[Q] Battery problem since downgraded to 4.1.2 - Nexus 7 Q&A, Help & Troubleshooting

Hello everyone, ever since i downgraded my nexus 7 to 4.1.2 i have been experiencing battery problems such as fast discharging, not charging or charging very little when powered off. I never had this problem when i was on 4.1.2 before updating from 4.1.2 > 4.2 > 4.2.1 > '4.1.2'(battery problem introduced)
I have flashed Clemsynextremebatterysaver kernel but my battery still drains too quickly.
Any help is greatly appreciated.
BTW i dont want to upgrade to 4.2.x again because it s*cks.

still no response......

You're on your own.
4.2.2 is doing great for me. Battery life is amazing like the first day I bought it.
Hardly anyone is on 4.1.2 anymore.
I suggest you flash back to 4.2.2 and try all the kernels there are available and see which one is better for you. For me, I love Franco's kernel and Stock kernel. (Yes, I said stock.) If you're playing lots of games and viewing HD videos then your battery life will deplete quickly. So the longevity of the battery life depends on the task you do on the device. You may have a poor quality battery or whatever.
Sent from my Nexus 4 using Tapatalk 2

scream4cheese said:
You're on your own.
4.2.2 is doing great for me. Battery life is amazing like the first day I bought it.
Hardly anyone is on 4.1.2 anymore.
I suggest you flash back to 4.2.2 and try all the kernels there are available and see which one is better for you. For me, I love Franco's kernel and Stock kernel. (Yes, I said stock.) If you're playing lots of games and viewing HD videos then your battery life will deplete quickly. So the longevity of the battery life depends on the task you do on the device. You may have a poor quality battery or whatever.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
the reason i flashed 4.1.2 is because i can stream HD games from my flash drive.having a 8gb nexus 7, i often lack storage space...in 4.2.2 it is impossible to stream games from usb...i am going to try out different kernels to see how it turns out....thanks BTW

If i flash a custom ROM will this problem go away???
i have read somewhere that a factory reset could solve the problem...should i give it a go??

Related

Best battery life JB rom

Guys, as I am truly annoyed by the fact stock JB is draining like hell, I would like to know the best rom available now. If any of you have good experience with a particular rom let me know
Sent from my Nexus S using xda app-developers app
Try Adam's ROM I'm getting similar battery life as in ics
Sent from my Nexus S using Tapatalk 2
It's most likely not a ROM issue. I tried Adams and CM10 and had similar battery life. Make sure you turn off google now (just the cards that need to know your location constantly). It might also be that your update didn't go that well, so you might try a factory reset. It could also be a misbehaving app, so when you do a factory reset, maybe test the ROM before restoring/reinstalling your apps. Also, the more information you give us the better we can help. Good luck!
Aktifit said:
It's most likely not a ROM issue. I tried Adams and CM10 and had similar battery life. Make sure you turn off google now (just the cards that need to know your location constantly). It might also be that your update didn't go that well, so you might try a factory reset. It could also be a misbehaving app, so when you do a factory reset, maybe test the ROM before restoring/reinstalling your apps. Also, the more information you give us the better we can help. Good luck!
Click to expand...
Click to collapse
Thanks for the info. I installed the stock factory image 4.0.4 and then waited for the official OTA. I updated and all works well, but I get around 15 hrs on a full charge with some Whatsapp and Facebook use. When I use it more intense with more screentime the battery drains the most. I think a factory reset wont give me more battery life then this, but I know my drain was not so big while I was on ICS.
By the way, which one is the most stable; CW10 (That chocolate river one??) or Jellybelly?
lowtje said:
Thanks for the info. I installed the stock factory image 4.0.4 and then waited for the official OTA. I updated and all works well, but I get around 15 hrs on a full charge with some Whatsapp and Facebook use. When I use it more intense with more screentime the battery drains the most. I think a factory reset wont give me more battery life then this, but I know my drain was not so big while I was on ICS.
Click to expand...
Click to collapse
Sounds weird. But also keep in mind that there are still some apps that don't cope very well with JB, and Facebook has never been Androids best friend . But it doesn't make sense that it's only during screen on, most people report issues related to google now and apps doing **** in the background. If you want to switch ROM anyways, I suggest you use Adams Jellybelly, it's mostly stock (less features means less that can go wrong) and it includes thalamus kernel, which is IMHO the best JB kernel at the moment. I do not recommend any CM10 based ROMs if you're after stability. I assume you checked your battery stats and didn't find anything?
Edit: Chocolate river was abandoned when official OTA came afaik, so definitely Jellybelly . Make sure you do a full wipe though, if something's wrong dirty flashing isn't worth it.
Aktifit said:
Sounds weird. But also keep in mind that there are still some apps that don't cope very well with JB, and Facebook has never been Androids best friend . But it doesn't make sense that it's only during screen on, most people report issues related to google now and apps doing **** in the background. If you want to switch ROM anyways, I suggest you use Adams Jellybelly, it's mostly stock (less features means less that can go wrong) and it includes thalamus kernel, which is IMHO the best JB kernel at the moment. I do not recommend any CM10 based ROMs if you're after stability. I assume you checked your battery stats and didn't find anything?
Edit: Chocolate river was abandoned when official OTA came afaik, so definitely Jellybelly . Make sure you do a full wipe though, if something's wrong dirty flashing isn't worth it.
Click to expand...
Click to collapse
Sounds good to me. Downloading Jellybelly now. I checked my battery stats and didn't find anywhing weird. I dont have much apps installed so there is not much that could give issues. When I leave my screen off (at night or while working) the battery life is not that bad. It's weird, but JB is still very fresh and new, so I'll just try some other roms =)
Agreed jelly belly provides the best performance, stability, and battery life
Sent from my Nexus S using Tapatalk 2
Now running JellyBelly and its much faster then my stock JB
Sent from my Nexus S using xda app-developers app
also for me battery life was improved in jb
Wouldn't agree that jellybelly provides best performance and battery. I suggest trying out cm10 v1.2
Sent from my Nexus S using xda premium
I am currently on JellyBelly and the battery life is definitely not better than stock for me. Battery drains like crazy when idling.
BUT, I do have Google Now activated. So really make sure to deactivate if you do not need it.
IMO all ROMs should give similar battery life.
Apolyxon said:
I am currently on JellyBelly and the battery life is definitely not better than stock for me. Battery drains like crazy when idling.
BUT, I do have Google Now activated. So really make sure to deactivate if you do not need it.
Click to expand...
Click to collapse
Even with Google now turned on the battery should last some time. Do You get the same time as with ICS when it's deactivated? If not, something's borked .
Even if the battery life isnthe same with Jellybelly, the performance is great!
Sent from my iPad using Tapatalk HD
after a few days weith stock jb i reach 3h45 / 4 h of screen use
with ics stock i never reached 3 h!
nexususer1 said:
Wouldn't agree that jellybelly provides best performance and battery. I suggest trying out cm10 v1.2
Sent from my Nexus S using xda premium
Click to expand...
Click to collapse
Link to v1.2?
ironia. said:
after a few days weith stock jb i reach 3h45 / 4 h of screen use
with ics stock i never reached 3 h!
Click to expand...
Click to collapse
Really? That's what I was getting that on ICS. Haha. Well that's an improvement for you!
I got 5 hours on time with jelly belly WiFi almost always on
Sent from my Nexus S using Tapatalk 2
kwibis said:
Link to v1.2?
Click to expand...
Click to collapse
https://plus.google.com/u/0/111722836277981844223/posts/C8Ykk6Fvu3t
For some reason Kalin is posting new versions of CM10 on G+ now

Battery life absolute trash?

So my N7 arrived two days ago, and I immediately unlocked, rooted, and flashed some things. Currently running Codename Android with Trinity Kernel.
My battery is absolute crap now though. Its been two days so I thought the battery more but have settled by now. All auto sync off, brightness at lowest setting, apps sync every 4 hours, still bad! Does calibrating still work? I read somewhere that it was debunked and it didn't work. I would appreciate any help. I mean, my Maxx is getting better battery life.
I uploaded some screenshots of the battery after only 1 and a half hours.
Sent from my Nexus 7 using Tapatalk 2
dafuq?
My Battery life is without doing nothing ~1-2weeks (in my with 58% xD)
Use Stock Kernel
renes2 said:
dafuq?
My Battery life is without doing nothing ~1-2weeks (in my with 58% xD)
Use Stock Kernel
Click to expand...
Click to collapse
Where can I find that to flash it?
Sent from my Nexus 7 using Tapatalk 2
Aliceics said:
Where can I find that to flash it?
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
Go to the motley kernel thread in Original Development. He provides a mirror link for the stock kernel
I loved Trinity and the TKT app but for some reason im getting much better battery life with motley kernel. I originally did some troubleshooting and fixed some apps that were causing wakelocks. My battery life got a little better but not by enough (could only get 3 or 4 hrs screen on) so i switched kernels.
If you feel like experimenting do this:
Nandroid
Wipe Cache + Dalvik
Wipe System
Factory Reset
Flash CM10 nightly (any rom of your choice)
Flash GApps
Flash motley kernel (i used the 484 GPU version)
Fix permissions
Reboot
I get awesome battery life now and performance is great.
Your title should be something like this: "After rooting and installing battery draining rom and kernel I get bad battery life on my N7"
Stock JB and kernel should yield decent batter life.
With the proper rom and kernel the Nexus 7 easily match or better the googles battery life claim.
FYI the latest Trinity kernel is a battery hog.
noobandriod said:
FYI the latest Trinity kernel is a battery hog.
Click to expand...
Click to collapse
if you use it at 1.7ghz it will be, but thats obvious. at 1150mhz, its as quick and wonderful on batteries.
simms22 said:
if you use it at 1.7ghz it will be, but thats obvious. at 1150mhz, its as quick and wonderful on batteries.
Click to expand...
Click to collapse
I wouldnt go as far as saying its a battery hog, but i ran the kernel at stock clocks and while performance was much better than stock i still had tons of drain that i now dont have with a different kernel.
Ran Trinity kernel at 1150mhz and had awful battery. Back on stock ROM and kernel and seems to have improved a lot.
Sent from my Nexus 7 using xda app-developers app
I feel like the battery is pretty decent...
Get off those custom Roms and kernels until you understand how the device is meant to perform.
You appear to have 87% after 1.5 hours, that equals about 10 hours, how is that bad? I get about 8 hours if I am intensely playing with screens, apps and games, 2 days if I'm not doing much. Loses 2% at night with wifi off. No root.
trinity kernel and the pure aosp rom, at 1150mhz. id say not bad at all..
Trinity Kernel is a good kernel. I went overboard by saying it was a battery hog. I did have it overclocked up to 1500hz on-demand and it ate up battery faster then I would like. But this is with the newest one, a few of the older ones worked out better for me though.
noobandriod said:
Trinity Kernel is a good kernel. I went overboard by saying it was a battery hog. I did have it overclocked up to 1500hz on-demand and it ate up battery faster then I would like. But this is with the newest one, a few of the older ones worked out better for me though.
Click to expand...
Click to collapse
yea, overclocking is mostly for fun, definitely not for battery life
640k said:
Get off those custom Roms and kernels until you understand how the device is meant to perform.
Click to expand...
Click to collapse
I have some problems with *wakelock*

Using custom kernel with stock ROM?

So I got a Nexus 4 last week, and I couldn't be happier. Coming from the Galaxy Nexus, this phone is essentially everything I loved about the Samsung, but on steroids. I was a HUGE crack-flasher with my Samsung, but the fluidity of the stock Nexus 4 is impeccable. Which brings me to my question --
I'm getting around 3.5 hours screen on time if only on HSPA+, and 4.5 hours if on mostly WiFi. Would the battery life be improved significantly if I flashed, say, Franco's Milestone-2? Or is it generally not a big difference if you flash a custom kernel on a stock ROM?
Sent from my Nexus 4 using Tapatalk 4 Beta
Lyxdeslic said:
So I got a Nexus 4 last week, and I couldn't be happier. Coming from the Galaxy Nexus, this phone is essentially everything I loved about the Samsung, but on steroids. I was a HUGE crack-flasher with my Samsung, but the fluidity of the stock Nexus 4 is impeccable. Which brings me to my question --
I'm getting around 3.5 hours screen on time if only on HSPA+, and 4.5 hours if on mostly WiFi. Would the battery life be improved significantly if I flashed, say, Franco's Milestone-2? Or is it generally not a big difference if you flash a custom kernel on a stock ROM?
Sent from my Nexus 4 using Tapatalk 4 Beta
Click to expand...
Click to collapse
It depends on your usage. Personally I get the same amount of screen time on a custom ROM or on stock ROM with Franco.kernel. You also have to manage your apps according as well and having a good signal is an important to a longer battery life as well. Doing light tasks will increase screen time as well. Gaming will deplete the battery by a lot. So it really just depends on your usage.
Sent from my Nexus 4 using Tapatalk 2
scream4cheese said:
It depends on your usage. Personally I get the same amount of screen time on a custom ROM or on stock ROM with Franco.kernel. You also have to manage your apps according as well and having a good signal is an important to a longer battery life as well. Doing light tasks will increase screen time as well. Gaming will deplete the battery by a lot. So it really just depends on your usage.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
I appreciate the response. Question for you: does fluidity remain just as beautifully magnificent if using Franco's?
Sent from my Nexus 4 using Tapatalk 4 Beta
stock with franco is my current set up. i ALWAYS end up going back to stock because i find it alot more fluid out of the box state than any custom rom.
battery life for me theres a marginal bump up. but i keep the kernel as is no tweaking besides color calibration.
and of course that part depends on many variables in your particular situation. apps,managing apps, how much you use the phone etc.
i am no app hoarder just the basic essential apps that get my through the day.
i can honestly say this is my perfect set up for my N4. Stock with root and francos nightly kernel color tweaked
paul_viado said:
stock with franco is my current set up. i ALWAYS end up going back to stock because i find it alot more fluid out of the box state than any custom rom.
battery life for me theres a marginal bump up. but i keep the kernel as is no tweaking besides color calibration.
and of course that part depends on many variables in your particular situation. apps,managing apps, how much you use the phone etc.
i am no app hoarder just the basic essential apps that get my through the day.
i can honestly say this is my perfect set up for my N4. Stock with root and francos nightly kernel color tweaked
Click to expand...
Click to collapse
And you've noticed improved battery life, personally?
Sent from my Nexus 4 using Tapatalk 4 Beta
Lyxdeslic said:
And you've noticed improved battery life, personally?
Sent from my Nexus 4 using Tapatalk 4 Beta
Click to expand...
Click to collapse
yes i notice a difference in my battery life. nothing big but i can tell you theres a difference and every little ounce of juice helps im the type of person who always reups over night and im usually at around 35% by 10pm after a full day of use
I prefer bricked (note my signature) but Franco's is nice, probably the most popular one out there for either N4 or N7.
help ?
Sorry if this is a bit out of context, but Since I have less than 10 posts, I am unable to comment on the most suitable thread. Searched Q&A and other threads as suggested, found conflicting replies.
My problem: Flashed stock ROM on my Nexus 4,(jwr66y) but am unable to move past the boot screen ("android") while flashing franco's kernel for nexus 4 OSAP from franco's thread regarding the same.
Tried the boot image from franco's post as well as the boot image from the occam jwr66y post. Does not move past the boot screen. Help?!
Rainmaker89 said:
Sorry if this is a bit out of context, but Since I have less than 10 posts, I am unable to comment on the most suitable thread. Searched Q&A and other threads as suggested, found conflicting replies.
My problem: Flashed stock ROM on my Nexus 4,(jwr66y) but am unable to move past the boot screen ("android") while flashing franco's kernel for nexus 4 OSAP from franco's thread regarding the same.
Tried the boot image from franco's post as well as the boot image from the occam jwr66y post. Does not move past the boot screen. Help?!
Click to expand...
Click to collapse
Clear the caches in recovery and reboot.
Lyxdeslic said:
So I got a Nexus 4 last week, and I couldn't be happier. Coming from the Galaxy Nexus, this phone is essentially everything I loved about the Samsung, but on steroids. I was a HUGE crack-flasher with my Samsung, but the fluidity of the stock Nexus 4 is impeccable. Which brings me to my question --
I'm getting around 3.5 hours screen on time if only on HSPA+, and 4.5 hours if on mostly WiFi. Would the battery life be improved significantly if I flashed, say, Franco's Milestone-2? Or is it generally not a big difference if you flash a custom kernel on a stock ROM?
Sent from my Nexus 4 using Tapatalk 4 Beta
Click to expand...
Click to collapse
Offtopic:
"Galaxy Nexus but on steroids." well said my friend!
Sent from my Nexus 4 using xda app-developers app
gee2012 said:
Clear the caches in recovery and reboot.
Click to expand...
Click to collapse
Did that before flashing anyway. And after restoring stock system.img and several times in between.. dalvik and cache both.
Might have to download a toolkit to install it.. Don't know if it will make a difference or not
Tried the milestone boot.img also. Does not even move past "Google" in this case..

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
Sent from my GT-I9100 using xda app-developers app
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
Sent from my GT-I9100 using xda app-developers app
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?
Sent from my GT-I9100 using xda app-developers app
by the way I just installed this rom A week ago. The battery takes 3-4 hours to be charged using my xperia charger
Sent from my GT-I9100 using xda app-developers app
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?
Sent from my GT-I9100 using xda app-developers app
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
Sent from my GT-I9100 using xda app-developers app
anyone who have experience with 2000battery
Sent from my GT-I9100 using xda app-developers app
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
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!
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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.

Battery life stock vs cm10.1

Hi guy, which is better between stock or cm10.1 for battery life if it used the exact same way ? i mean the exact same app and the exact same sync configuration ... things like that ?
You could try and tell us
Personally i haven't tried CM
Sent from Holy Terra on a paranoid nexus 4
CM uses the same kernel as stock, So I don't think there'll be any difference in battery life.
Battery life is more a matter of user and device then kernel. We could run the same rom, same kernel and see very different battery life due to apps installed, set up, and how we use the device. This is a common known fact.

Categories

Resources