yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] daefish:
That's almost identical to what I'm seeing with mine too!

I'm using SkyICS 7.3 (the non speed) and the Skyrocket 2.6.35.14 kernel that's overclocked to 1.7ghz.

Wi-Fi is generally off, as is GPS. Screen brightness usually at lowest but I did have it brighter.

Did a lot of Spotify, lots of texts, according to my usage stats the display accounted for 25% of the battery life, the Android OS/System for another 22% and then Spotify for 11%.

I'm pretty happy with these results for sure!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
For those getting 30-40 hrs of battery, how long does it take to charge your phone?

I've hit those marks a couple times, and for both times, I noticed it happened after I let the battery completely die and let it charge all the way back up. But for both of those times, it took around 3.5-4 hours to completely charge.

It usually takes about 2.5 hrs if I charged say from 2-5% remaining battery. I'm wondering if this is just a coincidence.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] rogerkamp8817:
What battery app is everyone using? I did some searching but can't find the same which shows the graph and what the usage was at different times...

I'm getting ~12 hours on light usage :-/ i just removed a lot of my widgets (stocks, facebook, etc) hoping that doing so will improve my battery life.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Ok, going to try this sky ics 7.3 ROM to see my battery stats.... Anyway to migrate TXT and call logs to the new rom from stock ?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] rabbivj:
use SMS Backup and Restore for txt msgs. Doesnt work on MMS iirc.

ive been using juice defender the last day or 2 on sky ics 7.3 stockish...ive been getting about ~24 hrs with moderate use with about 30% battery life left.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Yeah a bit too late, oh well, just start fresh and see how it goes.

I did restore some apps from TB and fully discharged and charged over night the battery then used the battery calibration using the app and powered off and charged a bit like that, then after turn on did the battery calibration again, lets see how much I can get on a charge with this... I`ll let it run all the way to 0 so I can charge again.

Cant say a great fan of all the blue in the ROM but its not that bad...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
So far not impressed at all ... 3 hours and down to 80% some email use playing my game and mostly in standby with screen off the brightness is at 10%
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
Games tend to drain the battery very quickly. Are you on WiFi or 3G/4G? If 3G/4G, 3 hrs to 80% playing games doesn't sound too bad. If on WiFi, not great, but not awful.

Also, if you just flashed the rom, give it one or two battery cycles. When I first did a factory reset, the battery life was awful (like standby 3-4%/hr on Wifi). After the first charge, it became more normal (standby 1-2%/hr on Wifi).
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
On wifi at home. Little bit of games not much I would say total 10-15 min. Its little empire so its not constant play.

I will try for a week ! Thank god for nandroid backups :).

Can't say I love the whole look of this ROM some how stock seemed better, but I might get used you it.

EDIT:

Interesting just found that LTE is getting closer to my house. In the house I never used to get LTE, now in my upstairs floor I see it sometimes and when I went outside LTE came on.. I dont know if this ROM radio is more sensitive, or they are rolling it out near me quickly... Anyway I think the phone is switching between LTE and 4G ..... even when WIFI is just on.... and this might be draining my battery at home. So real test will be monday whole day....
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
How is this? So far?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] polish_pat:
I charge with stock cable and charger and 3 hours is approximately my full charge cycle
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Was going to take another screenshot, but saw the 7.4 update and got caught up in that, anyway 12+ hours almost 13 first, no phone calls today, only txt was from ATT telling me Im in the 5%, oh and then me checking data usage, emails lots, my game little empire, some pictures, listened to few songs via cars BT, internet browsing etc... pretty much most on wifi.... I guess its not bad, will report my findings tomorrow, but I guess comparison is skewed now that I went to 7.4.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] madmax49201:
I was running sky ice stock with the kernel it came with. I got 1d 18hrs with moderate use didnt get a screen capture. Going on 12 hr 24 min with the latest faux kernel and still at 50%. So far cant beat sky ice stock for battery life. Guess ill have to do some heavy surfing and such to see how well it holds up to that. I'm in a not lte area.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
OK here are this morning/afternoon reports,

So charged over night to 100%. Removed from charger at 7am.... between then and now approx 2pm here. From 7am to about 8:40am nothing was going on just idle, it might of pulled all the email from over night... Then on the train about 40 minutes video and some emails, got to work no WIFI here, just LTE. Very minimal use after that, maybe some SMS, emails etc... and I`m now down to 45%.

I know everyone is saying wait few days, so I`m going to wait till Friday and if its not better revert back to stock(backup). I still dont see how people are getting 20 hour usage .....

I do have to go to a client today at 8pm, I was going to let it fully die to charge it to full again, but since I have to go to a client I cant be with out a phone, so if closer to 5pm its going to be low, I`ll have to charge at least for an hour or so....
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Shelby317:
I'm in a similar layout.... The phone does not do a good job of being on the edge of a 4G and 4GLTE area. I've found that I have to put it into flight mode for 10+ seconds to get it to LTE whenever I notice it's slipped down to just 4G.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Im now down to 39% with basucly bot using the phone just emails comming in.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Something is got to be wrong.....

See below, I did just go outside, used my phone for a bit, but that usage seems very high, it just started accelerating, I will have to start charging soon in order to make it thru the night....

EDIT: I installed juice defender to see if I can help it a bit....
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
If you're on LTE, -10%/hr with light-medium usage is not out of the norm. Do you have alot of widgets? Maybe you can take a look at apps that are running the background (settings->application->running services), and see if anything's running that you don't expect to be running?

Reception also matters. If your reception is spotty, then that'll drink up your battery, too.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Shelby317:
I've got juice defender, but it's not helping much. The bloatware, that never have and never will use, hurts. I've tried a couple of different methods to get root'ed without success... going to be patient and see if ICS helps at all.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Kenneth.Torres:
Go juice defender ultimate :)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Chouie:
I don't use juice defender. I notice the battery percentage it saves...it ends up using it up in the back ground because its idling.

Sent from my SGH-I727R
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Kenneth.Torres:
Have juice defender disable data connection when you turn off the screen, you'll save A LOT of battery
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] JRman:
Juice!

I highly recommend Juice Defender Ultimate! I also make sure to use WiFi at home and work....
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
So far very disappointing with the SkyICS ROM, yesterday as I was stating, I had to go to a client at 8pm, so I started charging at work around 4:30pm till 6pm, it went up to around 40%, by the time I got of the train around 7:15pm the battery was down to 15% ( i was watching a movie and checked email few times), got in the car put on charger, by the time I got to a client it was at 18%, that's around 7:45pm and at 9:30pm the phone was dead ! This is with charging 2 times I couldn't get thru the day ... 7am to 9:30pm. I cant say this is heavy use at all.... I dont know I`ll still wait till Friday if this is going to go on, I`ll restore to my Stock ROM via Nandroid backup, it seemed that battery was better there (which was not good for me :( )
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
I am pretty disappointed with the battery life I am getting. It seems to go down a percent every few minutes with the screen off. 30 % by 5PM today after leaving for work with a full charge.

Have brightness set to around 30%, auto adjust screen image off because I found this did weird things to the colors on images. Tasker turning off wifi and bluetooth when not near a trusted network or my car.

Battery Use says the display and Android uses approx 50-60% of the power. Running stock but rooted with some bloatware frozen with Titanium Backup. Was wondering if maybe No Lock was causing the screen to use more power than the regular lock screen but that didn't seem to make a difference. Only other thing that might are apps syncing in the background but I find it a bit stupid that a mobile phone not be used while mobile.

Any suggestions?

---------- Post added at 09:10 PM ---------- Previous post was at 09:08 PM ----------

Oh and automatic brightness turned off.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Have to look at tasker. Your battery issues sound worst then my by much. Try getting cpuspy and see if SR is going to deep sleep.

Ok so back to me hijacking the thread. Today took of from charger at 7:30 or so and battery was dead at around 9pm, about 1.5 hours videos, some facebook pic uploading, minimal sms, 1 phone call, lots of emails specially at the end since I subscribed at ATT forums regarding 5% issue, some gaming very little, juice defender running and it turned of wifi, had BT on till like 6pm, my screen is always at 10%, I don't know if its a bit better due to juice defender ultimate or just settling in, but after 20+ hours talk I expected more.

Also how come times are diffrent?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
Thanks. I installed CPUSpy and it says in the past 2:53 hours, it has spent 1h47m in deep sleep, 48m @ 384 Mhz, and 9m @ 1512 Mhz. So it seems like it is going to sleep.

I noticed that between morning (fully charged) and the time I got to the office, battery was down to 86%. The phone was in standby/lockscreen during this time and would suggest the LTE radio and/or Bluetooth knocked off that amount.

Once I got to the office, it only went down 83% in an hour's time. It was switched to WiFi and more or less on standby.

I turned on auto adjust screen brightness yesterday to see if that would have an impact on how much power the display is using. So far it is still the largest consumer at 25% of battery (Android OS next with 14%), but this is down from 50-60% of battery consumption with auto adjust off and brightness set constantly to around 30-40% on the slider.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Interesting.... I would suggest Juice defender to see if it gets better, just try it for a day .....

1 more thing I would try is to see if tasker it self is using up battery ...

Thanks for answering my PM !
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
Have any of you used My Battery Drain Analyzer from Waza_be?

It's on the market, and calculates battery drain after each percent drop. Seems like a good tool to see when your battery drains the most... especially when you're asleep.

On my phone, I see that something is draining the battery a couple hours before I wake up.

I'll have to charge my phone to 100% before I go to sleep, and open up battery status in settings when I wake up to see what has been causing it.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
I just downloaded the app, only concern it says it wakes up every 2% drop, wouldnt it cause more battery drain ?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
When I checked w/ CPU Spy, it didn't look like sleep time was really that affected. Nonetheless, I'm sure it uses a little battery... just like Juice Defender. I look at this as more of a tool to narrow down what is causing your battery drain. After you find what has been causing your battery drain.. or if it it proves useless, just uninstall it.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] haloeight:
No problem.

Someone else suggested today that Tasker itself might be eating up battery with its activity, as they found a significant improvement in freezing the app. I haven't tried it myself and they have a different phone but another possible lead.

This person also found auto-adjust brightness to be ineffective for reducing display battery consumption, but so far today display has clocked in at 29% usage versus the near 50% consumption before with auto adjust brightness on. Still the largest consumer of battery, but down.

Second is Android OS at 12%. Another possible lead is that there may be app or background processes lumped into here instead of showing those apps individually. Would make sense since Tasker never has an entry.

During the day I found that the drain in standby was approximately -3% per hour. At 5:40 PM had 47%, which is an improvement. Was expecting 60% at the rate of drain but was using it more heavily during some periods.

I have this installed since it was released and says final result is -6.74% per hour.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Ok so my results from today, I had BT off whole day exept at the end, Made about 3 phone calls but overall same

I guess I have to live with 13-14 hours with light use :(

I did notice JD showing up in the battery usage with 2%. Oh well lets see for few more days, I hope it gets better.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
It looks like WiFi is not on very much at all for you. HSPA+ and LTE drain alot more than WiFi. Also, what is mediaserver? If that's video, that'll consume alotta battery, too (not to mention your screen would be on the whole time). Reception matters, too. Toward the end when your battery was really taking a dive, it looks like you had very weak phone signal.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Im assuming media server is from watching video, I watch video in the train to/from work. We cant have WIFI at work... I think the weak signal is at my house, but I`m not 100% sure since that shows a huge time span. I guess 14 hours is not that bad...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Dubwise5446:
Wanted to post up my battery results. Here's the details of my setup for those who are interested. Hopefully this will help out you guys who suffer from poor battery life:

-Da_G .3 Kernel: 1566Mhz Max, 54Mhz Min, 87500mV UV, Ondemand governor.

-CPU settings done via script and not SetCPU or System Tuner

(Anything > .3 kernel and I have SOD issues. I've found faux123's kernel to be really fast, but chews up battery life pretty good with the same settings.)

-Juice Defender Ultimate

-Stock rom with Bloatware removed & a few custom visualization add-ons.

-Startup script to disable CIQ and Facebook services.

-Should also note I never use WiFi, since LTE in my area is faster then my WiFi.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Few questions, can you please show your screen with the graph ?

Second I`m assuming thats a rogers stock ROM not ATT and you are on Rogers service ?

What are your JDU settings ?

Also is I see that your display is below system, if your phone mostly on standby ?

Also if your BT always on ?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Dubwise5446:
BT always on, yes.

If you have anymore questions let me know and I'll try and answer.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Were interesting and thanks for the reply ! I will be trying the DA_G kernel on SkyICE ROM, is it possible for you to provide the scripts you used to set your clocks and UV ?

Is there a reason you are not using any apps to set it?

So you are not recommending going to the latest kernel ? Just stick with .3 ?

I have my brightness at 10% are you below that ?

THANKS AGAIN !
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
That is phenomenal battery life on LTE, even if your usage is very light. Since you use JDU, do you have data disabled at anytime (aka screen off, etc)?

Newb question: I've seen instructions on flashing, but I couldn't find any info on running a script. By any chance, you know some helpful links?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Dubwise5446:
The script I used isn't anything out of the ordinary. I can't remember if .3 supports init.d scripts, but I simply added this line to the end of the /etc/init.qcom.post_boot.sh:

echo "-87500" > /sys/devices/system/cpu/cpufreq/vdd_table/vdd_levels

Also should note that this is the lowest stable UV I could get on my phone...Just looked and I have the CPU max/min settings commented out as I believe out of the box .3 comes with 1566mhz max and 54mhz min, however if you wanted to change the settings you would add to the file above:

echo 1566000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq

echo 1566000 > /sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq

echo 54000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq

echo 54000 > /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq

The reason I chose to add the CPU settings via a script is, in my mind, it seems counter intuitive to install another program to do it when the kernel gives it to you for free w/o the addition of programs sitting in memory.

Any frequency over 1566mhz and I started getting random reboots/hangs with .3. I have not had luck w/ any Da_G kernel > .3 due to Sleep of Death issues. Your results may vary though. Cant hurt to try them out and see which one suites you best. I'm satisfied with the stability, battery life and speed of the phone, so I don't see any reason to upgrade as of this point.

My brightness slider is down pretty low. There isn't any percentage listed in the settings. Maybe you can enlighten me as to where the percentage is and I can tell you what mine is set at.

If you have anymore questions let me know and I'll try and answer. Originally I was pretty frustrated with the battery life with this thing out of the box, now its beyond my expectations. Hopefully this will help you out...and you are welcome! :)

---------- Post added at 08:27 PM ---------- Previous post was at 08:18 PM ----------

Yes, when screen is off it turns off the data connection. I have it set to turn on the data connection every 15 mins (when screen off). Also have the night setting enabled which turns off data connectivity from 2am <-> 6am.

See above for the location of the script I edited. There are lots of different ways to edit the script. That one I mentioned will run once at startup (only needs to run once to set the CPU speeds). I'm sure its been covered before on here on how to run/edit a script. Run a search and if you can't find anything useful I will try and help you out.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Thanks again. I guess I will try the .3 kernel and see what that gets me ! Just wonder what I have to flash back to if its screws up on SkyICE ROM or I can just go back to my original STOCK ROM and flash it there... (rather not)

I use the "brightness level" from market to check the % brightness is on...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Ok installed the new kernel now trying to write to /etc/init.qcom.post_boot.sh having some issues as its read only, but I`ll figure it out eventually :) Kernel seems fast !

Ok never mind was able to edit it, mounted the / as writable in ES. How do I check that the UV took ? seems to be much snapper now, the phone is flying ...

IF I put this echo "-87500" > /sys/devices/system/cpu/cpufreq/vdd_table/vdd_levels in terminal manually the phone reboots, is that normal?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Some how my battery took a turn for the worst after kernal install. Ill drain it today reset stats in AM and will see how it goes. Still want to make sure my UV is right.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
So just to be clear I was dead shortly after, so I`m hoping this was because I did nandroid backup, and lots reboots and terminal typing, but seems kind of fast.... So will see tomorrow, I still think I`m not UV, but not 100% sure how to check that to be sure....
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Dubwise5446:
Initially I'd recommend you under volt via system tuner (in app store). You can under volt in increments of 12500mv.

Also keep in mind, every phone is different so your under voltage may vary. I'd start with 25000 and work your way up from there in increments of 12500, to see which voltage your phone is most stable at.

Once you think you have found an acceptable, stable UV setting then add the line above to the bottom of: /etc/init.qcom.post_boot.sh and freeze sysetm tuner. Don't run it in the terminal or the settings won't stick upon reboot.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Ok thanks I guess I`ll start with that .....

I`m debating to go back to the stock ROM or stick with skyICS... I`ll try UV, I`m assuming that my settings didnt stick...

I do understand regarding settings not sticking after reboot from terminal.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Best I was able to do is -25000 lol, anything else and the phone reboots.... Not sure how you got so high as 87500, I`m assuming due to that you have a great battery life, I guess I can try with Stock ROM and this kernel and see how much I can put then...

Ok all of the above is wrong, :)

I figured out that I had a senior moment and was downgrading the voltage at start up and then thinking its not working, so trying in the terminal and phone would reboot. I`m pretty sure I got it UV now and its working fine, will use it for few days to see how is the battery compared to stock ROM and compared to stock SkyICS rom.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] bluecrush69:
What app is the first picture of?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Battery Drain as suggested here in this thread.

Ok so today with the new kernel seems to be better but no where near what was shown before, I will upload pictures shortly I seem to be stuck on 7% now.

Edit: I have been going between 6-7% strangly for last 2 hours. I think battery needs to adjust. Now Im getting exited. It shows 16+ hours now. And just went to 5% :) will post shortly more ss.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Here we go

Better!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] sk8erwitskil:
attached: my battery results.

this is with a 3850mAh battery i got off ebay, heavily undervolted, and turning off things when im not using them (wifi,bluetooth,data, etc.)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
Yeah but you are charging, try a full cycle with out a charge and lets see your results :)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] yozh:
So WOW Saturday morning I charged to 100%, unplugged phone, shut down, plugged in let it charge to 100%, turned on, used battery calibration app. And have been unplugged since. Check out below, now Im amazed.

Did have 1 snag, and Im not sure if its a real SOD or just phone frooze, but it would not come on, when press power button it would vibrate, but screen didn't come on, the volume seemed to change from silent to higher ringer as I heard sound, and vibrate when brought all the way down, I should of tried calling it, but I pulled the battery and it restarted fine. Is that what you guy see as usual SOD or was that a diffrent freak out?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] helio2k:
Nice results keep theme coming :-)