yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Q&A, Help & Troubleshooting] intruda119:
Im very happy with battery life. Froze a couple of apps and I was good to go.

First phone I've had that didn't need to.be flashed on a daily basis.

I think anyone that's needs more than a day from a single charge needs a blackberry or a home to charge daily.
[Galaxy S II Q&A, Help & Troubleshooting] falconeight:
I have owned a lot of androids and my sgs2 has the best battery life.
[Galaxy S II Q&A, Help & Troubleshooting] THUDUK:
I guess you think it's ok, probably because coming from another android phone, it is.

For me is a pain, every half day have to think about charging, my whole usage of this phone although brilliant, has been taken over by thoughts of how I'm going to next get it charged aposed to what I want to do with my phone.

Something I didn't expect was just how much this phone discharges whilst playing music with the screen off.
[Galaxy S II Q&A, Help & Troubleshooting] EarlZ:
Im not impressed, it just met my expectation coming from an SGS1, but the first one impressed me so ergo Im also impressed on the SGS2 :D
[Galaxy S II Q&A, Help & Troubleshooting] yyhd:
I have had this phone since pretty much near release date. I have been and still am very impressed,by the battery life.

I'm currently on KG1 2.3.4, but since before this past Saturday I was always on 2.3.3 (KE2). Even on 2.3.3 with the AOS bug I was still very happy with battery life.

Now with KG2 out, I'm sure ill be even way more impressed.

I love this phone, and I have been a religous iphone user previously too!
[Galaxy S II Q&A, Help & Troubleshooting] badmania98:
On my phone with 3500mAh battery. With yellow arrows, the behaivour during night.

KG1: during 4 days ( no drain at all)

KG2: during one night
[Galaxy S II Q&A, Help & Troubleshooting] ShaggyDragon:
I must agree, this is my 3rd Android phone (out of a total of 37 phones since 1990) and it's by far the best battery of any smart phone.

My best battery usage is 3 days 13 hours with 25% battery left. That was with wifi on all the time, over an hour of screen time (I was working at home, so no need to play with the phone) and over an hour of phone calls. I'm sure it would have reached 5 days. BTW, I'm running 5 pages of widgets, firefiles wallpaper and GMail is updating all the time.

During the 3 days time I switched off 3G as this is the biggest battery drainer I have seen. I live in a 40 floor tower which is made of thick concrete and the 3G signal in my home office is terrible, the phone is constantly hunting for 3G. When I'm at home, I don't need 3G as I'm using Wifi.
[Galaxy S II Q&A, Help & Troubleshooting] jimhaddon:
I lose around 30% overnight with everything switched off.
[Galaxy S II Q&A, Help & Troubleshooting] ShaggyDragon:
Something seriously wrong with your phone or software then.
[Galaxy S II Q&A, Help & Troubleshooting] maxiboy30:
I'm also very happy with battery life. Using Litening 1.5 (KF2), overnight on airplane mode I lose about 2-4%.
[Galaxy S II Q&A, Help & Troubleshooting] ithehappy:
After using JD Ultimate battery drains about 2-3% in an overnight span of 8-9 hours. Network Enabled.
[Galaxy S II Q&A, Help & Troubleshooting] Testraindrop:
I cant complain, after using JD with sync on every hour I had following results:

http://xdaforums.com/showpost.php?p=15740203&postcount=272
[Galaxy S II Q&A, Help & Troubleshooting] lynxboy:
Love the thread!

I for one have no issues whatsoever with the battery life on the SGS2. If unplugged overnight with WiFi and Sync both on, I lose about 6-7% (8 hours). Never have I found myself not making it through the day, regardless of how heavy my usage was! (Obviously not using it continuously for 10hours....)

Regards.
[Galaxy S II Q&A, Help & Troubleshooting] jimhaddon:
Stock KF3. Highest user of battery overnight = Android System. All widgets removed, network off. Sync off. Wifi off. Even background data is off. still 30% overnight.
[Galaxy S II Q&A, Help & Troubleshooting] Nickkok92:
I also think the battery of the SGS2 is very good. I didn't know what to expect but i think 2 days with a phone battery is good compared to my old telephones which had a hard time getting past 1 day. I am internetting, texting and some other stuff.
[Galaxy S II Q&A, Help & Troubleshooting] huzz:
I am so glad we are finally seeing positive threads about the battery life.

I get about 22 hours +/- at stock processor, HSPDA always on, Sync always on, Tweet deck @ 60 minutes refresh, other push enabled applications, wifi always on when available, which is pretty great considering the processor and the screen. Over all this is the best phone out there and Samsung have made one hell of a device.

Kudos to all the developers though. Some of the ROM's are really good!

Cheers.
[Galaxy S II Q&A, Help & Troubleshooting] GIR:
I have a similar setup (different apps and widgets but with same purpose) and my experience is almost similar. I don't know what some people are doing with their phones but I'm extremely satisfied with the batterylife of my S2.

offtopic:

@bibbified: You don't need to use Seekdroid, the S2 comes with it's own builtin tracking feature. Login to your Samsung account on your phone, activate external controls under Location and security in the settings. If you login to the Samsung Dive site you'll see your phone and will be able to control and track it.
[Galaxy S II Q&A, Help & Troubleshooting] give:
I'm impressed too. Well pleased with the battery life.
[Galaxy S II Q&A, Help & Troubleshooting] Ghazkul:
For those of you who posts graph pictures etc, could you please also post information about the "Display" ? eg if you click on the display under battery usage, you can see how much the display was actually ON, so you have more of a reference and know how much you actually used your phone.

Kinda like this:
[Galaxy S II Q&A, Help & Troubleshooting] twitceh:
I am not so happy with the battery life, the phone only lasts about half a day, from start of work till about 7pm.

Display time today was 3 hours, but AOS was running for nearly 4 hours!

During the night I unplugged it, and it only ran down 3%...

I partially think the culprit is the bad signal and bad wifi signal at work. Anyone have any recommended settings for JD?
[Galaxy S II Q&A, Help & Troubleshooting] Hollow.Droid:
I've been very pleased since the KG1/2 updates. It definitely seems to use less power than previous handsets when being pushed (Flash, games etc).
[Galaxy S II Q&A, Help & Troubleshooting] Unrealbr:
So i did the testing.

When i went to bed i took it out of the charger, set it on Vibrate and turned off WiFi.

Woke up and took those screenshots.

I wouldn't say a 5% drainage overnight is bad.

As some might notice on the screenshots, it's saying twice Android OS (one says Android OS, the other Android System), this is due to a stupid custom FW by my carrier :mad::mad::mad:
[Galaxy S II Q&A, Help & Troubleshooting] Beefheart:
Definitely not mate -- I have been wondering for some time what all the whining is about.

My working day lasts around 18 hours, that is getting up in the morning and taking my phone off charge to going to bed at night and plugging it back in. During that time I'd say I have average use, an hour or so of phone calls, a fair amount of time on wifi and data connection and playing games and watching videos when the mood takes me. My GS2 is normally between 40% and 50% when I put it on charge at night.

I think a lot of people expect to get close to two days. Well, sorry to tell you but you need to wake up. Short of having it in standby and never using it apart from when people call you you're simply not going to get that with a phone like this, it has a dual core CPU FFS.
[Galaxy S II Q&A, Help & Troubleshooting] Ghazkul:
Hm, since my screenshot above with the display ive chated in gtalk for 21 minutes and dropped 7%, that went quickly imho :( brightness was set at 10%.

Before:

After
[Galaxy S II Q&A, Help & Troubleshooting] commodoor:
this month i used two phones (xperia arc and Galaxy 2).

I must say the battery life on the Arc was better then Galaxy2 but they both are better than mine NexusOne.

I think the best way to test the battery life is when you a sleep. You won't do anything with the phone so it doesn't have to use a lot of juice. With the Arc this was superb it only lost 1~2% of battery while the GSII lost almost ~10%. Installed apps and running apps are the same. I have the GSII for a week now, so maybe the battery will get better over time.

I must say on the Arc i almost removed all the junk apps (Sony apps) the GSII is stock no root Running XXKE4. I'm waiting for an update.

Conclusion: Battery life is great, not bad.
[Galaxy S II Q&A, Help & Troubleshooting] Propergood:
This.

I have awful signal at work, depending on where I am in the office I constantly skip between t-mobile and orange, and the area around my desk in particular seems to have intermittent 3g available so the phone's constantly working to find network coverage. Battery drops significantly faster than at home.

I also just swapped out my router at home for a much more reliable one and lo, even better charge retention there.

I'm overall very happy with the battery life myself though.
[Galaxy S II Q&A, Help & Troubleshooting] Beefheart:
I charge my phone every night but in work on Monday I was busy the entire day and didn't get a single chance to use my phone. It sat on my desk all day (around 8 hours) and no one called me which makes a change. When I left work it was on 95% -- so that was 5% loss in around 9 hours of standby. That is brilliant for a phone like this in my view.
[Galaxy S II Q&A, Help & Troubleshooting] Unrealbr:
That's pretty much the amount of sleep i had this night.

And 5% drained :eek:
[Galaxy S II Q&A, Help & Troubleshooting] KaliKot:
The new firmwares handle battery drain better, but the people impressed with the battery life obviously have not owned an iPhone 4 before
[Galaxy S II Q&A, Help & Troubleshooting] Unrealbr:
My father has an iPhone 4 and i was getting him angry today cause i got AutoCAD, he doesn't and my battery is draining only 5% overnight :rolleyes:
[Galaxy S II Q&A, Help & Troubleshooting] huzz:
Try to tether with an iPhone 4 and compare it to the S2 :) . Heck better yet tether an iPhone 4 and compare it to an HTC Desire tethered.

This is a DUAL core processor phone. I am sorry but a comparison which phone has more battery while sleeping is just stupid. That too an "obsolete" tech phone for that matter. Why not just say Nokia 3310 lasts MORE!

heh.
[Galaxy S II Q&A, Help & Troubleshooting] intruda119:
I think everyone knows how good ip4 battery life is. My wife's iphone easily last twice as long even with her streaming slacker all day.

But for a true multitasking, dual core, 4.3 inch screen, super amoled plus, completely open phone I think sgs2 has impressive battery life. I

I figure most iphone casual user have pretty much the same use daily. Since iphone apps are better written/coded they should expect decent battery life.

Android users in general are very diverse users, and probably wouldn't find 2 phones exactly the same. Android problem is fragmentation with apps, games and hardware. Most apps that run the sgs2 hot are not coded for dual cores. I'm guessing at this but most apps are making phones cpu run at max. Which wasn't a big problem for single core phones but makes dual cores run at max for no reason.

I think most sgs2 user with horrible battery life have to find the rogue app that's causing problems. We don't know if all users are getting there apps through legit markets or warez. Not knowing if that warez app is an outdated app not meant for particular phone.

All in all I dont look at the 100 users of sgs2 section and determine if battery life is good. The few times I forget to charge phone overnight I don't worry because my phone could make it through another work day. I'm one of few people who don't use Facebook so that contributes to my battery life but I do use twitter.
[Galaxy S II Q&A, Help & Troubleshooting] jimhaddon:
I think there must be something wrong with the Roms. mine is from O2 and has terrible battery drain. May attempt to flash unbranded Rom.
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
Certainly not the only one happy with battery life.

I have seen a good improvement since flashing to the latest fw on kies (kf3?) can't wait til 2.3.4 because if rumours ring true battery life will be even better!! I think we will be even happier!
[Galaxy S II Q&A, Help & Troubleshooting] sterky:
Hi there,

just registered to share my experience with the batterylife of this phone.

I'm getting about 6,3h of screentime while standby drain seems to be nonexistent, like one percent inabout 8 hours tonight.

Phone was mostly used browsing the web or watching YouTube.

I'm pretty happy with this, as it now comes somewhere close to my iphone in terms of batterylife.
[Galaxy S II Q&A, Help & Troubleshooting] ushare:
Just got mine yesterday. Gonna fully recharge and see tonight. Just upgraded to 2.3.4 XD
[Galaxy S II Q&A, Help & Troubleshooting] :
it seams to me that there are so many bugs in android (even in 2.3.4) which are causing this high battery drain.

started a test tomorrow with battery monitor from 3c.

in standy by the phone used 1mA. after a phone call and writing 1 sms in never goes back to this value. it's now between 34mA and 123mA. no one can tell me that this is normal.

these values i got with 2.3.4 KG2.

so if no one at samsung or google is able to fix these bugs it's time to change the system. i don't need a phone which is eating up the battery while doing nothing.
[Galaxy S II Q&A, Help & Troubleshooting] androidkid311:
Yeeeeeah my battery is good... Well im happy with it. Under heavy useage like ebay app,xda,facebook app,games,calls n text. I get 12/14 hours. :)

Sent from my porn shoot using my GT-I9100.
[Galaxy S II Q&A, Help & Troubleshooting] tjtj4444:
Does battery monitor (3c) supports mA on SGS? I just tested it and it says that mA numbers are only estimated.
[Galaxy S II Q&A, Help & Troubleshooting] :
not sure. there are some settings for the mA retrival. but even if they are estimated. the estimation correlates with the phones battery curve.
[Galaxy S II Q&A, Help & Troubleshooting] Unrealbr:
Only one problem there, i had to set my real battery capacity, it had estimated on 1200mA and after a couple of days i managed to set it properly to 1650mA.

I'm waiting for their next update.
[Galaxy S II Q&A, Help & Troubleshooting] Beefheart:
Or, alternatively, they haven't got their heads up their arses when it comes to realistic expectations regarding their mobile phone. Hardware wise, the iPhone 4 runs an underclocked single-core CPU and has a smaller screen. It's battery life is expected to be superior. Although judging by the battery life my work colleague gets with his, it isn't.
[Galaxy S II Q&A, Help & Troubleshooting] coebergh:
I'm also getting 3-5% overnight. sometimes Android OS is on top of the list on battery usage but when I hit 31 hours of battery live in total, you won't hear me complaining :)
[Galaxy S II Q&A, Help & Troubleshooting] bobbified:
Wow.. I'm happy to see that there are a lot more people out there who are happy with the battery life.

I guess it all does just come down to a person's own expectations.

For me, all I need the phone to do is last at least a whole day at work and through the night when I am out with friends until the early hours of the morning.

With some of my previous phones, I've had to allow a couple of hours towards the end of the work day to charge my phone. And then I'd still have to take it easy on phone-use during the night.

After looking at the high specs of the SGS2, I initially expected a similar situation, but I've been pleasantly surprised! :))

Thanks Gir.. :)

Seekdroid was just a "leftover" app from my HTC Aria days... I'd already purchased it and it came up on "My Apps" in Market.. so I installed it anyway. I did read about Dive and there seems to be some reports on forums that Dive doesnt work in Australia. I'll spend some playing with Dive to see whether that's true or not. Cheers.
[Galaxy S II Q&A, Help & Troubleshooting] Roman5:
Well said. If people are that worried about their batteries, just buy another f****** battery. If people have got so much time to use their phones to the point of draining it every day before the day is out, it makes me wonder how they can afford the phone because they obviously don't have much of a job. I say treat the phone with respect, because that's what it is,.. a phone. No amount of tweaking or flashing mods is going to make ground breaking differences in battery life if people play with their phones all day long like it's an ipod touch.
[Galaxy S II Q&A, Help & Troubleshooting] moevi:
At first was really disappointed with the battery life, it only lasted like 10 hours or so with almost no use at all. Followed all tips on how to improve battery life but nothing seemed to help.

Luckily I finally found out about the battery drain bug which is supposed to be fixed in 2.3.4.

Any word when it's supposed to be released? This being my first android phone and an expensive one at that I'm not sure I feel comfortable flashing a custom ROM and most likely voiding the warranty in the process.

Though I can't understand why it's taking Samsung so long to fix this considering it's a pretty major bug...
[Galaxy S II Q&A, Help & Troubleshooting] tonycfc:
I get the same battery usage now, dropping to around 80% overnight, I hate it. It's the same mysterious 'Android OS' CPU hog which keeps the phone awake. Funny for the first week of my ownership of this phone, it has nevet happened like this before.
[Galaxy S II Q&A, Help & Troubleshooting] JaX3RiR:
I'm also very happy with the battery life of the SGS2. I upgraded from a Sony Ericsson Xperia X10 mini pro, which had a horrible 950 mAh battery which drained really fast. I can now actually use my phone for something (games, apps, internet and whatnot) without having to worry about charging it right after. Besides, it's always possible to buy a high-capacity battery with a larger battery cover.
[Galaxy S II Q&A, Help & Troubleshooting] xeq544:
I am impressed too, and Im still on stock, factory 2.3.3 unrooted. I got the phone two days ago and during this night after full charge to 100 I went to bed and when I woke up after 9 hours 45 minutes I had 99 percent left. (data off, wifi off, gps off)

My best battery life until now was galaxy S1 with Insanity 8.3. I had like 1 percent drop after 5 hours.

Cant wait to try the custom stuff, but I dont think it can get any better.
[Galaxy S II Q&A, Help & Troubleshooting] Poker gypsy:
my old gs1 gets the same my arc stays at 100%
[Galaxy S II Q&A, Help & Troubleshooting] Td8f4:
I overclocked it to 1.5ghz and the battery life is Still great. with an aftermarket battery form ebay it'll probably be even better
[Galaxy S II Q&A, Help & Troubleshooting] RogerPodacter:
You are correct, mA numbers are only estimated on the sgs2. The phone is not capable of outputting mA due to the type of driver and chip samsung used. So they are guessed numbers by battery monitor widget.
[Galaxy S II Q&A, Help & Troubleshooting] Nathalex27:
On villainrom 2.1 using nymphetamine 2.0.1 and realy happy now. Use wifi @home. 3g otherwise. Running whatsapp and msn 24/7.

I only lost 1% overnight.,

Recharged 2 100% yesterday afternoon 17:00u.

Right now ( 8:30u ) i am @ 82%.

I used 30min bt music streaming.

1.5 hours internet. 1 hour chatting on wa or msn.

Normally battery would be down 10 - 20% after one hour.

So sticking 2 this rom for now. :-)
[Galaxy S II Q&A, Help & Troubleshooting] Poker gypsy:
my old gs1
[Galaxy S II Q&A, Help & Troubleshooting] motorsportgod:
my battery is awesome. anyone having dramas should FULLY drain the battery until phone dies completely the charge it via wall for until fully charged {about 3 hours} its seems like a "simple mans" fix but it worked for my wifes phone {sgs1}. no dramas since. my sgs2 has had no dramas since day one.
[Galaxy S II Q&A, Help & Troubleshooting] surfbabe:
My battery is terrible, not even getting full day out of it. Wouldnt say I am a heavy user, dont play games really, just facebook, email and internet. Sometimes phone is left for hours with no use, dont have many apps but its only 17.38 now and phone been on for 11 hours and 26 mins and only have 21% left which wont last for the rest of the evening. The biggest use of the battery is the display which has used 57% today, I dont have a animated screen saver only the beach stock one. Its driving me mad, could I need a replacement battery?
[Galaxy S II Q&A, Help & Troubleshooting] Poker gypsy:
how long have you had your phone? it takes at least 2 weeks of off and on charging! and waite when battery is around 30% shut off phone charge fully turn on phone and charge
[Galaxy S II Q&A, Help & Troubleshooting] surfbabe:
Have had it for a couple of months! Never seen any improvement in battery life right from start.
[Galaxy S II Q&A, Help & Troubleshooting] ajaneesh:
In my experience reducing the screen brightness makes a huge difference. A bright vibrant screen sounds good in the specs and reviews, definitely need to tone down for life in the wild.....

from XDA App on HTC Desire running CyanogenMod-7.1.0-RC1-Desire
[Galaxy S II Q&A, Help & Troubleshooting] kneedraggin101:
my battery sucks, and id like to find out how to improve it...

i took my phone off charge this am at 8:15, did a few txt's answered 3 emails, made 3 phone calls about 2 min each... got in the door at 12:07 and i was at 35%

this is not what the phone is ment to have for battery life... can anyone help improve this? or did i just get a bad battery?
[Galaxy S II Q&A, Help & Troubleshooting] surfbabe:
I have my display set to either auto or about 20%. My battery alert has just flashed up saying I need to connect charger an not even had my tea!
[Galaxy S II Q&A, Help & Troubleshooting] Garendetsu:
Disable fast Domancy. Turn off automatic brightness. Change network mode to GSM. Disable notifications samsung app. Disable WiFi and Bluetooth when not in use. Disable data in the background. Deletes applications and services that do not use frozen with titanium backup.

Which rom are you using?
[Galaxy S II Q&A, Help & Troubleshooting] ajaneesh:
Juice defender has been a good find for me. Really helped me stretch my battery. Even the battery recalibration 'ritual ' helped a bit. Straight out of the box, the battery life was actually quite embarassing!! I also have the autokiller app but i guess the fact that my phone is rooted also makes a difference with both apps....

from XDA App on HTC Desire running CyanogenMod-7.1.0-RC1-Desire
[Galaxy S II Q&A, Help & Troubleshooting] jimhaddon:
OK.. when I first started posting in this thread, I had terrible battery life (around 40% lost overnight on standby).

Now after implementing some changes, I am amazed by the battery life of this phone (only lost 14% after 6 hours of normal-light usage!).

The change that made the most difference was flashing this kernel:

http://xdaforums.com/showthread.php?t=1182498

I'm on stock KF3. After flashing that, Android OS / Android System battery drainage bug was completely gone for me. Very happy with battery life now :D
[Galaxy S II Q&A, Help & Troubleshooting] kneedraggin101:
i have not even rooted my phone... which do you guys suggest, and then ill proceed with a rom
[Galaxy S II Q&A, Help & Troubleshooting] Exidrion:
Cognition Rom 1.20
[Galaxy S II Q&A, Help & Troubleshooting] Riqz:
Kg3 frankenstein with samsung bloatware frozen with titanium.

It's lasting pretty long but why is my android os so high? How do i get rid of it and will my battery improve?
[Galaxy S II Q&A, Help & Troubleshooting] kneedraggin101:
can anyone post the links to the rom, also the best way to root this phone?
[Galaxy S II Q&A, Help & Troubleshooting] ithehappy:
^ CF Root is the easiest and yet most effective way of rooting. Read his thread,

http://xdaforums.com/showthread.php?t=1103399
[Galaxy S II Q&A, Help & Troubleshooting] uncledave649:
I got this phone couple days ago, everything is blazing fast but the battery is not impressive compared to my old bold 9700. I can get about 10 hours with normal usage, any tips to extend the battery life?