yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Ok again WOW see below. Didn't get another freak out like before so will see worked fine all they way thru. It would of been more but I forgot to wipe cache/dalvik when flashed kernel so I did it today anyway Im impressed! !!!!! Thanks guys will see Tuesday how it holds up on train/work.

I would say it was 1 day 9 hours!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
What's the battery calibration app you're referring to yozh?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
https://market.android.com/details?...yLDEsImNvbS5uZW1hLmJhdHRlcnljYWxpYnJhdGlvbiJd
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
Thanks, will give this a go.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] sk8erwitskil:
still 30% left
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
Tried the battery calibration app - at first charged to 100, ran it and then disconnected. Found no results, tried the same sequence of steps yozh listed above

Unfortunately did not find the same level of improvement as yozh did. Usage seems more or less the same, the fact that I'm not running a custom ROM might explain the difference.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] sk8erwitskil:
calibrating the battery wont make you have "improvements" to battery usage. it just makes the OS more accurately display the battery level
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] ckang008:
it's ridiculous how much power this phone consumes. I see this is a major problem with samsung phones as of lately. It's not even about the screen anymore because lots of ppl still see a huge dip in power even though they have the phone idling on the side.

End up having to go to amazon and buy a battery to compensate

---------- Post added at 08:32 AM ---------- Previous post was at 08:31 AM ----------

here's what i got in case anyone else have battery issues and need a battery that can last a day

http://www.amazon.com/QCell-Samsung...3K/ref=sr_1_10?ie=UTF8&qid=1329809509&sr=8-10
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] sk8erwitskil:
+1 thats the exact one i have and i LOVE it. i only have to charge my phone every other night. its amazing
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
Yes, an engineer at Google said it doesn't make a difference. yozh's results were interesting though which is why I gave it a go.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Absolutely correct, the calibration did not make it better, it just reported the results more properly, for instance when I flashed DA_G kernel somehow the battery was stuck at 7% for 2 hours and actually switched from 6% back to 7% 2 times as I showed in 1 of the pics....

What did make a huge difference in my opinion is the Kernel and UV it, I saw the difference almost right away, maybe 1 day after. Not sure it was a combination of the SkyICS ROM and this kernel, I like to think it was, since its too much hassle to go back to my backup stock ROM now, but it works, the battery is great now! JuiceDefender Ultimate also helps a lot !

Now with that there is a disclaimer, in LTE area the drainage is significantly higher ! triple if not quadruple the 4G/3G and WIFI.

I`m still testing at work today, but after watching a movie on a train lots of Emails and some other stuff, after 7:30am unplug I`m at 71%, currently in LTE area/
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
I'm keen on trying that kernel and seeing if/how it improves things. TPC looked like a good fit but is there another that is the go to now? I take it your vote is for Sky ICS?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
I say try TPC. See if you. Like it.

Today couldn't go 13 hours, somehow got home 17% and 1 hour later was dead
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
Saw mention of BetterBatteryStats in another thread and giving it a go - seems to have some interesting diagnostic information and instructions on how to optimize.

http://asksven.github.com/BetterBatteryStats-Knowledge-Base/howto.html

Note the developer is an XDA member and has evidently made the app free for XDA'ers, although I opted to pay for it.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Shadeslayers:
This is what I usually get. Right now it's been off the charger for six hours and am at eighty five percent.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Lakland:
How you get this results? Are you rooted? do you use your phone?

This is ti good to be true :D
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
That's not bad considering your reception is not so great. Are you on a custom rom?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Shadeslayers:
Yea. Nexus mod and faux kernel. I have spotty reception because the buildings that my classes are in don't get service, so I actually just switch to airplane mode.

It's Great habit to switch to airplane mode when you're not planning on using your phone. Right now I'm at seventeen hours and sixty six percent...haha.

EDIT: also I text a lot, which is why my phone is so intermittently awake. The voice calls really burn through the battery though.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] WolfpackFan1970:
12 Hours Battery Time

I picked up a Galaxy sII Skyrocket from AT&T and have to say I really like it.

Rooted and removed bloat wear first.

I haven't flashed a custom rom yet.

Want to get a good feel for the phone prior to doing so.

(Have a Galaxy S Captivate with IceCream Sandwich - too slow and overheats)

Using the stock power management & rom management widgets seem to be doing a good job in controlling battery power.

I have it set to cut off wifi, etc. when it goes to sleep, no live wallpapers, widgets only for Calendar, Weather & Google Voice.

I ordered an extended battery from Amazon today after reading ckang008's post here: http://xdaforums.com/showthread.php?p=22777866#post22777866

Hopefully that will give me enough power to travel over a 24hour period and still keep going.

(UPDATE - 5/6/2012)

I love the battery I picked up on Amazon. I get a full 11 hours of heavy use now. Two gmail accounts sync, skype, games, music via Spotify, etc.

Highly recommend an upgraded battery. I no longer worry about battery life.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Shadeslayers:
That will be more than enough. Especially with the extended battery, you could easily go two full days. As long as you don't spend a lot of time on voice calls.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] smartnphone:
In my case, battery is very important to me.

Mine is rooted with custom rom Sky ICS. I use setcpu to underclock( performance is fine and the huge battery boost is worth it. I have blackgoog search homepage to save more power(black colors don't use battery for amoled screens) and no wallpaper(black wallpaper). I also use juicedefender to save power. I'm a heavy user and a 4.5' screen dual core phone like this lasts more than a day for me.

Try these tips ^ for those who need battery to last all day.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] t3chfr3ak07:
Stock batter Bonus

If you guys aren't aware the extended batteries that you buy off of amazon or ebay DON'T have the NFC chip built in. If you install a rom that has apps that can use your NFC chip you will need your stock battery cause its inside the battery. After rooting and de-bloating my Skyrocket i was able to get between 14-30 hours depending on use. I have loved my battery life on this phone compared to my Sidekick and the Vibrant before that which lasted about 12 hours each. Im currently running a couple of different roms which are optimized to extend battery and i have consistently gotten 24+ hours on each charge. Just a thought!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] epexegenesis:
SGH-I727R had terrible battery at first. was like this:

10h 58m 7s on battery

13% remaining

28% display (52m 51s)

18% android system

18% voice calls (18m 31s)

12% maps

8% cell standby

8% android OS

5% phone idle

...

I took it back to the store and they basically told me to **** off and go straight to Samsung for any battery problems.

Turns out I get MUCH better battery life by charging straight into the wall through the included charger. Charging by a computer USB port seemed to be causing the problem. Doesn't make much sense to me, but it's the one thing I changed and it made an enormous difference. I can now get 6 hours of display on time (Use ScreenFilter!), which I think is reasonable.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] psymont:
I am now on my third skyrocket. the first one i bought had a blown earpiece so everything sounded buzzy. i returned it for a new one, rooted it, charged it on a generic wall charger and ran battery doctor to calibrate. the next day the battery stayed at 100% all day and then the phone just shut off around 10 hours after unplugging it. i was not able to turn it back on. it would show the two samsung logos and then just die even though when plugged in the battery showed it had power. i took it to the store and tried one of their batteries just in case it was a faulty battery but it still would power on. So, I got the third one. i tried to get att to let me take another phone instead but they said if i changed the phone type, they would charge me a restocking fee. i explained that i was nervous about getting a third skyrocket and having an issue on lets say the 31st day after purchase. they convinced me to give it another go. anyway, i have had the third one for two days now and have rooted as well as charged on generic charges with no issues so far. maybe battery doctor is what screwed my second one up.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] musa13:
First week my battery would last 10-12 hours, but after first week battery last up to 24 hours. I did turn-off LTE because coverage in Tampa Bay area is so good. Using CPU Master to lower frequencies when screen is off helps a lot.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] agafed:
I use mainly Wi-Fi connection, and if I use it a lot, I get about 24 hrs of use... which is about 2 days, 12 hours per day. If not, I get 3 days tops...

I'm gonna try a Custom Rom from here, to see if I can get better battery life.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] juude90:
Just another Wednesday. Been texting/browsing/streaming videos during work and at the same time playing PL Story like a maniac:cool:

These are my specs.

-QuickWiz Rom

-009m Faux kernel ( 1.242ghz max - 384mhz min / -75mV )

I undervolted using Fauxclock (Y)

-Froze bunch of bloatware using Titanium backup

I must say, I am pretty satisfied.:)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
That's pretty good. Did you turn off data at all?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] juude90:
I've been switching between WIFI and data because my work has WIFI. And whenever I don't need to go browsing/etc I would just turn off my data completely to save battery. :D
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vpkb:
NexusMod 4 & Faux's Kernel v10 1.7Ghz - Prior, battery would drain to 1/4 by 2PM, now, batter has over 1/2 charge left and it's 8:30PM. I am extremely happy.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Jaysonvstel:
cm7

Im using the cyanotouchwiz cm7 rom. battery is about a full day, and its the fastest rom i have had on the phone out of the dozen or so i have tried.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jnwhatle:
I get to about 20% at the end of the day with moderate (not heavy or light) use.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] watupjjay:
Hello everyone! I looked at yohz's and dubwise's conversation and tried it. Thanks to both of them and all. I am now comfortable with battery life. Here is my result.

.3 att kernel, BoneSTOCKener, JDU, the script UV by dub, screenfilter. few txs, 1 short call, reading, browsing, YouTube (adele daydreamer, not porn cough cough), words w friends, draw something, cartoon wars.

Overall, general use and still 30% in the morning. :)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] watupjjay:
Oh yeah, i turned off haptic feed in keyboard as well. And lowest, brightness setting. Wifi/lte switch with JDU.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] GooSe275:
2.3.5 to 2.3.6 - Happy I changed

I tried 3 or 4 roms on 2.3.5 and never got more then 8-9 hours with a full charge. I tried everything (always making sure programs were closed, calibrating the battery, battery saving apps, and the list goes on...) and nothing I could do to get the battery to last more then 10 hours, short of not using it at all and just letting it sleep.

I switched to NexusMod4 2.3.6 and now I'm getting 20+ hours without even worrying about battery use. Not sure what changed, but I'm glad its fixed...:D

Edit: It would take me 4-5 hours to go from dead to 100% charge and now only takes me 2-3...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
This is the rom I'm using right now, too. Battery life has been exemplary. Initially, when I went to sleep, w/ Wifi on, the battery would drain between 1.5-3%/hr, which was worse than stock. But, after 2 weeks, it now drains less than 1%/hr. This is what the drain looked like a couple nights ago. Went to sleep around 12:45 w/ about 36% remaining, woke up close to 7am w/ 32% remaining.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Steve.99:
This is what i get from my battery on regular work day. This include about 12 hours at work i switch from HSPA+ to LTE when i need the speed for big e-mail or browsing. About 5 hours on HSPA+ outside of the city and about 8 hours on WIFI while im at home. At work i use it to make phone calls, check mail, browse some stuff, use calendar, calculator, also take a lot of pictures and send em trough email tons of other stuff.

What kills the battery is LTE like everyone know so i just switch it off when i dont need it.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
Thanks for sharing results with NexusMod. I get what seems to be terrible battery life no matter what I try so I think the next step is to either load one of these ROMs people are getting good results on or getting a Seidio extended battery.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vizrom:
4 days and still 20% left

4 days and still 20% left

My specs/settings:

Stock rooted

Wifi/Data off when screen off (on demand)

auto sync off

GPS off

Blue tooth off

Most of the bloatware frozen

typical use/day:

30min calls

40min screen on

email refresh on demand

weather refresh on demand

few pics/video

google search

etc..

charge every 3 days

Observed:

Calls are high drainers

as you can see display is not a drainer

dialer draining a lot (after receiving a call)

android system (CIQ is still running)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] theHOTNESS:
can we get some ics leak battery performance up in herrrr?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] gokartracer5:
I got mine a couple days ago and put the ICS leak on right away and rooted. Performance is good, but battery sucks. Which blaotware apps did you freeze/remove?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
I`m waiting to post some results, I`m actually using ICS leak with out the JD. Few things I noticed so far, yesterday in the AM the battery was amazing, where it usually would drain to 70%(with JD) it was at about 85% (again this is with out JD), then when I got to work (LTE area) this is might of been me, playing with the hotspots and other ICS tweaks to get it all working, It drain really quick, where I had to charge it again (really wanted a full discharge and full charge :( ).

This morning after full night charge, the battery showed 87% for some reason, I unplugged/plugged and it restarted charging again, left the house with about 92% at 8:15am played a movie, few TXT, some emails, transferred a file over SMB before leaving the house and its now 11am I`m at 68%. Email is set to push in native client (not GMAIL client), some gtalk etc... So far nice, lets hope it doesnt just drain quickly and have to figure out why it didnt charge all the way to 100% over night.

Screenshot coming later...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] gokartracer5:
Which apps did you freeze?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] NYFan:
What rom are you using for ICS?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Leak ICS as stated....

OK so here is screenshots from last night, I guess ICS change the screenshots to png and XDA app cant attach png files ?

Any the back story is that it didnt charge 100% for some reason and this is full day use, few SMS lots of email, watching movies about 2 hours all together, some phone calls etc.. my regular day use. This is with out JD and I think its pretty good. This morning I was able to get it to charge to 100% so lets see what happens today.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
So I have some positive findings to report. I previously expressed finding the battery life problematic no matter what I tried - Tasker profiles to turn things on and off, JuiceDefender Ultimate, etc.

As a control case, I turned:

all automation off e.g. Tasker or JuiceDefender Ultimate

wifi always on

bluetooth always on

GPS off

screen brightness adjust automatically

Nothing else out of note. In other words forget trying to manage power consumption.

So far I'm finding I end the work day consistently around 75% and the phone seems to be going into deep sleep more often. This is compared to ending the day around 50% or less while actively trying to manage power consumption.

BetterBatteryStats shows no big consumers in partial wakelocks (partially because the biggest culprit Moxier Mail was set to poll every hour instead of push). BatteryDrain says 2.2-3% drain per hour rate when the phone isn't in use, down from the confounding 5% or more when not in use before.

Some surprising findings atleast with sample size n=1 on active power management methods and what difference they seem to make.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mattio781:
I'd post my ics battery stats but xda isn't allowing me to post pics.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mattio781:
Web app works better
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] JHK1984:
There are ways to improve it

It is a big bright screen and it will drain battery - but I'm seeing improvements by turning down the brightness to 2/3, using Juice Defender to configure network connectivity timings and such.

Now getting about x 1.5 of stock battery life.

Good for at least 12 hours it seems.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] POCKATA:
Another one form the ICS leak
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] wutang69:
i've tried a few ics leaks both stock and custom rom, unfortunately my battery has gone down from 16hrs heavy use to 12hrs heavy use. is there any ics leak that goes easy on the battery?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
So I had to go back to SkyICS since ICS was not working out for me, too many bugs....

Anyway, I some how misplaced the backup prior to ICS upgrade and had to go to an earlier one, which happened to be from before I put on dags kernel, so now Im up and running all seems ok, but after installing betterbattery stats app, I see that sdio_al is causing wakelocks, and I think due to that battery sucks again :( anyone know what SDIO_AL is? And how do I troubleshoot it ? To put in realistic terms, I charge to 100% using stock charger while phone was off, took it off got in the car made 1 phone call few text some emails, barely used it for 50 min. I'm down to 85% right now and sdio_al has a wakelock tikes of 6min.......

Im in LTE area..
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Bigpapy:
I love my Skyrocket! 4G LTE Speed goes up to 20MB (download) on my area. The battery life in a normal day it will last 8 hours having my facebook & emails application running.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] PScales17:
Battery Not Great, but Willing to let it go.

Coming from an iPhone which would last me all day while listening to musIc or podcasts, I have to say the battery life on the skyrocket is surprisingly short. However, this is such an incredible phone that I am willing to charge it twice a day!

I use my phone to listen to music pretty much all day long. the battery will last me about 8 hours. But I need the phone for school at nightso I just bought a portable recharging unit and it works great.

LTE is probably the biggest reason for the relatively short battery life, but the speeds are incredible!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] :
My Battery Life on ICS 4.0.3 ROM

I'm currently using the leaked ICS 4.0.3 ROM and found it to be pretty when it comes to the overall performance of its battery life. Here are my personal configuration of my phone:

Wi-Fi - I use it if it's available. 100% of the time at home.

Airplane mode - only when I'm driving simply because my daughter is in the car at times and I tend to not text and drive when she's with me.

Bluetooth - Hardly ever use it since my car has Sirius XM

Calls - 2 calls a day. (I don't talk much)

Texts - I'm a very heavy user when it comes to texting.

Sound - Always on vibrate.

Display - Lowered the brightness to the lowest possible and unchecked the Automatic feature. Also, my screen timeout is set to 15 seconds and the Touch Key Light Duration is set to only 1.5 seconds.

Account and Sync - I have Facebook syncing feature turned off since it always manages to get some of my contacts mixed up. My Google account is set to sync only Google Reader and Gmail continuously. I sync my calendar and contacts manually because I rarely update them so is a waste of battery life just running in the background.

Location Services - Only use it on demand. If I need to check in somewhere then I turn it on if I don't then is off.

When it comes to battery life, GB gave me a bit more juice with my current settings by at least 2 hours. ICS still has a bit of bugs to fix. Even thou my phone is rooted, I don't utilize any of the apps in the market to extend my battery life. Some of those apps uses more battery life than it gives. I will be providing a screenshot I took today of my phone running on an impressive 14 hrs and 49 mins with only 7% left of battery. That's more than I ever got on my iPhone 4s which was closer to 10 hours.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] zxrax:
Your phone is like a deity. >___>
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Wickidmasshole:
Bat life

I am a heavy/very heavy user. I was blowing through my battery in 4-5 hours. But thank god for ebay and hong kong because i orderd up 2 spare batteries that came with a battery charging dock and now i literally go all day and just swap out the batteries. I have yet to go a full day and need a charger. The best part was they were $9.99 with free shipping. If anyone wants the ebay link let me know.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
I'm using the ICS leak right now. Battery life has been hit or miss. On my usual test: while I'm asleep with Wifi on, I get mixed results on the My Battery Drain app. Sometimes, it went as low as -0.3%/hr (beating my results with Nexusmod 4). But, later in the night, it would even jump to -1.5%/hr. When I used GB (both custom rom and stock), battery life usually only varied by 0.2-0.3%/hr. It could be the app... or the leak is doing something weird when it's asleep. I'm not sure what to make of it.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] rojov123:
In the stock rom, I used to get about 14-16 hours with regular use.. That is like about 5 or 6 hours with the wifi on and an hour of games, and lots of texting.

I jumped to skyrocketeer and man, it is amazing. I fully charged and then have been on wifi for almost 6 hours now, downloading apps, playing games, texting, and customizing. The battery is still at 67%. Thats almost 24 hours of good usage..
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] ammour444:
The same problem brother maybe worse even..
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] gokartracer5:
I was good for a while, buy recently it became pretty bad. Whenever I an off wifi, the phone gets really hot and the battery drops like a rock. Can't figure out what's causing it.

Edit: turns out it was exchange email.