yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
http://xdaforums.com/showthread.php?t=1759541

My thoughts:

1. 50% in 8 hours of moderate use is, imo, not terribly unusual for a Skyrocket without a ton of fine-tuning done to it. The Skyrocket, in general, is not a marathon-runner of a phone. It's better for short sprints, although you can (as I have) make it a marathon runner with extensive tweaking.

2. I haven't tried all the ROMs you've listed, but I can tell you that CM9 on my Captivate and my Skyrocket had severe wakelock issues. My Skyrocket's battery would drain off at twice my usual rate when I tried it, and the ROM prevented my Captivate from sleeping at all (I was lucky to get six hours out of a charge--at best). It's not my favorite ROM for battery life. SkyICS, in my experience, is the absolute best battery life of any ROM.

3. Get rid of JuiceDefender and SetCPU. JuiceDefender works primarily by preventing applications from doing what they want to do. Common sense dictates that when a computer program is unable to do an assigned task because its primary method of doing so is blocked, it will try something else. That "something else" may or may not result in a series of wakelocks. SetCPU is designed for single-core processors. The changes it makes will usually affect only one of the two cores in a Skyrocket's CPU, causing the second core to do weird things. I do, however, recommend using System Tuner. All you need is the free version, because all you need to do is lower your min to 192 and change your governor to ondemand or conservative (I use conservative). You're not forcing new profiles onto the phone's CPU, just giving it a little "attitude adjustment".

4. Get rid of the Facebook app and replace it with Friendcaster. Like, now. The Facebook app uses battery and data even if you tell it not to.

5. Have you downloaded BBS? If so, are you using it to track down your wakelocks? I've got a post inside of the above thread that explains how to do so and, well, explains just about everything else I've already said here or would say if I continued. So, yeah, just read that thread. It's not terribly long, and there's a ton of great info in the OP and throughout.

For reference, I'm a light-to-moderate user of my phone, not as heavy as you by any means. I'm not in an LTE area, which helps. That being said, with the Nexus extended battery, I'm now at 2 days, 5 hours and still at 23% charge. I used the phone very heavily while traveling a couple of days ago, starting at 7:00 AM Eastern at 100% and ending at 11:45 PM Mountain with 11% left, 4h45m of screen-on time.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
I just find that odd since I find people giving great stories with the SKY ICS and others in terms of battery life. Ironically, I've found that SKY gave me some of the WORST battery life which really made me feel like a dolt. Here's the latest battery stats attached. Perhaps my view of things is skewed though because my day starts at 6am and I'm at work by 7 (with my phone typically turned on at 6:30) so I still have a good portion of my day left by the time I get home and my phone is typically less than 50% by that time. It's weird to know you have about 7 hours left in your day and your phone is saying like 40% power left.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
What's your screen-on time in those screenshots? The frequent wake-ups make me think that you've got some rogue apps syncing when they shouldn't be.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
Hello OP, I have exactly the same problems as you except i'm still running stock (rooted with frozen bloat). I tried the Galaxy Nexus Extended Battery and from stock it was more horrible. appox 1 hour less than the stock battery. I did try not using my phone like normal (about 25 mins of screen on time) which was a PITA because mobile internet is my only way to sneak down time while watching my toddler son. The battery lasted 11 hours. With stock battery, I would've lasted around 10 hours. A lot of people say it might be bad battery BUT how can I have such terrible luck to get a bad stock and a bad GNEX ext batt??? lol. So I ordered the qcell 3800mah extended battery and boy I won't be looking back!!!! I am currently still at 25% battery, 17 hours 20 mins with 3 hour 38 mins screen on!! I watched two Naruto episode last night and didn't have to worry about my phone dying while I'm sleeping and end up not getting important calls from husband early in the morning. The hump doesn't look great but it does not bother me when I'm holding the phone and I have small hands. The weight is a little bit on the heavy side but for so much more battery hours, I don't think you'd mind. Now, if you are the type who is always out and can't find sockets all the time, I suggest you try this qcell ext batt. for $20 you can't go wrong. I know you'd hate spending another $20 but trust me the battery works wonders.

On a side note, i also ordered a charger for my standard and GNEX battery from ebay so I can charge them independently if i ever have to go on long long trips and need super juice. :) That's another $4, takes two weeks to get here from China. There's a hack here in XDA somewhere to make it a really fast charger because it is really a SLOW charger despite what their ad claims.

Good luck!!

PS: I also bought the SetCPU since everybody swears by it. I never saw any difference.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
I just checked and it says 1 hour 4 minutes. There's NO way it's been on that long, or at least not with me looking at it, and I usually turn off my screen when I'm done as opposed to letting it go to time out, which is 60 seconds anyways. I'd say 30 minutes would be it AT MOST.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] :
Is it in your pocket a lot or out of sight
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
My goal is to avoid the super extended battery because then it means I need to buy a whole new case as well. I'm one of those people that "needs" a protective case because the only reason I have the Skyrocket is because last December my 1 year old took my beloved Nexus One and threw it down 16 flights of stairs. The phone then entered a vegetative coma state and never recovered. I can't have that happen again. So basically I'd have to buy the new phone then buy the new case. I'm trying to spend as little extra money as possible.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
well, there are hacks floating around with otter box to fit the hump back. I'm sure you will find other cases from ebay that can be hacked this way too. I don't have this problem since Ii use my phone naked because i only got it for $10.00 :) and my other line is due for upgrade soon. anyhow, it really depends mostly on what you would rather have, battery life or case. It could be the phone but most likely AT&T will tell you that smartphones consume a lot of energy and if you are not within that 30 day period anymore they'll probably give you a refurbished one and you might end up with a more dud one than the one you already have.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
I try to keep my phone out of my pocket because I don't think cell waves near my "area" is a good combination. When I am at work it's on my desk for about 7 hours, and then at home I usually leave it out (at a high elevation away from my daughter of course.)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] :
Does your screen kick on when you get notifications do you know
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
That's still a little high. I was going to ask if your volume rocker wakes your phone, as that can be a big phantom screen-on culprit, but if your phone's on you desk most of the time...

Download BBS and pin down your wakelocks and alarms (which cause wakelocks) from there. If your phone's not suffering any extreme drain from a rogue app or process, then you might just be at the best you're going to get for your usage.

Have you tried different radios at all? I've heard those can have a minor effect on battery life, depending upon your area.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
No but the 4 buttons do as it is a CM9 feature. Honestly though they aren't on for very long as I usually am near my phone and notice such things rather quickly.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
I don't use the volume rocker for waking just FYI.

I got BBS. It looks informative but I'm not really sure what I should be focusing in terms of statistics and what, if anything should jump out as problematic. Any tips?

I have tried at least 4 different radios but I haven't noticed any major difference between them.

I just saw that CM9 has now been officially released in stable form. Maybe that will help. I'll try that ROM now. I hope CM9 is not the issue, as I've always been a "Vanilla Android" kind of guy and I really like how ICS is designed. I never liked how the other ROMS still had touches of Touchwiz in them. I especially don't like how it mimics iOS styles so much. I mean, I'm definitely pro-Samsung in the major lawsuit, but Apple has more than a few valid points in their argument. Having similar icons and a SMS theme that basically mimics iOS isn't going to help Sammy in the big lawsuit.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] ocariee:
True, it's a well-known problem. You may find some rom with better battery life (here is the rom I'm using: http://xdaforums.com/showthread.php?t=1436854). You can also download some apps that save your battery. Try to turn off GPS, Wi-fi and data when you're not using, and also do not keep the brightness of your screen too high. I hope these would be helpful to you.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
Check the link in my sig for details on how to really use BBS to improve your battery life. You're not that far off of a normal battery life for moderate to heavy usage, so just tweak it and go from there.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
The thing is though is that I don't consider myself to be a moderate to heavy user, but more of a light to moderate. As I said, on a typical day I answer maybe 5-15 text messages, check Facebook/Twitter a handful of times, almost never get emails sent as I have no life, do almost no web browsing, and maybe take a phone call or 2. I very rarely play games and even less often stream media. My gmail is push but that's about it. I also use Touchdown for Exchange but that queries only once an hour. Am I still being unrealistic with my expectations on my battery?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
Something definitely seems off, and you may well have a bad battery or even a bad phone. Try to go through and clean everything up in terms of wakelocks and any possible rogue apps. If you're still in bad shape after cleaning up your phone, something seems off. Mobile data does chew up more battery than Wifi, but not THAT much, and especially not in an HSPA area.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
I don't think it's a battery issue. I've used the OEM and the Galaxy Nexus extended battery and both are delivering similar performance (although GN is slightly better obviously.) And as I mentioned, when I was in an LTE area my battery was getting beat down like Homer Simpson in a fight with Drederick Tatum.

Would it be advisable to try a FULL wipe of my phone? When I was installing CM9 today I saw the option to format EMMC. Should I try doing that or wiping other stuff or would that just do more bad than good? Should I try wiping that and/or the SD card?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] solarpowered:
Mine is at 73% after 11 hours and part of that was listening to pandora all night while I slept. I've been very happy with the battery life especially coming from the Captivate (seemed to need charging a couple times a day sometimes).

I'm running Sky-Ics on it if that helps at all.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
Yeah I've tried SkyICS a few times (both Rogers and AT&T builds) and I haven't noticed any real improvement in battery life. If anything it made it worse at times, which REALLY annoyed me since people were praising how great their battery life had become as a result.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] bevybeast:
Hi im using AOKP, battery life realy sucks and the mobile slows down when im playing HD games, scrolling pages is also a headache, please help solving this...

If not please suggest a better rom.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
Hmm...SkyICS Dragon base is the best battery life I've found. Are you giving it a couple of days to settle in before making a judgment call on it? Also, what kernel are you using? If you're sticking with a CM9/AOKP-based phone, Instigator's kernel is the best for battery life. If you're going to try SkyICS again, use Seanz's modded UCLF5 kernel, as it gets much better life than the modded UCLF6 does.

Read this thread. No joke. Just read this thread. Tons of answers right here. You don't even have to search. Just read a couple of pages.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] :
Careful guys if you start turning this into a best rom thread I will have it shut down you want suggestions I suggest create a standard of reporting aka posting screenshots of your graphs screen on time bbs reports all that and have people help make suggestions based on your stats

---------- Post added at 10:23 PM ---------- Previous post was at 09:44 PM ----------

http://xdaforums.com/showthread.php?t=1831528

I started this thread in hopes it will be the only battery life thread in the future please take a look
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
You'll have it shut down? Sorry, I must be color blind, because I don't see any red in your name.

The topic of ROMs affecting battery life was brought up by way of the OP having tried several. Discussion ensued, not geared towards which ROM is best, but geared towards battery life results we've seen with various ROMs. The OP added several screenshots to the first post, which have been used as the basis for helping them figure out what's eating their battery. Battery life of ROMs is a valid question, and no, I'm not going to wipe my phone and install CM9 just so I can take a screenshot of it eating my battery life like a fat kid in the buffet line. Some things in life just have to be taken at their word.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] :
No I'm not a mod but battery life statistics on roms vary by person and by use so you can't say one rom is better than another based on your experience compared to his experience. I can say I got the go ahead by our moderator to create the thread in hopes of making it a one stop instead of a bunch of battery life threads. There is no best rom all you have is your experience which could be different from others. If it turns into a this rom is the best for such and such then normally my reports go heard its better to asses ones current setup and see what can be done and not suggest all sorts of rooms.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] clip1003:
Your batteries are doing far better than mine. Been on superuser, CM9 and CM10 with lots of different kernels. Each are about the same. Some days it's great, others my battery is <50% in 4 hours. And that is using it MAYBE for 30 minutes. Best I can do is switch off WiFi, bluetooth, etc...and run my screen brightness at it's lowest. I also am running the Badass governor and my low is 192 and high is 1512 still. It does go to deep sleep. Checked for a wakelock issue with CPUspy/BBS and that's not it. Reboot after charging just in case, same thing. Just plain ol' crappy battery life. Someone suggested resetting the battery stats in CWM but the only reason I could think to do that is with a new battery. Thoughts? Tried JuiceDefender and a couple other battery helpers and nothing helps.

Edit: Took TJ Bender's advice in his Wakelock guide and removed Facebook and installed FriendCaster. What a HUGE difference that made! 3 hours and only dropped 2% battery. Normally I'd be down around 15-20%. Would def try that, pretty sure that's what was killing mine. Will keep you posted on the outcome after a day of monitoring.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
I'm going to try the Instigator Kernel w/ Badass and see what happens.

As far as removing Facebook goes, I'm not sure how much it has helped with battery life, but I still will use Friendcaster simply because it has the one feature that was stupidly removed from the official FB app, which was the ability to choose which album you could upload photos to. FB had it but took it away for some arbitrary reason, resulting in ALL your photos going into the stupid "Mobile Uploads" section. Glad to see that Friendcaster brings that back.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yavihah:
thats odd , do you have the stock battery? Mine drains out even in deep sleep when I had sky ics with setcpu and all. Bought the 3800 mhz extended battery and lasts all day with moderate use and has around 45-50%
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
Removing Facebook alone shouldn't make that big of a difference. Almost seems like a bad install of Facebook (maybe even from the factory?) was causing other problems.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] clip1003:
I am thinking it was due to it fc'ing all the time. I had tried to clear the caches, freeze, unfreeze and even uninstall and reinstall. Just doesn't like my phone for some reason. Friend caster works great and battery has only dropped a total of 18% in 9 hours. I can live with that. Great advice!

Dispatched from ye ol' Skyrocket running TeamChopsticks CM10 a2 4.1.1 JB w/ InstigatorX 6.1 kernel
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
Oh, yeah, if FB was FC'ing all the time, look out. Also, keep in mind that alpha ROMs typically have higher battery drain than stable ones. But, hey, they're loaded with cool features. Besides, if they worked like stable ROMs, they wouldn't be called "alphas". :D
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
I just looked at my BetterBatteryStats, and should I be worried that the "Awake" function is for so long?

See attached.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
Yes. You should not be awake for 20 minutes with the screen off in two hours of use. Check the link in my sig and go after the wakelock(s) causing that.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
In a perfect world, should "awake" be the same length as Screen on, or as close as possible?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
It will never be the same, because there will always be applications waking your phone up for some reason or another (i.e., an email app fetching messages, a news app syncing, etc.). There's no real benchmark for the deep sleep state, because everyone's will vary by usage. I'm typically around 93-95% deep sleep in a battery cycle--as high as 98% on very light usage--but I'm a fairly light user. Guys who use their phone as their primary means of communication or use it heavily for work could run through cycles in the 70% range, or even lower. The goal with wakelocks isn't to eliminate them; if you have zero wakelocks, it's because your phone is turned off. The goal is to minimize KWLs and clean out as many PWLs as you can in order to get yourself comfortable with the overall deep sleep time.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
Another thing that annoys me is that if it turns out that it is a phone issue, I can't share most of my information with AT&T to justify why I deserve a new phone. It's not like I can go in there and say, "Look, this phone has had bad battery life since I got it. I've rooted and installed multiple custom ROMS that removed all your AT&T bloatware along with various tweaked kernels, modified radio files, and even analyzed my wakelocks and nothing is working!" 75% of my evidence voids the warranty, and I doubt I'll run into a fellow "power user" at the local AT&T store who would level with me and be like, "Yeah if you've done all that and you still get bad battery life then clearly your phone is messed up."
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] kishke:
You could try bricking it mid kies update and hope they will simply give you another phone instead.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
You don't even have to do that. Reset the flash counter (there's a tutorial for doing so on this forum) after reverting to stock, then go back in, tell them the phone's battery life is terrible and way below what others who use it are reporting, and that you've tried different batteries with the same results. If you're outside of the 30-day window, they'll at least help you out with the manufacturer's warranty.

I would advise against ever intentionally bricking a phone for warranty purposes.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
I won't try and brick the phone. I'd just do a counter wipe and revert to stock as mentioned here. Thing is it's just a pain in the ass to go through all that. In any case I'm still evaluating the new ROM/kernel so probably after this weekend I'll know better what to do.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
Here's a quick update on this:

After about 2 weeks with this I have noticeably improved my battery life. My standard battery now lasts about as long as my extended battery did before I made any changes/monitoring. My wakelocks are down, although sometimes I'll check and it'll be abnormally high (meaning a large gap between awake and screen on time). I find that doing a reboot will often fix that.

Having said all that, battery life still isn't quite where I'd like it to be, but at this point I'd rather just deal with it as opposed to going through all the hassle of wiping , using ODIN, returning to stock, resetting the flash counter, and upgrading to ICS via Kies before returning it with no real assurances that the next phone I get won't have problems of it's own. The battery issue is more of an inconvenience than a legitimate problem, as it's very rare that I don't have access to a charger in my home, car, or office, so I doubt my battery will be dead when I REALLY need to use the phone.

Thanks all for the advice and tips. Hopefully others can use it as well.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
Good attitude on your part: if you can live with it, don't mess with it. Every time you flash you're rolling the dice on something going wrong. Good call in my opinion if you've got it to where you can live with it.

Not sure if the Sprint deal (detailed in the GNex Extended thread in Accessories) is still going on. If so, you could land a new GNex Extended battery for somewhere between $6.50 (incl. shipping) and free (incl. shipping).
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
Looks like the deal (was) sort of active, but I have enough issues with the extended battery I have. It barely fits in my case and I am not handy enough to shave down the battery to get it to fit. Also I'm not a big fan of the weight it adds to the phone. I'll probably next use the extended battery when I head to San Fran and will be in an LTE market, because of course where I live there is no LTE coverage.

[Quick Rant] After all, people in Vermont deserve LTE before those who live in 1 of the 3 states that make up the well known "TRI-STATE Area." [/Quick Rant]
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
Sorry to resurrect this thread but something else has come up with the wakelock issue.

One thing that has come up more as of late is a thing that says "Good Signal." It's often in the top 4 listings. Should I be concerned about that or is that a "good" thing to have like "Deep Sleep"?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] T.J. Bender:
AFAIK it just means you have a good cell data connection. Nothing to worry about, and I've never found any wakelocks that appear to be connected to it.