yashsingh1/xdaforums huggingface dataset:
[T-Mobile Samsung Galaxy S II SGH-T989] umchriswho:
okay so my brother also has one. we got it on the same day and played for it the same amount. i JUST started comparing the battery life to each other today while we were on our trip to sam's club.

we basically have the same applications except i have llama (because the above post stated that it helped his battery life) and battery indicator. and i have power save mode enabled.

i looked through all our settings and they're basically all the same.

so while we were at sam's club, i told him to turn off the wifi and gps and kill all tasks.

my battery was at 20% (with power save mode) and his was at 40% (power save disabled)

at the end of our hour trip from sam's, i told him to show me his percentage and i cried...

mine dropped from 20 to 9, while his just dropped from 40 to 36. cool story.

i srsly want to slam this beautiful phone just because it's not going my way.

as of now, i'm going to (like someone said in earlier post) to drain my battery and recharge it to see what will happen.

samsung 1, me 0.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Interesting... I wonder if this is battery related or the unit itself. If like to pinpoint it. Also I'd like to know if these power saving apps are causing battery drain instead of helping... I've noticed that leaving my phone alone sitting on the table yields excellent battery life, but as soon as I start to use it I can see the percentage draining.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
I think you mean set the levels into the phone. You don't have to condition Li-ion batteries
[T-Mobile Samsung Galaxy S II SGH-T989] fatannasty:
My info
[T-Mobile Samsung Galaxy S II SGH-T989] techTosh:
heres my screen shot and the battery is pretty good.
[T-Mobile Samsung Galaxy S II SGH-T989] samomamo:
Battery status stock on 100% after full charge?

Hi, does anybody have a problem with the battery status showing 100% after full change?

When I do a full charge it stays on 100% until I reboot then it starts working. Last time it stayed 100% until it drained the whole thing.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Nice work guys. Can somebody that's posting amazing battery life do me a favor? Next time the phone is charged all the way, unplug it and use it for roughly 10 minutes non-stop. Preferably just browsing/replying on XDA. I wanna see how much drain there is and if you end up with something like this:
[T-Mobile Samsung Galaxy S II SGH-T989] AmbroseAI:
There is some discussion of that here:

http://xdaforums.com/showthread.php?t=1301609

Beginning with post #23
[T-Mobile Samsung Galaxy S II SGH-T989] fatannasty:
The opposite happens for me... I let the battery drain completely then recharged last night. Started playing with phone about 8:30pm - 1:am, and battery was at 70% when i went to sleep. I woke up in the morning about 8:30 am and my battery was at 15%....what could be killing the battery?

---------- Post added at 03:30 PM ---------- Previous post was at 03:26 PM ----------

How are you getting great battery life
[T-Mobile Samsung Galaxy S II SGH-T989] Mustoura:
Sent from my GT-I9100
[T-Mobile Samsung Galaxy S II SGH-T989] G1_enthusiast:
coming from a G2 with a 3200mah mugen battery this is gonna suck :(
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Do you have anything running in the background eating up CPU?
[T-Mobile Samsung Galaxy S II SGH-T989] G1_enthusiast:
guys get juice defender it will help... syncing is the issue here...if you get juice defender put it on 15 min for synching and it will help..
[T-Mobile Samsung Galaxy S II SGH-T989] mikeyinid:
mine did this the first charge out of the box. Doesn't do it now.
[T-Mobile Samsung Galaxy S II SGH-T989] wease:
Mine did this once as well.
[T-Mobile Samsung Galaxy S II SGH-T989] fatannasty:
Noting running in the background
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Omg. I pulled off the charger this morning at 7. walked to my car at 7:30a having done nothing, 96%. Went to the gym and returned at 9am while the phone had sat in the car: 82%.

4G on, all other services off. syncing Gmail only.

WTF!!!!!!!!!!!! BAD BATTERY?
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
I'm having somewhat similar results
[T-Mobile Samsung Galaxy S II SGH-T989] G1_enthusiast:
what is your display? on 100%? factor that in too!
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Nope, 40% or lower.
[T-Mobile Samsung Galaxy S II SGH-T989] iunlock:
Hmm that's odd. If you have everything turned down / off and it's draining at that rate...might want to exchange the device for a new one. Whether it's the battery (maybe), software (highly likely) or hardware (highly unlikely)... there's a motto in Hawai'i we say..."If can, CAN."

So if all else fails with no luck just go exchange it for a brand new SGSII. Done deal brotha. ;)
[T-Mobile Samsung Galaxy S II SGH-T989] kdog808:
mine does that to i hate that and when i kill apps in task killer on the ram side it says 19 apps killed wtf is that
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Phone sat in the car, display off for 2 hrs! 18%! This 4G is a killer :mad:
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
You lost 18% or it went all the way down to 18% from 100%? Because if it's the latter then wtf are you doing with it? Charging another phone off of that one? :p
[T-Mobile Samsung Galaxy S II SGH-T989] Mustoura:
One of the biggest battery eater is Google maps,apps,and weather. Try uninstalling any Google apps and maps that you can if you your phone is not rooted and reinstall them check your weather widget isn't set to refresh every 15,30 minutes . I have personally have had this happen to myself. Twice and its been Google stuff after updates. I easily get 24 hrs with moderate to heavy usage on light usage 38 hrs +

Sent from my GT-I9100
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Good idea. My battery usage seems to show that the screen is taking up the most, but I doubt that is what is causing faster drain. I mean, can the screen on one handset use that much more battery than other user's handsets? I mean same amount of time on and everything.
[T-Mobile Samsung Galaxy S II SGH-T989] Mustoura:
The display is nearly always high because it is the one thing that always get used but not a major drainer.

This is also with wifi on

Sent from my GT-I9100
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
No sorry it dropped 18% to 82% in a little over 2 hours. Pretty bad fot beig idle.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
One thing we have to also consider is cell signal. I noticed I have choppy signal during the day and that might be some of the cause. If there's a properly implemented wifi calling feature we might all see battery life increase (those that don't have 100% signal all day).
[T-Mobile Samsung Galaxy S II SGH-T989] :
When we get cm7 the minimal bread theme will be good for battery life. Another way which takes some times to set up is to use gmail. Gmail has push notifications which uses the least battery life. Set labels up for whatever app like facebook or twitter so it wont get mixed up in your inbox and have gmail notify you instead of the app. You can even cut sync off depending on the app. This will save you the most battery life. There are also push notifications only apps very few compared to iphone though.
[T-Mobile Samsung Galaxy S II SGH-T989] kvntrn28:
I am too having the stuck on 100% after fully charging the SGSII. After using it for a bit it still says 100% so I have to turn the phone off and on, and then it show my real percent. Is there any fix to this? because turning the phone off and on after charging it is getting annoying.
[T-Mobile Samsung Galaxy S II SGH-T989] G1_enthusiast:
Juice defender guys it will control your synching
[T-Mobile Samsung Galaxy S II SGH-T989] KLR Rico:
I'm having the same issue... I can watch the voltage drop in "Battery Widget Pro", but the app and system both show 100%, and attempting to charge brings up the charge complete notification. If I reset the phone, the proper battery % will show up and charging will work normally again.
[T-Mobile Samsung Galaxy S II SGH-T989] Malike25:
I'm using juice defender on my gs2 and it works great. Today with moderate usage I'm at 55% on 12h 44m. So if my calculations are correct and my usage doesn't change I should be able to get 24 hrs out of this device.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Using only 4G?
[T-Mobile Samsung Galaxy S II SGH-T989] tipsek:
I'm on juice defender aswell, normal usage I have 43% left and been using for 14h 12min. It should last about 24hrs like previous poster said.
[T-Mobile Samsung Galaxy S II SGH-T989] phreshjoker:
How to get better battery life?

My phone seems to heat up alot and lose battery faster what do you guys have in your settings to have a better battery life?

Sent From my Galaxy S II T-Mobile
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Are you primarily on 4g? What settings are you on for juice defender?
[T-Mobile Samsung Galaxy S II SGH-T989] Malike25:
Juice Defender will automatically shut the 4G radio off when the screen is off and turn it back on once the screen is turned back on. This will save battery life since the phone will not be constantly connected to 4G/3G when not in use. When I turn the screen back on it takes less than 1 second for 4G data to be turned back on and I can start browsing the web or Facebook. I currently have Juice Defender Ultimate and I'm using the preloaded profile 'Agressive'. I was able to get 16h 30min out of my handset yesterday and still had 30% battery life left.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
When your screen is off and 4g is toggled off by juice defender, are you on edge then? Are you still able to receive emails and texts? A
[T-Mobile Samsung Galaxy S II SGH-T989] Malike25:
I'm not 100% sure it drops to Edge and I haven't seen the edge icon show up next to the signal strength. I still receive text and email notifications when 4G is turned off. When someone sends a MMS the phone will not automatically download the pic. You will have to click on download in order to receive it. The nice thing w/this phone is the pic will download in 1-2 seconds thanks to the data speeds.
[T-Mobile Samsung Galaxy S II SGH-T989] grabiarz:
Nope no edge, when JuiceDefender shuts off your data, it is completely off. You can set it to enable the connection every X minutes so that the phone connects and pulls emails and what not.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Thanks. I tried and texts do come in though.
[T-Mobile Samsung Galaxy S II SGH-T989] fatannasty:
I had almost the same problem.... I returned the phone and got a new one problem solved
[T-Mobile Samsung Galaxy S II SGH-T989] Flash23:
Hey guys, how exactly does llama work? I did what was told in the OP... But how I get it work?
[T-Mobile Samsung Galaxy S II SGH-T989] ixJay:
What do you guys have your Juice Defender settings on, and about Llama. Do you enable the events made "wifi connected, wifi disconnected" or how does this app work? Also, the app comes with made events.. do you delete those or unable them? Thanks.
[T-Mobile Samsung Galaxy S II SGH-T989] G1_enthusiast:
i have mine set on advance setting, 1 hrs syncing for 2 min, honestly guys if you go into Facebook it check for update and your email doesn't come every minute, if it does you can change it to sync every 15 min. i will start using it tomorrow using juice defender will check back and see how it goes.
[T-Mobile Samsung Galaxy S II SGH-T989] ixJay:
How do you change the syncing on gmail app? I have my facebook refresh interval on Never.. Since ill just refresh it manually when i use the app :D

EDIT: When i use Task Manager, and go to the "RAM" Tab, and Click "Clear Memory", it closes applications.. and i can click that button every 2 mins without ever using any other apps, and it still closes apps.. is there any app that can kill these background running apps at all times for me, instead of me having to click a button every time?
[T-Mobile Samsung Galaxy S II SGH-T989] mastaglaus:
I'm at 36% after moderate use.

Not too bad.
[T-Mobile Samsung Galaxy S II SGH-T989] gamefreakgcb:
In the battery calibration, what should I put for:

Total:______mAh

Max:_______mV

Min:________mV
[T-Mobile Samsung Galaxy S II SGH-T989] kabuk1:
I did have it on the car charger for about 10 mins on my way to my mom's tonight, but after streaming audio most of the day, lotsa phone calls & texting, about 20 pics w/flash, quite a bit of web surfing, and the screen at almost 50% brightness, I'm only at 36%. I freaking love this phone xD
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
How...is...that...even...possible.

I drop 1% per 10 minutes. No refreshing widgets, sycning only mail on 4G.
[T-Mobile Samsung Galaxy S II SGH-T989] ilimit:
[Q] Battery Life on GSII shows 100% even though it's depleting

Hey guys, I noticed that after a full charge overnight, the battery life stays at 100% forever.

This happens even though in reality, the battery life is depleting. I would need a reboot to show the correct percentage.

I tried to uninstall battery indicator but that didnt work. I shouldve known something was up when its was going on 17hrs w/ 100% left.:confused:

Is this happening for anybody else? Thanks.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
I'd like to say with JuiceDefender running I've managed to up my battery life substantially. I'm not sure if this is something that needs to be massaged out over time (charging/discharging) the phone or not. I've also noticed that for some reason when using a car charger it doesn't seem to last as long (logic tells me that it's just my own perception and not what's actually happening though). Here's mine yesterday (you can see I plugged it in to the car charger for a short period, look at the tiny spike in power):

For anyone that's having issues such as the poster above, grab a screenshot of this page at the end of your day (or whenever the battery is dying) and post it up. To take a screen shot go to the page and then tap the home+lock buttons at the same time momentarily.
[T-Mobile Samsung Galaxy S II SGH-T989] samomamo:
My first gs2 was same then I exchange it yesterday and its still the same, I think its from the charger.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Going on 17hrs with power is impressive. From what I've read it seems the issue should go away with time but don't quote me on that as it's 6:55 am here :eek: Still, besides the point, you're running 17 hours and the phone isn't dead, I personally wouldn't exchange that for anything :D
[T-Mobile Samsung Galaxy S II SGH-T989] ilimit:
I wish. By the time I did a restart, the battery percentage read 3%. I don't know if I should try an exchange? Thanks for the quick responses!
[T-Mobile Samsung Galaxy S II SGH-T989] mikeyinid:
This seems to be pretty common with the first charge or 2 out of box. Mine did it the first time and hasnt done it since. Id ride it out a day or 2 and see what happens.
[T-Mobile Samsung Galaxy S II SGH-T989] ToastMan12:
Yup, same here.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Is there any truth to Androids "calibrating/conditioning batteries" on new handsets and then settling into good battery over a few days?

I've downloaded Juice Defender and I think I understand its function. It disables internet radios but allows phone calls and texts to come through still (GPRS). On airplane mode, I was able to get nearly 3 hours before a single percent dropped (idle, low brightness), likewise not utilizing any 4G/EDGE radio will significantly prevent severe battery draining. While Juice Defender does help out the SGS2 immensely, let me ask you guys this - isn't this disappointing considering the appeal of the device was the rocket fast 42mbps radio but we should feel guilty using it? How would brand new Android owners know how to react to the drain?
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
this is confirmed a known issue, please report the bug directly to samsung

there is a sticky link in the forum
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
I haven't felt guilty at all. It shuts it off during screen off and turns it back on when you're using the phone. I guess I don't see what you mean. Yes, I am slightly dissapointed with the non-juicedefender battery life at least on my unit. All in all, with juicedefender when I unlock my phone I have no noticeable loss in speed.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
I mean do you feel disappointed that you need this caveat app in order to use the phone you intended to use? Ideally we'd all want 4g on all day, getting email and fb notifications and knock out 14-16 hours a day with heavy use.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
If you go to customized mode, you can set it to ping every x number of minutes. I have mine set to 15minutes where it re-enables data long enough for everything to update all while the screen is off. I see this as a plus, keeps data useage down and keeps battery alive longer. In a perfect world, yes, I'd like to have no need for juicedefender. I'd love to be able to just play games/surf/text/voice call all day for 14 hours (if I really wanted to) but I'm not sure that you can do that with this phone or any phone on the market today. I'm coming from an HD2 which had maybe half this battery life so I guess I'm pretty impressed, although I do see where you're coming from now.
[T-Mobile Samsung Galaxy S II SGH-T989] ingenious247:
Yesterday I got 16 hours out of my phone before it died.

I do not use Juice Defender or any app like that. I do turn off Wifi when I leave home, and turn it back on when I get home from work... but I'm a fairly heavy user, I'm constantly reading my RSS feeds, checking XDA, Facebook, texting, surfing the web, even play a game or two pretty much every day.

Coming from the MT4G which I had totally optimized, this battery lasts about 40-60% longer. I would get 10 hours out of my MT4G (like I said, I'm a heavy user) but I get 14-16 from this phone. So I don't get where the complaints about battery life are coming from..
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
I maybe should have prefaced that this is my first Android coming from a blackberry with 36-48 hours per charge but those phones didn't require much to begin with. My expectations from this pedestal phone may have been unreasonably high therefore my feelings were expressed above.
[T-Mobile Samsung Galaxy S II SGH-T989] ingenious247:
ahh that makes complete sense.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
See, I don't think I can pull 16 hours with that much use. Could it just be cell signal? What's your signal like where you use your phone? I'm starting to think my display might drain more battery. I've been using this thing for 10 minutes reading the new posts and typing this and my battery has gone down 5%. Seems a little high to me. What is everyone else getting? I should mention I have about two bars of signal.
[T-Mobile Samsung Galaxy S II SGH-T989] Darmokk:
Battery Problem: Stays charged at 100%

I know a few people have already reported this bug in the "Issues" sticky and "Report problems to Samsung" thread, but I figured we could have one central thread about it until a solution is found.

The problem happened again to me this morning: After charging the phone up to 100% while I slept overnight, It showed 100% Full charge even after using the LED flashlight app for a few minutes. So I powered down and restarted the device. After that it read correctly at ~97% charged, but it looks like at this point unfortunately I'll need to power down and restart every morning after it gets a full charge.

Not the end of the world, but an inconvenience for sure.

Some other members in the other threads said this problem went away after a few days/cycles. I have had the phone for about 6 days and this is the third time it's done this (basically everytime I charge to 100%).

Anyone else having better luck?
[T-Mobile Samsung Galaxy S II SGH-T989] ralnee:
Swapped out battery.. Hoping for the best!!!

I picked up mine this past Thursday, and truly loved this phone until the battery died on me showing 100% charge on Sunday. I assumed it was a conditioning issue, until it happened a second time. I went to T-Mobile and exchanged the battery. Now it been two days and no issues, yet....

I'm keeping my fingers crossed.....:confused:

P.S. I upgraded from a Vibrant to this beast and besides the battery issue, I'll never look back. The Vibrant was nice, but this phone is a monster. :cool:
[T-Mobile Samsung Galaxy S II SGH-T989] Darmokk:
Interesting, please do report back your results with the new battery going forward. Perhaps the issue is simply a bad batch of batteries? Regardless, I'll be going by T-mobile tomorrow for them to swap out my battery for a new one :cool:
[T-Mobile Samsung Galaxy S II SGH-T989] gamefreakgcb:
Screen brightness on low all-day (I actually like it that way), wifi as you can see, BT was on when I was driving, texting, a few emails, about an hours worth of phone calls, reading my favorite fanfics in Opera mini. No battery saving apps yet. Can't wait to root this.

Coming from a Nexus S and this thing is a monster. I'm going to do a few days like this to figure out how many hours I can eventually expect.
[T-Mobile Samsung Galaxy S II SGH-T989] ixJay:
[Q] Battery is no good?

Hello xda forums, Good morning. Well, i woke up seeing my battery level at 50% and was highly upset and wondering why this is. Let me show you guys my last ~14 hours of use with this phone.

1) Phone got to ~15% at 8pm. So i put it on the charger(PC USB). It charged from 8pm-5am(To get 100%). Yes i was using it for texting(heavily) and about 30 mins worth of a phone call.

2)From 5am-11:45am it has been off the charger, only used it for about 40mins for texting(not heavily, from 5-5:45) after that i was sleeping till 11:45. Went to check battery percentage left, and i was at 50%.

3)Only apps i got running constantly are, NoLED, Juice Defender, Llama, Advanced Task Killer Free.. 3 out of the 4 apps help prevent battery from draining. I understand NoLED couldve used some battery, but not 50% of it.

So what do you guys think the problem can be here? I dont see how i can go to sleep with my phone at about 95+% battery and wake up almost 6 hours later and its at 50%, and me not even touching it. Another thing is, within the last 20 minutes my battery dropped 5 percent. (hardly any use). Can my battery just be bad? or these apps i have up are draining it? Let me know. Thanks:confused:
[T-Mobile Samsung Galaxy S II SGH-T989] jr8801:
i do not have similar battery drain issues. might be your battery. Although i did exchange my phone because i would charge my battery full and then use all day without any battery drop at all. said 100% all day. then my phone just turned off lol. i have a screen shot to prove it. might want to go exchange if you are still in your time limit, which you should be.
[T-Mobile Samsung Galaxy S II SGH-T989] Jjday7:
I just started using Juice Defender a couple days ago and I can tell you that just by it turning off the radios when the screen is off, my battery lasts the whole day. The 4g radio is the killer and rogue T-mobile bloat apps are chewing data in the background. I looked at my billing and noticed that in the middle of the night there are apps that are using 30-50mb of my data. Once I switched to Juice Defender, all that stopped. My phone truly sleeps now.
[T-Mobile Samsung Galaxy S II SGH-T989] :
Biggest problem why are you using advanced task killer when you have a task manager installed. Android is not meant to kill apps unless that app has a memory leak. Every time you make advanced task killer kill an app you make it reload the application. Thus your using more of the processor power. Watch this and explains why task killers are bad. A task manager is fine. This video will explain it. http://www.youtube.com/watch?v=lsz4aY4d33Y
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Here's a question: Has anyone exchanged their phone and found the new one to have substantially better battery life (or worse)? I think that would solve a lot of problems for me.