How long should my Samsung Galaxy S II’s battery last?

Currently finding my Samsung Galaxy S II lasts about 12 hours on a full charge. Not playing games much, Wifi is off, no apps running in the background… just texting, and sometimes on Facebook. Is that normal?

Most Useful Answer shuwaz  Jun. 21, 2011 at 13:02

Yep its the age-old dilemma.
Apart from keeping two phones you are just stuck waiting to see if you can get a phone like the Nokia E71 with a touchscreen Android OS. :(

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JanSt / MOD  May. 31, 2011 at 17:53

My Galaxy S 1 and Htc Desire HD lasted about 6-8 hours - no wifi/bluetooth/gps, screen on 25%. I do use opera mini a lot, and 2 email accounts were updating every 30 minutes.
Currently I mainly use a Nokia C7, 3.5'' AMOLED ON FULL BLAST, 3 email accounts on 'push', Gravity for Twitter always on, and skype IM in background 8 hrs/ day. The C7 goes for about 24-30 hours. Similar usage on my Palm Pre 2 gives me about 14 hours. But there is no Opera Mini for webOS, so the Pre's browser uses more juice, than om on the C7.
My Nokia E61 and E71 did everything our modern phones do and lasted about 4 days for my demands. (though, no touchscreen obviously)

shuwaz  Jun. 21, 2011 at 13:02

Yep its the age-old dilemma.
Apart from keeping two phones you are just stuck waiting to see if you can get a phone like the Nokia E71 with a touchscreen Android OS. :(

cgeer12  Nov. 21, 2011 at 20:27

Hi, if you want to extend the battery life on your sgs2 goto Darky rom and flash darky rom 2, your battery will last a whole day with fairly heavy use and having wi fi on all day. This does root your phone as well which opens up a wealth of options.

mugglesquop  Nov. 22, 2011 at 15:52

my iPhone 4 lasts 2-3 days, Wifi and bluetooth on, email all day, few texts, few calls, few games, music while travelling to work and back.

AcoyaSGS2  Nov. 22, 2011 at 16:02

My SGS2 had the same problem. I found that deactivating data increased the battery life to days.

We i say data i mean the 3g connection not just wifi.

Hope it works for you

cartedorlondon123  Dec. 29, 2011 at 18:55

I went and bought an bigger and thicker battery and it comes with a new backing cover.

i switched off all the stuff that uses battery
3G off
wi-fi off
auto rotate screen off
animation off
background data off
brightness set to the lowest

only switch them on when i need them.

wifi can be on at all time as people recommended, but if you have whatsapp installed, this little app sucks so much juice in the background.

I found my big battery last 5 days now, with still 26% going, which is not bad.

once this 26% is all gone i will have a look to see how long the normal battery lasts.

equ  Jan. 2, 2012 at 20:55

I was getting terrible (6~7 hours) from my SGS2, turned out to be TinyTowers running in the background. I guess as it was a IOS app origanaly it does not auto sleep in background and was thrashing my CPU at 50% all the time (I guess its also not duel core enabled either...)

Now getting about 30 hours with resonable use and some TinyTowers closed on exit (Plese help me!!!).

shuwaz  Jan. 3, 2012 at 21:22

mine seemed to pretty much double its up-time since i installed juice defender.

LANRE  May. 4, 2012 at 07:35

thats the beauty of samsung over iphone. u can have two batteries and change it when one runs out. i have an external chrager to charge the second battery without putting it in my SG2 phone. i need extra hours of juice cos i use my phone for wifi and games and movies all day

JanSt / MOD  May. 4, 2012 at 09:20

Lanre, I didn't know Samsung invented the removable batter? :p

dogface  May. 4, 2012 at 09:42

Well can only comment for debranded stock ICS here but with some talk time/texting, lots of draw something it was still on 40% after 48hours. This is a brand new phone btw, few weeks old. Data was on, wifi off, gps off.

matt101101 / MOD  May. 4, 2012 at 16:28

Lanre, I didn't know Samsung invented the removable batter? :p
What do you know? ;)

matt101101 / MOD  May. 4, 2012 at 16:33

I'm going to give the other side of the story.

My S2 is currently running a CM9 Nightly ROM (the exact version changes almost daily), with the Siyah Kernel and is OC'd to 1.6ghz on the CPU and 400mhz on the GPU with the screen on full brightness, using the standard Samsung 1650mah battery which comes with the phone.

Average life span, 6-8 hours with what I count as normal use (the rest of the world would count it as heavy use). ~4 hours with stupidly OTT use.

Pondlife  May. 4, 2012 at 16:45

This is one area I'd hope that the s3 improves on. Do you use a 2nd battery then or just have to accept it'll switch off at some point?

matt101101 / MOD  May. 4, 2012 at 16:48

I have a charger at home (the official SGS2 one), a charger in the car (and one in my missus' car), and a charger at work (my old HTC Desire one). MicroUSB is a godsend :p.

I prioritise performance over battery. If I wanted crappy performance and a long battery life, I could have bought a phone that cost half as much.

bong  Jun. 24, 2012 at 17:25

1. Is it ok using bigger capacity battery like 3600 mAH?

2. Is it ok using aftermarket battery?

3. Is it ok changing the battery often if I have 2 battery?

THank you

matt101101 / MOD  Jun. 24, 2012 at 20:15

1) Maybe, depends on the brand

2) See answer to no.1

3) Yes


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