Database Users

[POLL]Battery life in JB is.....

Please post your battery life experience in here. I am doing this because if Samsung does come here from time to time, let us show them how many users experience poor battery life with the JB rom. Also, let us ignore wipes or full resets since people may receive this update via OTA or Kies and they should not have to do a full wipe or reset to get a good battery life.

No doubt it is better.

Why make another thread....
Sent from my GT-I9300 using xda app-developers app

It's definitely about 30% worse.
Common, do you really think project butter is free?

parhelion69 said:
It's definitely about 30% worse.
Common, do you really think project butter is free?
Click to expand...
Click to collapse
Yeah I think because my batter life is so damn good.

jb
mine is better than ics in jb. using android revolution hd 12.

If i fully charge mine before i go to, then by the time i wake up after about 7 hours, ive only lost 2% battery power.
Thats with data still so not in flight mode or with the phone turned off.
Sent from my GT-I9300 using xda premium

I've tried litterally every JB leak so far inckuding the official ones.
I got sick of having bad battery life on all of them, no matter if I wiped etc.
So two weeks ago I put the very first stock rom on my phone (dated may!), and let it run auto updates from my carrier.
It ended up on LH3 and the battery life is night and day better. I'm getting over 24 hours easy now with what I consider to be decent use -phone calls, lots of facebook, whatsapp, browsing and at least 90 mins of mp3 playback each day. I leave wifi, 3g and BT one the whole time and it always gets over 24 hours.
Today though I flashed the newest UK Hutchison 3G official JB as it's my carrier. I'm going to see how this goes but I'm not expecting it to keep up with ICS. I'll be very happy if it does though.

It was terrible on JB for me (less than 24 hours of moderate use).
I disabled google now and installed juice defender and I get at least 2 days and maybe 3 if lighter use.

Swedish ROM is by far the best in battery life.
Sent from my GT-I9300 using Tapatalk 2

Battery life for keeps getting better with each jellybean update. Currently on omega v28 with perseus kernel and battery life is the best its ever been. 24hrs easily with 5± hrs screen time.

On Jellybean i get 6hrs on screen at 25% brightness and 16hrs idle with Wi-Fi off during sleep and whilst using mobile data
WanamLite 4.0, Siyah 1.7RC1 -100mv CPU and -100/-125mv GPU coupled with dualcore only at 1.2Ghz and touch-boost for 600Mhz at results are shown above and below whilst remaining lag free
Other tweaks: EXT4 optimizations, Multi-tasking fix, SQLite tweaks, SD card cache increase for internal&external to help maintain speed

16 hours max and my battery is empty, crazy...

mdfpido said:
Swedish ROM is by far the best in battery life.
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
Try switching radio?

Sometimes, battery need more than 2days to settle down. It took me 1week to start seeing my battery performing on par with ICS rom.
Sent from my GT-I9300 using xda app-developers app

With Google Now: Very bad.
Without Google Now: As good as ICS (very good)
On Polish ROM

monoespacial said:
With Google Now: Very bad.
Without Google Now: As good as ICS (very good)
On Polish ROM
Click to expand...
Click to collapse
Agreed.
People complaining about battery life: Disable Google Now and untick every option in Maps!
You will see a huge difference.

Black Dawg Down said:
Agreed.
People complaining about battery life: Disable Google Now and untick every option in Maps!
You will see a huge difference.
Click to expand...
Click to collapse
If you disable Google Now it just disables the notifications that it gives you and you can still make searches right?

Ics was much better
Gesendet von meinem GT-I9300 mit Tapatalk 2

Disabled Google Now, and all maps options.
Battery life is epically rubbish, as expected.
Back to ICS I go.

How long your battery last with XXLSJ (JB) ?

my battery dies so quickly compare to ics
100% to 73% in 2 hr 54 min with only 15 min of screen on time

for me its good...same as previous stock 4.0.4

Maybe is time to change your battery...
Inviato dal mio GT-N7000 con Tapatalk 2

Compared to LPY 4.0.4 it's pretty bad

Not good as cm9 that's for sure
Sent from my GT-I9100 using xda app-developers app

I am getting a 10-12 hours backup with heavy and moderate usage!!!
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It's the first test release, what did you expect?
Sent from my GT-I9100 using xda app-developers app

no problem here .....battery is good

I got 18hours + 3hours and 35 mins screen time
Sent from my GT-I9100 using Tapatalk 2

pretty crappy battery life at the moment... but as OriginsOfLewis said, its a test version so i wouldnt expect too much... i have been using JuiceDefender Pro to keep the phone alive for at least most of the day... but without that it would survive half for maybe less than half a day...

my battery drains so faaaaaaaaaaaast :/
i will hope that fix it when release the final version

If you guys having some battery issue or drain battery. I suggest you need to change your battery. Its not a firmware anymore. Because i also experienced this i purchased new batt then no more drain issue already.
Sent from my GT-I9100 using Tapatalk 2

Mine has notiably decreased. I solved a lot of it by freezing crap loads of apps and making a lot of adjustments with the autostarts app. One notable differace that I didn't expect was a few non-system files with 'test' in the name that was appearing under "Media" in the battery usage part of settings. I still have faster drain than normal and am not convinced I'll stay with this build just yet or not; it will take some days of testing. One good thing I noticed was that with a poor signal after being off of wifi for a big chunk of today, it didn't drain any slower than when I had a good signal.
The above said, though, about my battery life, I was previously also using autostarts with a heavy set of disables and had Dorminix with some severe tweaks. I actually stayed on AOKP as a result of better control over what ran actively (back button to kill maps for example) as the decisive thing over being on 4.04 prior to this release. Even on 4.0.4 I got worse battery life than the AOKP build that had the Earth and Moon aligned for my particular handset. Glad to have the Samsung camera back for the time being. Maps seems to draw WAY less than on the AOKP builds on Samsung as well, including this update.
ryn888 said:
If you guys having some battery issue or drain battery. I suggest you need to change your battery. Its not a firmware anymore. Because i also experienced this i purchased new batt then no more drain issue already.
Sent from my GT-I9100 using Tapatalk 2
Click to expand...
Click to collapse
It seems like a coincidence for a number of people to all have more battery drain, due to a dated battery, when they all go to a new ROM. Some people have issues, some people don't. It seems to me that its more a device specific thing than a mass placebo effect resulting from an update. I could be wrong though, since I'm partially making the assertion based partially off of my own handset and battery.

Battery not Charging
i have updated to JB 4.1.2, 2 days back but i am facing a strange problem. My battery is not charging more than 67% even charging for more than 5 hours. its becoming HOT and after 67% its not charging more .. it is OK on all other Stock and Custom ROMS.

Battery Life, in my case, is considerably better than under 4.0.4, and it's not even comparable to CM9 or CM10 that always died very fast on me.

for me its even better, i got 18 hours of battery and still 38 pacent left... 40 to 50 messages, 30 min of wify etc

I still got 23 hours, the lastest ICS version last for 27 hours and 17 minutes

So it's the battery is it?
"Stable" ROM to a test release and it's the worn out battery, which was fine on the previous "stable" ROM, that's causing the piss poor battery run-down?
Sent from my GT-I9100 using xda premium

ryn888 said:
If you guys having some battery issue or drain battery. I suggest you need to change your battery. Its not a firmware anymore. Because i also experienced this i purchased new batt then no more drain issue already.
Sent from my GT-I9100 using Tapatalk 2
Click to expand...
Click to collapse
it was working just fine in ics day before i installed XXLSJ

The second cicle of JB is better, i disable lots of junk app, activated power save and lower brightnes and there are the results.
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[Official] [N7100XXDLL7] Battery Drain Thread

Samsung recently released a software update (N7100XXDLL7) to the Galaxy Note II and this update is reported to suffer from battery drain.
*Owners of the Galaxy Note II who installed the new software update reported us about the battery drain issue.
We of SamMobile have also tested the new firmware and we can confirm that the new update indeed drains the battery much faster than previous firmwares.
The new software update (N7100XXDLL7) fixes the infamous Exynos vulnerability,”Sudden Death” issue and resetcode bug but brings battery drain.
*Samsung itself did not give any comment on this issue*yet, we expect a new update based on Android 4.1.2 before the newer Android version 4.2.1 / 4.2.2 firmwares.
If you have the same problem with your Galaxy Note II please let us know in the comments!
Source: Sammobile
If this post finds you useful please thank s

Re: [official] [n7100xxdlk7] battery drain thread
I ended up reverting back to 4.1.1 because of wifi issues and battery drain. It seems like Samsung pulled the 4.1.2 update because OTA no longer finds it. Maybe that's an indication that they're working on it, fingers crossed.
Sent from my GT-N7100 using xda app-developers app

I have battery issues. Drives me crazy. But still much better battery life than my other devices. haha.

Re: [official] [n7100xxdlk7] battery drain thread
I cannot revert back because I am one of those unlucky bastards that used to have the SDS bug.
I also encounter battery drain and honestly it's annoying. Hopefully they'll fix for it soon.
Verstuurd van mijn GT-N7100 met Tapatalk

sz1a said:
I ended up reverting back to 4.1.1 because of wifi issues and battery drain. It seems like Samsung pulled the 4.1.2 update because OTA no longer finds it. Maybe that's an indication that they're working on it, fingers crossed.
Sent from my GT-N7100 using xda app-developers app
Click to expand...
Click to collapse
Did they really pulled off the 4.1.2 update?
Good to know. This update was really bad. I had to do a wipe data/factory reset because even the vertical scroll was laggy.
And the battery is a lot worse.

Yes its true. I have also been having the same issue. D scrolling problem along with quite a lot of battery drain. Just bought my device a week or two back. Worked flawlessly in the first few days but with the latest update has reduced the battery life quite a lot. Hope Samsung resolves it soon.
Sent from my GT-N7100 using xda premium

Been having the same weird battery drain issues. My battery's charging rate has gone down to 10% per hour whereas it was more than double that earlier.
Now am in a dilemma as to whether go back to 4.1.1 or wait for samsung to fix their mess
Sent from my GT-N7100.
Those who help noobs go to heaven. True story.

I have no Issues after a hard reset.
I have 4.1.2 JZO54K.N7100XXDLL7 bb N7100XXDLK7 French Unbranded baseband compilation 3.031-679347 .
Previous the hard reset was a plethora of bugs also free space began to decrease with no reason until the system was close to unusable. Then I decided to do the hard reset, after that now works very stable and battery easy last all day.
Sent from my GT-N7100 using xda premium

Sent from my GT-N7100 using xda premium

I my note 2 is not rooted, no special tweeks neither power saving enabled .
Sent from my GT-N7100 using xda premium

Does your wifi stop responding after phone goes into sleep? Maybe we have different hardware because mine would do that.
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Damn, so that's what's going on. I've been going crazy at why my standby time went from 0.8% / hour to 1.6-6% / hour after the update. The drain is certainly noticeable and I hope this gets fixed soon.

is the DLL3 better than DLL7 as mine seems rock solid battery got the WanamLite running on mine

Dunno between 4.1.1 and 4.1.2 but I found ll7 better than ll5 for battery life.

I had huge idle battery drain after OTA update to 4.1.2 - about 2-3% every hour. I was loosing almost 20% battery over night with everything turned off. I did a factory reset and it seems back to normal now. It's probably a bit worse then 4.1.1 but I'm still getting 2-3 days with moderate use. Now it's draining 2% over whole night instead of 2% every hour.

I think I found out why my phone drain is so bad. It doesn't go to sleep.
I noticed this since yesterday. I woke up did a restart.. and look! It still doesn't go to sleep!
Sent from my GT-N7100

I too had the battery drain and no deep sleep, sine I have installed the note2core kernel (version 2.4 i think) and oc'd to 1.8ghz and the phone lasts days. No real need for the oc but it is stable and I have encountered no problems.
Added screen shot
This is with over 4 hours screen on time
Sent from my Nexus 7 using Tapatalk HD

i have good battery life, but the only problem is the phone always restart and shut down by itself.
anyone facing the same problem as well?
thanks.

Same here after the update battery life is terrible for me .before the update it was rock solid and use to wonder if at all does this battery ever drain .
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I switched from French DLL7 to the more recent release from the Netherlands, seems significantly better thus far.
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Battery life gone down the drain after firmware upgrade

Hi guys,
A couple of weeks ago, Note II informed me of an upgrade. I did a bit of googling and found out it was to fix some exonys bug. Seemed pretty important so I did the upgrade post haste.
At first the battery life was atrocious (like a 50% drop). The same thing happened with my old iPhone 4 but everything reverted to normal within a week. So, I though maybe things are new and Android will fix itself up after some time.
How wrong was I ? LOL. My phone gives me just a day's worth of battery life. Earlier it was a solid two days. Which was why I justified carrying this brick of a phone. It is pretty ridiculous to see the battery drop by 30% at times in three or four hours (despite zero use).
Any suggestions to improve or remove the pathetic firmware upgrade.
1. Use the nova launcer
2. Auto brightness with the slider dragged to 1/3rd
3. 3G always on
4. The battery screen shows screen taking 70% of the battery! I have the auto off timer set to 15s the minimum.
Any suggestions guys? I am frustrated with this phone post the update. Thinking of switching back to the iPhone as atleast it gave me a day's pf juice in a much pocketable format.:crying:

longgamma said:
Hi guys,
A couple of weeks ago, Note II informed me of an upgrade. I did a bit of googling and found out it was to fix some exonys bug. Seemed pretty important so I did the upgrade post haste.
At first the battery life was atrocious (like a 50% drop). The same thing happened with my old iPhone 4 but everything reverted to normal within a week. So, I though maybe things are new and Android will fix itself up after some time.
How wrong was I ? LOL. My phone gives me just a day's worth of battery life. Earlier it was a solid two days. Which was why I justified carrying this brick of a phone. It is pretty ridiculous to see the battery drop by 30% at times in three or four hours (despite zero use).
Any suggestions to improve or remove the pathetic firmware upgrade.
1. Use the nova launcer
2. Auto brightness with the slider dragged to 1/3rd
3. 3G always on
4. The battery screen shows screen taking 70% of the battery! I have the auto off timer set to 15s the minimum.
Any suggestions guys? I am frustrated with this phone post the update. Thinking of switching back to the iPhone as atleast it gave me a day's pf juice in a much pocketable format.:crying:
Click to expand...
Click to collapse
Isn't anything wakelocking your device?
Sent from my GT-N7100 using xda premium

rodrigoyasuda said:
Isn't anything wakelocking your device?
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Click to expand...
Click to collapse
The wakelock business, sounds disturbing; Found an old thread.
http://forum.xda-developers.com/showthread.php?t=1827676
I am a very simple user, I did not install any applications (just transferred some music and installed Super Hexagon)after the firmware upgrade.
Could a firmware upgrade cause this much drastic drop in battery life?
Thanks,
longgamma

There is a known battery drain issue with 4.1.2. What firmware did you update too?
http://www.siliconbuzzard.com/2013/01/battery-drain-issue-of-galaxy-note-2-jb.html

roligov said:
There is a known battery drain issue with 4.1.2. What firmware did you update too?
http://www.siliconbuzzard.com/2013/01/battery-drain-issue-of-galaxy-note-2-jb.html
Click to expand...
Click to collapse
Yes, but that battery drain issue was only in the first 4.1.2 release, the latest one does not have this issue.
Sent from my GT-N7100 using xda premium

Yes, I got the 4.1.2 upgrade which has played havoc with the battery life.
But the drop has been extreme in my case.
Sent from my GT-N7100 using xda app-developers app

Honestly you can't do anything. In American english, you can't do nothing!
Turn 3G off, when you don't need it. Keep brightness at as low as possible.
That's all. 4.1.2 drains juice faster than 4.1.1, it's the truth, doesn't really matter if someone agrees or not.
You could go back to 4.1.1 ROM you know and depend on your luck for that Exynos issue. Otherwise give up on great battery backup and stay with 4.1.2, like I'm doing. Nowadays I don't even monitor how much battery backup/screen on time I'm getting, on 4.1.1 it was the opposite story however.

Hey, so should I just resign myself to a gimped battery? What really hurts is how awesome the battery was before.
Any word on when samsung would release a good update?
Sent from my GT-N7100 using xda app-developers app

Download better battery stats to make sure there is no wake lock. I will advise despite my best efforts the battery life has plummeted when upgrading to 4.1.2. Stick to 4.1.1 for battery life. It still lasts much longer than an average handset saying that
Sent from my GT-N7100 using xda app-developers app

longgamma said:
Hi guys,
A couple of weeks ago, Note II informed me of an upgrade. I did a bit of googling and found out it was to fix some exonys bug. Seemed pretty important so I did the upgrade post haste.
At first the battery life was atrocious (like a 50% drop). The same thing happened with my old iPhone 4 but everything reverted to normal within a week. So, I though maybe things are new and Android will fix itself up after some time.
How wrong was I ? LOL. My phone gives me just a day's worth of battery life. Earlier it was a solid two days. Which was why I justified carrying this brick of a phone. It is pretty ridiculous to see the battery drop by 30% at times in three or four hours (despite zero use).
Any suggestions to improve or remove the pathetic firmware upgrade.
1. Use the nova launcer
2. Auto brightness with the slider dragged to 1/3rd
3. 3G always on
4. The battery screen shows screen taking 70% of the battery! I have the auto off timer set to 15s the minimum.
Any suggestions guys? I am frustrated with this phone post the update. Thinking of switching back to the iPhone as atleast it gave me a day's pf juice in a much pocketable format.:crying:
Click to expand...
Click to collapse
After updating to 4.1.2 my battery runs down about 20% quicker overall I would say. 70% for your screen seems severe. Mine is always set to 50% auto and takes between 30 to 35% of the battery usage.
Sent from my GT-N7100 using Tapatalk 2

How many hours u getting and hiw many hiurs screen in time?
Sent from my GT-N7100 using xda premium

If you go back to 4.1.1.... Stock even....you'll have the same battery issue.

After about 2 weeks of having the 4.1.2 (the second update I received) on DBT my battery life one day just magically got better! I had been having terrible battery life (like 1 days worth) for 3 months, and now I get home every day from work with 50-70% battery. I charge it every night, regardless of the %. But it just magically got better. I'd say give it a go for a week or 2, and see if it helps. I don't know what happened with mine, but it looks like the software just "settled in" because I didn't install ANYTHING new, and in fact, I hadn't even uninstalled anything! It just got better after using it. Do a few battery pulls / restarts, too.

I went back to 4.1.2 last night and right now I'm at 50% charge, 17 hours standby time and 5 hours of screen time... I'd say my battery issue is fixed.. for now lol

I also must say that after a week or so of using 4.1.2 battery went much better overnight. I automatically turn on airplane mode during night, and on 4.1.1 I had like 1-2% drain overnight from full charge. After updrage to 4.1.2 it jumped to 10-20% !!! Now, it is down to like 4%, which is not that bad. Still have to see how it behaves during the day, I think it is not any better. Well, at least that standby drain is (much) better....

daz_2000 said:
How many hours u getting and hiw many hiurs screen in time?
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
I get about 4.5 hours on average, and was getting about 5.5 before the update.
Sent from my GT-N7100 using Tapatalk 2

49 % down and screen has taken up 57 % with a display time of just 1 hour 18 minutes!
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longgamma said:
49 % down and screen has taken up 57 % with a display time of just 1 hour 18 minutes!
Sent from my GT-N7100 using xda app-developers app
Click to expand...
Click to collapse
I hear that a factory reset helps in some cases.
Sent from my GT-N7100 using Tapatalk 2

I decided to dirty flash 4.1.2 and it worked great for me. We'll see how it goes after a week or so of use though
A thanks is always appreciated if I helped you.
Edit: After 50% battery drain in 8 hours of light/moderate use on wifi I'm going back to 4.1.1... I see no benefit of using 4.1.2.... The reason I bought my note 2 was to have a battery that will last me all day and this isn't cutting it.
Thank you MobileOdin for making this easy!!!

This is windows os right? Things not going fine, reinstall from scratch,!
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s2 in jb 4.1.2 battery life

hi. I am o supernexus build 5 wth siyah kernel. I got round 7 hiurs if heavy usage on gs2. I've done facebook, viber, internet using stock browser and downloading around 200mb zip file. what can you say about this battery life. its my first time to use gs2 and I am using 2000mah. the battery life seems pretty bad in my opinion. I will attach screenshot of my hardware info, battery use and screen time. hoping for any opinions out there
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I think is good , for me with stock battery (1650mah) i get 3 hours and 30-40 minutes (screen on time), wifi on , screen brightness auto
Send from my SGS2 I9100 with HassanROM and latest DorimanX 8.xx kernel

I think the battery life should be better with a 2000mah battery..
Is the battery properly callibrated??

krazy1101 said:
I think is good , for me with stock battery (1650mah) i get 3 hours and 30-40 minutes (screen on time), wifi on , screen brightness auto
Send from my SGS2 I9100 with HassanROM and latest DorimanX 8.xx kernel
Click to expand...
Click to collapse
oh really that means I should be getting better because I am on 2000mah but it seems not. Im not sure what's the problem if its the battery or the kernel. I also used an ICS firmware from Samsung I9100TDULP4. I don't know if that affects the battery life
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peRFect! said:
I think the battery life should be better with a 2000mah battery..
Is the battery properly callibrated??
Click to expand...
Click to collapse
Well I dont know if it is properly calibrated. By the way I got this unit from my uncle so I am not really sure if the battery is still good. How do we know if its still good. I dont know how old is this battery. How do we calibrate the battery and does the room affect this battery life?
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by the way I just installed this rom A week ago. The battery takes 3-4 hours to be charged using my xperia charger
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I have suggestion for you , go to miuiandroid.com and download the latest build , install Siyah Kernel v6.0b5 with that and you will love the battery timing on that (Trust me, i am using it right now)

Mr.KiLLeR said:
I have suggestion for you , go to miuiandroid.com and download the latest build , install Siyah Kernel v6.0b5 with that and you will love the battery timing on that (Trust me, i am using it right now)
Click to expand...
Click to collapse
you mean downloading the miui rom? yeah definitely I'll give it a try after slimbean which I will try if I see no improvement on the bAttery. Has anyone had 2000mah and siyah kernel with supernexus rom build 5? What are your timings?
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infinitylook said:
you mean downloading the miui rom? yeah definitely I'll give it a try after slimbean which I will try if I see no improvement on the bAttery. Has anyone had 2000mah and siyah kernel with supernexus rom build 5? What are your timings?
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
I have tried Slim Bean too and after trying that i came to Miui Rom

anyone who have experience with 2000battery
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anyone who have experience with 2000battery
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right now I am using the original 1650 mah stock battery of s2. I've been doing a lot of file transfers as of this moment via e.s. file explorer and currently I am transferring almost 13gb of data via wifi from my laptop. its been awake for 4 hours now with screen time of 1 hour and 30min. e.s. file explorer is keeping the system awake for 3 hours. I did some facebook and viber chats. screen at 35% brightness.. do you think this is the expected life of the stock battery? I am fairly new to samsung and I found the battery life to be disappointing even with the stock jelly bean rom from samsung. I will post some pics of the battery stats and cpu stats from cpu spy. another thing though. is there a good app from the market where I can test my two batteries and compare them? thank you
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infinitylook said:
right now I am using the original 1650 mah stock battery of s2. I've been doing a lot of file transfers as of this moment via e.s. file explorer and currently I am transferring almost 13gb of data via wifi from my laptop. its been awake for 4 hours now with screen time of 1 hour and 30min. e.s. file explorer is keeping the system awake for 3 hours. I did some facebook and viber chats. screen at 35% brightness.. do you think this is the expected life of the stock battery? I am fairly new to samsung and I found the battery life to be disappointing even with the stock jelly bean rom from samsung. I will post some pics of the battery stats and cpu stats from cpu spy. another thing though. is there a good app from the market where I can test my two batteries and compare them? thank you
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
To callibrate battery..first completely drain the battery to about 5%, then charge the phone non stop without disturbing it till 100% and immediately remove the charger..again fully drain the battery and follow the above steps and u will get better battery life after a few cycles!
About roms..battery life does differ from rom to rom...i suggest u could check the custom kernels packed with zzmoove governor, ithat particular governor definitely improves the battery backup!
And in the above post es file explorer is eating ur battery..for that u should download greenify and hibernate apps continuously running in background!

great. I will follow your steps. one more thing. how can I know if the battery is still good or if its still holding the proper charge its suppose to have? thanks
Sent from my GT-I9100 using xda app-developers app

best I can get is about 3 days standby in jb stock.

I use the 2000mAh battery is primary battery.. no big surprise to expect here, capacity is just 21% more by construction...
With wifi on, JB burns in my case about 3% in IDLE.. stock kernel.. and about 5% in 3G mode, IDLE.. then battery drains more or less fast depending on screen on, phone calls etc. I use the phone extensively for work (email sync & replies, phone calls, sms and voip) and i have to topup the battery twice or trice a day!
Have tried various custom kernels with all sort of magic to reduce battery drain.. more or less effectively.. sometimes with less stability.
Right now trying out latest dorimanx 8.27.. seems thatn IDLE with WIFI on drains around 2% per hour.. better than stock.. still not quite awesome
I miss the GB battery life.. but JB is so beautiful in comparison, I cannot go back!

jmarcnms said:
I use the 2000mAh battery is primary battery.. no big surprise to expect here, capacity is just 21% more by construction...
With wifi on, JB burns in my case about 3% in IDLE.. stock kernel.. and about 5% in 3G mode, IDLE.. then battery drains more or less fast depending on screen on, phone calls etc. I use the phone extensively for work (email sync & replies, phone calls, sms and voip) and i have to topup the battery twice or trice a day!
Have tried various custom kernels with all sort of magic to reduce battery drain.. more or less effectively.. sometimes with less stability.
Right now trying out latest dorimanx 8.27.. seems thatn IDLE with WIFI on drains around 2% per hour.. better than stock.. still not quite awesome
I miss the GB battery life.. but JB is so beautiful in comparison, I cannot go back!
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Does Jb stock for you has better life or does custom rom have more? I really like the custom roms but as per observation stock rom offers more battery time. Right now I just reverted to stock rom i9100xwlss. Touchwiz really sucks. Supernexus is really beautiful but offers less battery (but I will have to try yet their latest build). Also one of the reasons for going back to stock is the camera shot quality. Custom roms really have poor camera quality. I guess when it comes to lowlight shots the stock roms are best. So much for that. Does stock rom offer more battry for you or custom rom does?
Sent from my GT-I9100 using xda app-developers app

SGS2 Battery Life on 4.1.2
infinitylook said:
hi. I am o supernexus build 5 wth siyah kernel. I got round 7 hiurs if heavy usage on gs2. I've done facebook, viber, internet using stock browser and downloading around 200mb zip file. what can you say about this battery life. its my first time to use gs2 and I am using 2000mah. the battery life seems pretty bad in my opinion. I will attach screenshot of my hardware info, battery use and screen time. hoping for any opinions out there
Sent from my GT-I9100 using xda app-developers app
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Below is a reply in some other forum by Samsung offcials regarding a specific method to Hard-Reboot your phone after a Firmware update: This method particularly helped me improve the battery life on SGS2 after 4.1.2 update.
"1. I’m sorry you are having issues with your device after upgrading the firmware. I can understand your frustration about this.
Old systems settings can be left on the phone after an update occurs, which is why we usually recommend a full factory reset after updating. If this isn’t done your device may begin to give false readings from system resources, or experience technical problems, which may explain the issue you are having.
We would advise on doing the following, which is designed to reset the settings on your device. Please back up your device using Samsung KIES before you do this.
1) Remove the battery for at least 40 minutes, put the battery back in and allow it to fully discharge. Afterwards, perform a full battery charge with the device turned off. Do not interrupt the charging process.
2) After the battery is fully charged, we would like you to perform a full factory reset, which can be done via Settings > Backup > Reset.
This process will reset your device, remove old system files that are no longer needed and enable your device to operate normally again.
Please let us know if your device continues to experience problems after the reset so we can investigate further.
If you require any further assistance, please contact Samsung again and we will be more than happy to help.
Kind regards,
Stewart
Online Support Team
SAMSUNG Customer Support Centre

infinitylook said:
Does Jb stock for you has better life or does custom rom have more? I really like the custom roms but as per observation stock rom offers more battery time. Right now I just reverted to stock rom i9100xwlss. Touchwiz really sucks. Supernexus is really beautiful but offers less battery (but I will have to try yet their latest build). Also one of the reasons for going back to stock is the camera shot quality. Custom roms really have poor camera quality. I guess when it comes to lowlight shots the stock roms are best. So much for that. Does stock rom offer more battry for you or custom rom does?
Sent from my GT-I9100 using xda app-developers app
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Actually I only use stock JB.. and trying to get it last longer with some custom kernels.. recently trying snapdragon rom, which is stock JB as well but with some S4 apk made compatible with S2... tried some time back omega, vanila rootbox and some other android builds for s2.. but was facing few stability issues / bugs and also missed some features that i was getting from stock rom.. so i gave up with these... now just aiming at stability and if possible battery endurance.. but not at the cost of stability.