Database Users

Terrible battery life

I'm on joelz prime xl 3D r43 and my battery life is horrible. I get and hour everyday and barley using it. When I stare at my battery percentage I can see it goin down ever minute.
Can someone give me tips on how to save battery life or something
Bcuz when I flash Jermains stock its Rom battery life is good again (I get about 3 hours on that)
And there's nothing wrong with my battery or phone
Sent from my HTC Droid Incredible using xda premium

Alton (Halo 2) said:
I'm on joelz prime xl 3D r43 and my battery life is horrible. I get and hour everyday and barley using it. When I stare at my battery percentage I can see it goin down ever minute.
Can someone give me tips on how to save battery life or something
Bcuz when I flash Jermains stock its Rom battery life is good again (I get about 3 hours on that)
And there's nothing wrong with my battery or phone
Sent from my HTC Droid Incredible using xda premium
Click to expand...
Click to collapse
Have you ever dropped your phone in water at all? Maybe you have a bad battery, because those battery stats are worse than even running complete stock. Post all of your info, Hboot, radio, kernel, etc. And hopefully we can help you out with your issue.

Hboot: .92
Kernel: Tinys gingersense 11/19
Radio : 2.15.00.0808
And no never dropped it in water
Sent from my HTC Droid Incredible using xda premium

that sounds unreasonably bad. I'm on Joelz Prime, too, but I think only up to R40. I doubt there's anything in those last few commits to cause this, though. Try re-flashing, wiping battery stats, and give it a few cycles then reevaluate things. What apps are shown in the "Battery Use" settings menu?
Failing that, could be some hardware issue causing a short or something that's draining things... There have been cases where water or other damage can kill the battery life. Good luck.

I reflashed 3 times and still horrible battery life .
Water never got on my phone .
And in battery use nothing major is running . Except like display, os ect.
Sent from my HTC Droid Incredible using xda premium

real strange, man... you know anybody else with an Incredible or Evo whose battery you can swap and try for a day?

miketwoms said:
real strange, man... you know anybody else with an Incredible or Evo whose battery you can swap and try for a day?
Click to expand...
Click to collapse
I have 3 batterys and they all work the same
Sent from my HTC Droid Incredible using xda premium

I've been using Joelz XL 4.0r42 for a few days now and I can say battery life is a little worse than 3.9, but not down to 3 hours. I change overnight, disconnect at 7:30am and charge again at 11pm. But that is with 5 or less calls, 10 texts, and emailing only.
Could email be on push? Did you try the power settings under tweak? I have tried normal and performance and see no difference. Someone said that one of the widgets was killing performance in an earlier post (in the PrimeXL thread), maybe the same widget is killing the battery too?
Related question: When should you wipe battery stats? Full charge, almost dead battery, at ROM flashing only?

Alton (Halo 2) said:
I have 3 batterys and they all work the same
Click to expand...
Click to collapse
I dunno, then... try leaving it in Airplane mode for a little while, to see if it's something radio, etc.-related. otherwise, something's probably wrong with a hardware element somewhere along the line. I hope you're able to solve the issue.
OnceAMatrixMan said:
Related question: When should you wipe battery stats? Full charge, almost dead battery, at ROM flashing only?
Click to expand...
Click to collapse
I've read a tip to do this:
-get battery full before installing ROM
-wipe battery stats and flash new ROM
-Let it settle in, set it up a bit, then fill up the battery again
-go back to Recovery and wipe stats again, while it's full.
I'm not clear on the logic behind it - could be somebody's superstitions - but it's not a difficult step to take in the hopes that it does some good.
there are others who said they run a script at shut down to wipe them every time the phone reboots. Seems like everyone has their little tricks.

This may be a long shot, but my guess would be some kind of internal hardware issue. Maybe there's a problem with the micro USB port and it's not actually fully charging the batteries.

Shut the phone off and charge it till the lights green. And if you want any kind of battery life, sense is not the rom to be on. Especially 3.5.
Sent from my ADR6300 using Tapatalk

Try underclocking it
Try underclocking it. This saves my battery life by a lot!!!

Do you use apps that stay using data? Like a messenger?

Nope
Sent from my HTC Droid Incredible using xda premium

What apps you have? if you don't mind
Live wallpaper?

Nope
Btw my battery die so much faster with wallpaper its ridiculous
Sent from my HTC Droid Incredible using xda premium

There are tons of things that effect battery life and tons of things to save battery. Underclocking, undervolting, lengthning time between syncs, increasing wifi scan interval, lowering screen brightness, keeping running services to a minimum. However even with your phone set to max performance settings with all the bells and whistles on, you should still get more than 3 hours out of a charge. If multipul batteries give the same results, i would say its hardware related, or your charger is messed up and its not charging or messing up the batteries.

I wiped battery stats andseeing where that leads me
Right now when I wiped it and I played modern combat 2 for an hour and my percent is 61
So ill say imma get 2 hours out of my batt?
Hey I see progress !
Sent from my HTC Droid Incredible using xda premium

Lol, pretty much any game you play is going to drain your battery

wayneb02 said:
Lol, pretty much any game you play is going to drain your battery
Click to expand...
Click to collapse
Yea ik but usually wen I play that game my battery would be over in 45 mins
Sent from my HTC Droid Incredible using xda premium

Extreme Battery Level Drop After Reboot, Increases During Use

The topic pretty much explains it. I've been using different modified stock roms and now I'm on the latest nightly of CM7, and I keep having this issue. After a reboot at around 50%, the battery drops to 15%. The weird part is that while I continue to use the phone, it slowly rises back up to sometimes 30% and then starts going back down. I've always cleared battery stats when flashing and calibrated (which I believe is unnecessary), but I don't know if this is a problem with the battery, the phone, or if anyone else is having the same issue?
Attached is a screenshot of battery usage. You can see I never actually charged the phone.
Sent from my GT-I9100 using Tapatalk

I have exactly the same issue.
Sent from HydrOG3N MOD S2.
Technology Evolves, Android Evolves.
HydrOG3N is THE Revolution.

[email protected] looks like a bow and arrow..
anyway guys, you need to recalibrate your battery, its not being read accuracy.
download BatteryCalibration from the market, charge your phone till 100% (not just 100% but when it beeps, that its truely at 100%), then use BatteryCalibration to calibrate your battery, and then drain it to 0.. (crank full brightness, turn on LED flashlight, blast internet radio, whatever makes it drain faster to get this part overwith), then recharge it to max.
so;
charge to full 100%
while still plugged in, run BatteryCalibration
discharge to 0%
recharge to 100%
battery successfully calibrated, you will now have an accurate reading

I had exactly the same issue on 3 different custom roms....finally resolved by going bck to stock rom
mgxplyr said:
The topic pretty much explains it. I've been using different modified stock roms and now I'm on the latest nightly of CM7, and I keep having this issue. After a reboot at around 50%, the battery drops to 15%. The weird part is that while I continue to use the phone, it slowly rises back up to sometimes 30% and then starts going back down. I've always cleared battery stats when flashing and calibrated (which I believe is unnecessary), but I don't know if this is a problem with the battery, the phone, or if anyone else is having the same issue?
Attached is a screenshot of battery usage. You can see I never actually charged the phone.
Sent from my GT-I9100 using Tapatalk
Click to expand...
Click to collapse
Sent from my GT-I9100 using XDA App

soraxd said:
[email protected] looks like a bow and arrow..
anyway guys, you need to recalibrate your battery, its not being read accuracy.
download BatteryCalibration from the market, charge your phone till 100% (not just 100% but when it beeps, that its truely at 100%), then use BatteryCalibration to calibrate your battery, and then drain it to 0.. (crank full brightness, turn on LED flashlight, blast internet radio, whatever makes it drain faster to get this part overwith), then recharge it to max.
so;
charge to full 100%
while still plugged in, run BatteryCalibration
discharge to 0%
recharge to 100%
battery successfully calibrated, you will now have an accurate reading
Click to expand...
Click to collapse
I'll try this one more time and report back.

mgxplyr said:
I'll try this one more time and report back.
Click to expand...
Click to collapse
Sorry guys, but your method with BatteryCalibration is useless ....
If you wanna do a correct calibration, look at here http://forum.xda-developers.com/showthread.php?t=1312273
Cheers

Put back the battery on the right side.
8. Turn on the phone.
9. Pray the Battery god
And that post is just nonsense based on the old battery bump method .
jje

mgxplyr said:
The topic pretty much explains it. I've been using different modified stock roms and now I'm on the latest nightly of CM7, and I keep having this issue. After a reboot at around 50%, the battery drops to 15%. The weird part is that while I continue to use the phone, it slowly rises back up to sometimes 30% and then starts going back down. I've always cleared battery stats when flashing and calibrated (which I believe is unnecessary), but I don't know if this is a problem with the battery, the phone, or if anyone else is having the same issue?
Attached is a screenshot of battery usage. You can see I never actually charged the phone.
Sent from my GT-I9100 using Tapatalk
Click to expand...
Click to collapse
i have the same problem when i use custom roms.
i have been using pure stock rom by wannam but rooted for the past week with 12 hours aday syncing and surfing the net and plenty of voice calls via viber and my battery lasts at least 16 to 18 hours.
right now i am using odexed KL3 Kernel KL2Base KL1modem 2.3.6 and it is absolutely amazing interms of battery life and performance.
http://forum.xda-developers.com/showthread.php?t=1292825
http://www.multiupload.com/06I066U6S8
i have gotten rid of all samsung craps through titanium backup. i only have samsung apps application cuz of some paid apps which are for free such as tapatalk and many more on samsung app store.
my free memory is 97mb (original rom free memory is only 27mb)
i dont use any task killers i use 1Tapcleaner pro.

JJEgan said:
Put back the battery on the right side.
8. Turn on the phone.
9. Pray the Battery god
And that post is just nonsense based on the old battery bump method .
jje
Click to expand...
Click to collapse
Maybe, you wanna share a better way to all of us ?

Are you using speeded kernel. If you are then it is because logging and debugging is off.
Sent from my GT-I9100

Completely stock phone never rooted.
Same problem.
Just sayin'
Sent from my GT-I9100 using XDA App

Got the same here, very strange, on CM7
Sent from my GT-I9100 using XDA App

This thing only happens on CM7 for me. It had 40% before reboot and like 15% after. However mine only increased to about 17% then started dropping as usual. This never happened on any stock ROMs I've tried(stock, not themed/modded stock).
Sent from my GT-I9100 using xda premium

did you
did you rsolve the problem ? how? I have the same problem and I tried more stock roms ... I don't know what tot do ....

Its nothing to do with calibration etc, its just how the fuel gauge chip works, it learns and more accurately reports usage over time. For example, if you reboot and (I can't remember the actual voltages for the S2) you have 1200mV, the chip goes, "ah, that is 15% battery." Then as you use it more, it relearns its settings and goes "aaah, my mistake 1200mV is really 30% battery. I'll display that instead."
Its been covered frequently that "calibrating" the battery of the S2 in any way but actually using it, is next to useless.
Sent from my GT-I9100 using xda app-developers app
---------- Post added at 11:05 AM ---------- Previous post was at 11:03 AM ----------
Also just noticed this thread is a year old, but hopefully it will help the poster above.
Sent from my GT-I9100 using xda app-developers app

I'm having this problem too, what did you all do besides get new phones?

Got the same here, after update stock jellybean

Had this problem, when my S2 was half a year old.
I got the original Extended Battery and that solved this issue completely.
The replacement Battery has held up since 2013

soraxd said:
[email protected] looks like a bow and arrow..
anyway guys, you need to recalibrate your battery, its not being read accuracy.
download BatteryCalibration from the market, charge your phone till 100% (not just 100% but when it beeps, that its truely at 100%), then use BatteryCalibration to calibrate your battery, and then drain it to 0.. (crank full brightness, turn on LED flashlight, blast internet radio, whatever makes it drain faster to get this part overwith), then recharge it to max.
so;
charge to full 100%
while still plugged in, run BatteryCalibration
discharge to 0%
recharge to 100%
battery successfully calibrated, you will now have an accurate reading
Click to expand...
Click to collapse
did it but it still there... phone flicks and goes off at or below 40% wont turn on again:crying:

same here and I got the 2000 mAh samsung battery back in the days but now it happens with both of them also when my phone shuts off the screen brightness start flashing weirdly

[Guide] Calibrating battery

I found a guide somewhere on the internet on the best way to calibrate battery stats on a rooted device when I had my old hero and I use it a lot to this day so I decided to share the best way to do it here. If there is in fact a thread about this already in our forums I apologize but I could not find one. So here it is.
Step 1.
First and foremost charge the phone to 100%(Even if it says 100% wait about 5 minutes or so just be sure.)
Step 2.
Once it is at 100% go into data/system (using root explorer) and delete the batterystats.bin file there.
Step 3.
Unplug the charger and reboot to recovery, wipe cache and dalvik cache and wipe battery stats once more while you're there just to make sure they're gone.
Step 4.
Power the phone down and plug it back in. Charge it to 100% while it's off (the battery bar can be deceiving so even once it shows it's full give it five more minutes or so to be sure) and then power up.
*As a side note, if you are using stock kernel, or a kernel without the 100% battery mod then your only going to be at 96%. Thanks to Glennkaonang for reminding me of this.
Once it is booted to the OS you should now see that the battery bar is at 100%. (please note that when it's going through the "Android is upgrading" thing it can take 1 or 2% off the battery if you have lots of apps)
Final step.
Wait for the phone to die completely (to where it shuts off on its own) and let it charge to 100% while the phone is off and power it back up. Do this step at least two or three times.
After that you should have a fully calibrated battery and have no more messed up battery reporting.
Photo of my average battery life just for fun.
Everybody enjoy! If this helped you please hit thanks!
*Thanks to whoever it was that wrote this up in the first place. If I knew who it was I would give proper thanks.
Sent from my Nexus S 4G using xda premium

Unless my batt % reporting goes wonky between reboots, I don't ever wipe stats. It doesn't necessarily increase your battery life, but it does appear to fix incorrect reporting.
Sent from my Nexus S

Wipe batterystats and fix permissions working well after each kernel change but I will give a try.

GideonX said:
Unless my batt % reporting goes wonky between reboots, I don't ever wipe stats. It doesn't necessarily increase your battery life, but it does appear to fix incorrect reporting.
Sent from my Nexus S
Click to expand...
Click to collapse
I didn't think it would improve battery life either but it does. Maybe not a HUGE amount but it definitely does help a little. Plus it will give you the correct percentage rather than showing 100% when it's really only 95%. Lol. Anyways, to each their own.
Sent from my Nexus S 4G using xda premium

It thought someone from Google talked about this before and how it's unnecessary?

doa4ever said:
Wipe batterystats and fix permissions working well after each kernel change but I will give a try.
Click to expand...
Click to collapse
Yeah this is kind of a more in depth way of doing it and it seems to help a bit more.
Sent from my Nexus S 4G using xda premium

Charge it to 100% while it's off (the battery bar can be deceiving so even once it shows it's full give it five more minutes or so to be sure) and then power up.
It's not work on my phone

tuansyaz said:
Charge it to 100% while it's off (the battery bar can be deceiving so even once it shows it's full give it five more minutes or so to be sure) and then power up.
It's not work on my phone
Click to expand...
Click to collapse
Maybe it's not working on your phone because you're using the stock kernel which doesn't have a Battery Life Extender cosmetic MOD.
It's just cosmetic, actually it's still the same 96% as all other Android devices do.
CMIIW

glennkaonang said:
Maybe it's not working on your phone because you're using the stock kernel which doesn't have a Battery Life Extender cosmetic MOD.
It's just cosmetic, actually it's still the same 96% as all other Android devices do.
CMIIW
Click to expand...
Click to collapse
That's pretty much what I was going to say. Lol. I need to add that to the OP.
Sent from my Nexus S 4G using xda premium

This doesn't do anything other than fix incorrect battery logging, it DOES NOT increase battery life in any way.
Not even a tiny bit. Nada. Zip. Zero.
Dianne hackborne covered this on Google+ and said repeatedly that it doesn't extend battery life in the slightest. She would know as she wrote the code I believe.
Placebo effect in operation here. Plain and simple.

Thanks a bunch.

mabry said:
Thanks a bunch.
Click to expand...
Click to collapse
You're very welcome.
Sent from my Nexus S 4G using xda premium

Why do you insist on bumping this? No new information has been uncovered, nothing has changed.
The only reason I can think of is that you are looking to stock up on thanks.

I did this before I even found this thread, save for I use a Battery Calibration app from the market instead of deleting the .bin file. (App does it for me.)
This was the result.
Word.

Great guide! I haven't saw a calibrating guide either. I think it should be sticky!

Joshhayes801 said:
Why do you insist on trolling my stuff? Maybe you should spend your time doing something useful instead of wasting it on something that obviously doesn't matter to you. I bump it so new users can see it. If you don't like it, don't look at it. :thumbup:
Sent from my Nexus S 4G using xda premium
Click to expand...
Click to collapse
I wasn't trying to troll your stuff. I appreciate that somebody created this guide (albeit now proved to be ineffective/useless) as an informative resource for others. That being said, this information is easily found everywhere, especially with search.
Please understand, if everybody bumped a thread they created every few days because they thought it was useful, nothing new would ever show up on the first page of the forum. It would be the same threads appearing over and over.
I wasn't trying to offend you, I just think that bumping dying/dead threads is counter intuitive to growing this forum community.
Thank you.

It is in a sense misinformation though. It doesn't calibrate the battery, merely wipes androids battery usage statistics, which are only for reference to the user not the system.
Although included, the only pseudo calibration is charge fully, discharge fully then charge fully. This process wipes battery stats anyway.

rhanks
Sent from my Nexus S

gear.h34d.2012 said:
I did this before I even found this thread, save for I use a Battery Calibration app from the market instead of deleting the .bin file. (App does it for me.)
This was the result.
Word.
Click to expand...
Click to collapse
I have never calibrated my battery and get almost exactly the same battery life as what you are getting. All this does is wipe the stats.
____________________
Just Flash It !!!

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?
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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.

Sudden battery drop 60% to 50%

Hi guys m using the cm10 by quarx since last 10 days but after the battery calibration I've seen a sudden battery drop from 60% to 50% it's really annoying...
Any suggestions on it
Thanks in advance
vSel are correctly set as
[email protected], [email protected], [email protected], [email protected]
Yes I've overclocked it only the battery is an issue....
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One thing more ...is cm10.1is a daily driver....is it stable?
The one which is on 2.6 aero kernal....
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The screen shots of battery graph
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That's not the problem of the ROM
it's the problem of your battery
Change the battery and the problem will be fixed
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Rawwr said:
That's not the problem of the ROM
it's the problem of your battery
Change the battery and the problem will be fixed
Sent from my MB526 using xda premium
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if my battery has any probs then it'll not charge upto peak i've chk the Vltg levels too...
I dont think so that battery has any probs coz before calibration on that particular ROM I was getting exact flow from 100% to 0%.....so after that calibration m getting that drops so Do I make a clean install or remove the battery profile.....how to remove that battery profile n make a new one?...

Ok, instead of reading around to fix your problem you made a new thread about the same thing.

There is a thread "battery drops explained", just a little down this very page that explains it all. If your battery is >1,5 old, it's getting worn.
Li-Io batterys have a lifetime (end of life is when it only has 80% of it's capacity left) of 500-700 charges. Nowadays people charge their phones at least every two days. Do the math. You'll see some more batterydrops at 20% and 70% (I think), the sum of these drops is how much juice your battery has lost permanently.

Hasuris said:
There is a thread "battery drops explained", just a little down this very page that explains it all. If your battery is >1,5 old, it's getting worn.
Li-Io batterys have a lifetime (end of life is when it only has 80% of it's capacity left) of 500-700 charges. Nowadays people charge their phones at least every two days. Do the math. You'll see some more batterydrops at 20% and 70% (I think), the sum of these drops is how much juice your battery has lost permanently.
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thanks buddy but ive made a clean install of 4.2.2 on my device lets hope now i dont get those drops :angel: