje
[Galaxy S II General] simonk83:
3rd day today. 6 hours usage (screen mostly off), brightness set at 0, stock Samsung apps frozen, BT off, GPS off. I'm sitting at 6% now :( Not good.
[Galaxy S II General] royadams91:
similar numbers i saw on my Atrix.. i would get around 18 average on that so I do see that 1930mAh - 1650mAh difference

I use my phones as music players (and I do that quite a bit throughout the day), I snap a few pictures, bluetooth transfer, scattered phone calls, I browse the web a lot and the occasional YouTube video when I'm bored. I'm also a heavy texter.

Pleased with what I'm seeing so far
[Galaxy S II General] dk206:
What is the P icon uou have?

Swyped from my GT-I9100 using XDA App
[Galaxy S II General] dk206:
You had wifi on and using it for 50mins? Obviously????

Swyped from my GT-I9100 using XDA App
[Galaxy S II General] simonk83:
The P is Power Tutor, not really sure how to set it up though.
[Galaxy S II General] Beards:
Simon,

What differences do you have when not running Power Tutor.

Although it appears to provide a lot of data I did find it used the processor quite a lot.

Also, have you carried out a reboot recently or does it happen all the time no matter how many times you reboot?
[Galaxy S II General] dk206:
guys for a decent battery life don't use a 3rd party task manager. Android is a good task managing OS itself. Killing apps every so often does more damage than good. I shouldn't be saying this. This is common knowledge or should be...
[Galaxy S II General] simonk83:
Hi mate,

Battery is dead now and I'm going to wait until I go to bed (couple of hours) then let it charge overnight. I'll disable Power Tutor tomorrow, and I've pretty much disabled EVERYTHING (all widgets, Twitter, etc etc) aside from Gmail using the built in app. I'll see how long it lasts tomorrow, then I'll start to re-enable stuff bit by bit.
[Galaxy S II General] landerson07:
Well I've had the phone for 5 days now and I think my battery life is about where I want it to be now:

16h 55m 54s

Display 31%

Android OS 18%

maps 11%

voice cals 11%

android system 10%

dialer 7%

cell stanby 6%

phone idle 4%

market 2%

battery level 35%

I've sent and received loads of texts, downloaded 3 things from the market, used tapatalk, applanet, messed on for an hour with servicemode to fix mic issues, listened to 1 hour of music, used an alarm to wake up this morning.

Things i've done on the phone:

froze all hubs after rooting using method in the other thread

installed juice defender ultimate (this improved it approx 1.73x according to app - I've noticed the difference)

used brightness level to set screen at 15%

I don't sync google calendar or whatsapp but sync mail with gmail

I use flow for fb and have turned all notifications off

I have lookout running all the time

anyway, I hope this helps some people. I haven't tried to preserve battery life at all and have used my phone regularly as and when I want it.

Lee
[Galaxy S II General] simonk83:
Hi mate, can you tell me what profile you have it set to (just balanced, or have you set stuff up manually?)

Do you have to sync Whatsapp? I mean, will you still receive messages instantly if you're not syncing it?

Thanks :)
[Galaxy S II General] landerson07:
I think whatspp just syncs your contacts. I don't use it that much but i'm pretty sure mesages still come through.

I've set juice defender to custom but all I've changed are to enable location option, changed schedule for sync to 30 mins and kept the night setting as it was. So pretty much as balanced was
[Galaxy S II General] vimto25:
how long was your screen on for?

you have to root to use this program? :/
[Galaxy S II General] landerson07:
Doh, yeah I know just though i'd help people who maye be didn't ;)

Hard to say how long my screen was on but I used my phone quite a lot for tapatalk, browsing, general messing, texting etc. A lot more than I would have done on my iphone 3g and that would have defo died.

I honestly think that juice defender really helps
[Galaxy S II General] vimto25:
hard to say? just click on the display tab when looking in battery usage and it will tell u
[Galaxy S II General] landerson07:
Learn summit new everyday lol!! This is my first android phone so its all very new and exciting to me :D

But screen time on is 3h 4m 34s. Not as much as I thought it would be, bit as said I haven't been holding back when I want to use it. I don't watch videos etc on it, but might try it soon just to see how it holds up??

Thanks for pointing me in the right direction mate :)
[Galaxy S II General] vimto25:
ha yeh u can click on them all and the graph at the top,

i see a lot of people say i get this and i get that but it goes on how long the screen is on for aswell as the tasks they used.

I must be stuck to my phone lol i get around 12 hours on 6 hours use lol maybe it isnt so bad after all haha,

although useing the 3g and h seems to drain my phone so im starting to try wi-fi (with disable when screen off).
[Galaxy S II General] landerson07:
Yeah I use wifi at home and 3g etc out of the house and also have it set to turn off when the phone is locked.

I'm happy if I can use my phone all day at work without having to worry its going to run out; I'm used to charging every night.

My 3g ran down really quickly if I used it too much and this new phone is faster, better and I use it way more and is still lasting me roughly 2 days of use without being careful??

Winner in my books
[Galaxy S II General] vimto25:
yeh im starting to feel its not bad at all compared to many devices even having such fantastic hardware.

Still would like to root and remove a few things like hubs to see the difference.

But so far so good, I tend to play games at night with the mrs ( 2 player ) as she has galaxy ace and games seem to drain very quickly indeed lol.
[Galaxy S II General] NIK516:
Everyone using touch wiz or a launcher? Because this may affect battery performance.
[Galaxy S II General] vimto25:
useing touchwiz, not useing any widgets tho, i just use a clock and weather widget from market.
[Galaxy S II General] jonrwg:
I'm always in the house, rarely get out off my house for this 2 weeks to prepare for my final exam. So yea, I on my wifi 24/7. :cool:

Before this I had USB debugging on and my battery going down fast so I try to turn it off to see whether it affecting my battery life. So far 15hr now at 28%. Need to have another test again with full charge. Anyway, i'm using TW.
[Galaxy S II General] landerson07:
same here

Lee
[Galaxy S II General] StickyGeko:
Mines getting worse.!!! Day 1 20hrs. Day 2 12hrs.... Today 6hrs and at just over 10%
[Galaxy S II General] StickyGeko:
A bit to add is that my sgs2 signal goes up n down faster than a prozies knickers... Gprs/3g/H maybe this may be impacting battery
[Galaxy S II General] olyloh6696:
Takes aloooooooooooooong time to charge.... bet this is due to the big capacity battery..
[Galaxy S II General] Beards:
Agreed..... I am looking forward to when I have completed my 10 complete charges (100% to 0%) and the battery is then bedded in.

From then on I will be charging the battery at around 60% to 70% which in turn will lessen the charge complete time considerably.

Once a month I will then let the battery run right down to 0% to keep the battery in top form.
[Galaxy S II General] pet family:
How long did it take for you guys to charge from around 0% to 100%?

Mine around 3hrs I think. Same?

It is long compare to my Milestone which only take around 1-1.5hrs but then depleted to 0% in 4-5hrs lol
[Galaxy S II General] hello1122:
Apologies for my funny English.

I have been using my SGS2 for a few days now and the performance of the battery was relatively moderate. Something funny happen today, the battery was dropping quickly with no applications actively running. I used the “Clear Memory button” a couple times to kill them but still the phone lost approximately 30% of battery during 4 hours on standby. Even the battery temperature went up extra 7 degree on the mean time with no wifi, 3g, active sync or any hub applications turned on at all.

Power tutor and battery monitoring widget showed that majority of the battery was used by the kernel or the Android system. I guess the phone may have a free soul and act on its own will. Eventually I decided to turn the phone off and restart. That seems to calm the phone down. The battery is now back on room temperature when standby and power consumption has decreased a lot.
[Galaxy S II General] simonk83:
So are you saying I shouldn't be closing down apps I'm no longer using? I would have thought that'd save battery life...

I just have the "Apps running" widget on one of the screens and close down anything I'm not using any more (especially those that it tells me are using heaps of CPU or whatever).
[Galaxy S II General] pulser_g2:
There should be no need to kill them. It can even use more battery, as next time you load it, it isn't in ram so has to pull it from nand.

This applies to well written apps. If apps hog resources and use cpu when not in use, kill them or ideally replace them with better ones.
[Galaxy S II General] simonk83:
Fair enough, thanks.

As for my battery issues, I think my problem might be this: http://xdaforums.com/showthread.php?t=1039696

Looking at my battery stats, Android OS appears to be accounting for 39%. Surely that's way too much. Just about to read through that whole thread, but for now I've done the "quick fix" and taken out the battery for a minute. I'll see how it goes.

EDIT: Just checked a friends Nexus (running 2.3.4 if that helps) and his Android OS is sitting at 2% :( Mine's back at 40%.
[Galaxy S II General] yellowboy:
I do like the Galaxy S2 but compared to my iphone 4, the battery doesn't last nearly as long and that's with the same type of usage.

I would love to root the device so that I could underclock the CPU but I have a Mac instead of a PC :(
[Galaxy S II General] vimto25:
Bit high mine sitting at 6% after days use
[Galaxy S II General] jonrwg:
Mine sitting at 21% :(

Edit: My display is worst. Constantly at 55% with 0 brightness.
[Galaxy S II General] vimto25:
I think its very close to iphone 4 tbh

Infact it maybe better after some crap is removed that isn't needed.
[Galaxy S II General] balto:
Same thing happened to me today. I rebooted my phone then market told me that battery monitor widget had an upgrade due to high cpu usage in thier free version. I am thinking that was the issue.
[Galaxy S II General] rwc3b:
is about 75% usage on display normal?

battery is lasting about 6 hours on 10 minutes of talk time and moderate internet browsing and facebook, xda app