[Q] Battery Calibration - Galaxy S I9000 Q&A, Help & Troubleshooting

Hi,
i've searched the web, searched here in the forums for a good guide on how to calibrate your battery, but i found many guides for many phones, so i just looking to find the right way of doing it for my phone.
i own a Samsung Galaxy S GT-I9000 i have MCG v6 MIUI ROM with NEO 06 Kernel with it.
i also have a 3500 mAh battery with my phone.
every time i flash a new rom i wipe the battery stats, i tend to charge my phone everytime i get a chance, trying to keep it as high as possible. i also tend to let my battery run out, then charge it all the way up once a month.
i also notice how every time i shut down my device or take out the battery i lose about 5%~.
so if anyone can guide me the right way of calibrating my battery it will be great and much appreciated. thanks.

J0HNiE said:
Hi,
i've searched the web, searched here in the forums for a good guide on how to calibrate your battery, but i found many guides for many phones, so i just looking to find the right way of doing it for my phone.
i own a Samsung Galaxy S GT-I9000 i have MCG v6 MIUI ROM with NEO 06 Kernel with it.
i also have a 3500 mAh battery with my phone.
every time i flash a new rom i wipe the battery stats, i tend to charge my phone everytime i get a chance, trying to keep it as high as possible. i also tend to let my battery run out, then charge it all the way up once a month.
i also notice how every time i shut down my device or take out the battery i lose about 5%~.
so if anyone can guide me the right way of calibrating my battery it will be great and much appreciated. thanks.
Click to expand...
Click to collapse
I do have same phone with 3000mah battery, I amusing the phone for aabout an year, installed various updates, custom ROMs, nightlies...etc..
I never done a battery caliberation.
Every time when you get a chance, charging your phone is wrong, it will kill your battery soon.
Read this carefully
http://www.androidpolice.com/2010/1...bump-charging-and-inconsistent-battery-drain/
it is quite normal to see a 5% power loss after reboot, but it is an incorrect reading.
After flashing a new ROM or updating, best option is do not plug into a charger. Allow your phone on standby and turn off some unwanted features, if not in use like, GPS, background sync etc.... Ideally you should turn them off before updating, allowing your modem to start with minimal load, so it can rewrite dalvik cache with minimum error.
Within few hours after updating, batterystats will get back to normal. I atleast give 6 hrs before I plug into charger.
Thanks

Related

[Q] Help, extreme battery drain!!

Hello
I can't use my Galaxy S more than 3 hours, after that the battery is on 0 %. I've tried some of the guides here, but nothing helps. My phone is running Darky's Rom 9.1 Extreme Edition. I would be thankful if some of you could help, so i can use my phone without it should be plugged in the charger!
- Mosawer
I also got some issues with darky's 9.1. Did you tried 9.2 version? it solved most of my battery problems. but still i can't wipe battery status from the CWM.
No but i would definitely try it. I've also had Darky's rom 8.0, and the battery life wasn't the best on that also. To be honest, my phone has never survived a whole day without i should plug in the charger. I've also tried the battery wipe, but it didnt work, actually it just got worse. Before i tried the battery wipe, it could hold 7-10 hours, but now i cant use it more than 4 hours.
you could calibrate your battery, as flashing ROMs all the time can confuse the battery and make it think it is at a different % than it actually is.. try this
1. Run the device down until it turns itself off.
2. Turn it back on and wait for it to turn itself off again.
3. Remove the battery for 10 seconds.
4. Replace the battery, but leave the device off.
5. Charge the device until full and then for another hour.
6. Boot into recovery and reset battery stats (or, go to console and type “su” enter, followed by “rm /data/system/batterystats.bin”)
7. Run the device’s battery down until it turns itself off.
8. Charge to full while off.
9. Restart and use as normal.
when you have done that you could try a battery saving app i use juice defender its free, but there is a paid version with more features. what this does is everytime the phone sleeps (screen off) it disables all connections like 3g wifi data mode etc but still allows you to receive calls and texts..
also get your self a good task killer, and place a icon on the home screen to kill running apps quick, i do this everytime i put my phone in my pocket, making sure nothing is eating my battery apart from me when im using it.
try them methods and post back with your results in say 2days time ?? good luck
EDIT: another thing to do is use automatic brightness, this adjust the brightness of the screen depending on the ambience of where you are. e.g if its sunny the screen dims down, if its dark it brightens up... great for saving battery.
Thanks man, i will try calibrating my battery this way, but dont think i'm gonna download the task killer og battery saver, but i'll sure post my result after i've tried it !
well there is samsungs own built in task manager its good, you will be suprised what apps open up on their own and start using your connections and running processes without you even knowing. all that drains battery. but just see how you go
Well it didnt work dude, the battery life still sucks as much as before
- Anyone else who wants to help me?
Maybe u need a new battery...
Sent from my Green Robot Device
If you flash a rom and the battery no longer behaves as it should and hundreds of other posts report exactly the same problem . Then is it not the rom you flashed to blame .
jje
Yeah i know, but it was after i've flashed the problem occured. I tried calibrating my battery plenty times without luck.
- I really dont know what it is, and its very frustrating!!
mosawer said:
Yeah i know, but it was after i've flashed the problem occured. I tried calibrating my battery plenty times without luck.
- I really dont know what it is, and its very frustrating!!
Click to expand...
Click to collapse
Hey... first off, what sort of things are you doing with your phone? Casual browsing, youtube, streaming? Wifi, GPS on?
If the battery is not defective, there must be some program instance that is draining that battery.
Wifi, GPS and that sort of things are off. I'm browsing a little bit, and then just use my apps and games, and of course i write some sms's. and hear music.
Thats the thing i'm doing on my phone.
Btw: When i unplug my phone from the charger, it immidately drops 2-4 %.
Btw: When i unplug my phone from the charger, it immidately drops 2-4 %.
You have a darky rom its a known problem read his pages .
jje
Is the extreme drain also a darky problem?
Read posts on darky section if you have problems likewise read posts on xxx rom section if you have that rom makes sense .
jje
There are 2000 pages of posts man Do you want me to read that?
mosawer said:
There are 2000 pages of posts man Do you want me to read that?
Click to expand...
Click to collapse
I ain't going to read them for you .
jje
Running
Docs Rom Kitchen and no battery drain
Haha okay
But i would be pleased if someone have a solution for this problem!
Nothing have worked, but i finally remember how the battery drain started! It was when i decided to calibrate my battery. After i did it, the extreme battery drain started! So it has nothing to do with Darky's rom or something else, i is the battery calibratings problem. Anybody knows how to fix it???

Poor Battery Life On Overcome Jupiter

Hi,
I don't have sufficient posts to be able to participate directly in that forum, so have no other choice but to raise my queries here.
I've just flashed over from Overcome "Hermes" to "Jupiter". All's well except that the battery performance is quite drastically affected for me.
I've been reading the improved battery life "Jupiter" gets over earlier versions of the Overcome ROMs, but I seem to be experiencing the opposite.
Already did the batt stat wipe via recovery menu. Do I need to so call "run-in" before it reflects correctly? Even if accuracy is one thing... but dropping 3% just on bootup.... is this typical of an uncalibrated battery?
Appreciate any advise here on what I should do. (Apart from a fresh wipe install )
Thanks
I appreciate the enthusiasm these coding geniuses have in rolling out update after updates in the ROMS yet I am apprehensive about the effect of these frequent flashing on the Galaxy Tab components itself. This includes the battery.
My job involves electronic repair and there is a so called number of hours before an equipment goes for a thorough check(preventive maintenance) say for example 1000 hours on a meter. Unfortunately the galaxy tab (or any tablet) does not have this. So if you frequently do a flashing on your tab you subject the electronic components to unnecessary stress,thereby affecting the life of the components like the battery.
In "normal" everyday use of the tab you will seldom do any restart/reboot of your tab,yet in flashing ROMs as many as 3 reboots is needed. As I don't know how to measure the surge in current during reboot, I can just imagine how high an initial current during startup is generated, thus putting a big strain on the battery.
Unfortunately the battery is not user detachable.
There was an author here in XDA describing himself/herself as an "flashing addict"(or something similar). I would like to appeal to everyone-please don't be a flashing addict.
As for battery issue read here
JUST MY FEW CENTS!
PCdumb said:
Hi,
I don't have sufficient posts to be able to participate directly in that forum, so have no other choice but to raise my queries here.
I've just flashed over from Overcome "Hermes" to "Jupiter". All's well except that the battery performance is quite drastically affected for me.
I've been reading the improved battery life "Jupiter" gets over earlier versions of the Overcome ROMs, but I seem to be experiencing the opposite.
Already did the batt stat wipe via recovery menu. Do I need to so call "run-in" before it reflects correctly? Even if accuracy is one thing... but dropping 3% just on bootup.... is this typical of an uncalibrated battery?
Appreciate any advise here on what I should do. (Apart from a fresh wipe install )
Thanks
Click to expand...
Click to collapse
According to the Tweaks section at the team overcome website, it will take several charge cycles before you notice an improvement after the stat wipe. Try giving it a few days before going any further.
PS Not to question your ability to follow instructions (sometimes we miss things) but did you charge to 100% with the tab off?
Yes, I did charge to 100% with the Tab off.
Now upon reading the instructions once more..... I might have conducted it slightly different from the written procedure.
I unplugged the Tab from the mains, then only booted up and wiped the batt stats before re-booting. Hmmm.... maybe I'll go try booting up while still plugged into the mains, do the batt stat wipe, and re-boot. (all while plugged into the mains). Then only unplug the charger.
Wonder is there any diff in doing so.....
Would definitely try re-doing it with the tab plugged in while doing the stat wipe. And if it doesn't seem to fix it, do go through a few cycles before reverting back to a previous ROM.
It's important to completely drain your battery before recharging it to 100% in order to complete a cycle.
Hope you fix it. Battery life results vary between tab's even if they are used very similarly, I'm running the OVERCOME Jupiter ROM with IMPROVED battery life. I keep my Bluetooth, Wifi and GPS on all the time. I also flash quite often and have not seen a decrease in overall battery life. It seams that each tab is a bit different, hardware wise, than one another. Everything from battery to board it seems is slightly different coming out of the manufacturing process.
Thanks. Will try that out.
But it just seems strange coming from Overcome ver 1.4 (Froyo) which had no batt drain problem.... to Hermes which was better in batt performance.... to Jupiter which I'm experiencing heavy drain.
As I did a NoWipe install, all apps and setting are similar (except the new market app).
I was able to run 2 movies back to back (about 3 hours total) and still have at least 40% life left (usually about 45 to 50%). Now on Jupiter, just fiddling around testing the various features for functionality, plus maybe an hour of NFS (total about 3 hours as well).... the batt drops to about 10% life.
Anyway, I'll re-do the calibration and and give it some time to "settle in". Hopefully, that is all that is needed. (I would hate to have to do a full wipe install... and re-installing all apps)
PCdumb said:
Thanks. Will try that out.
But it just seems strange coming from Overcome ver 1.4 (Froyo) which had no batt drain problem.... to Hermes which was better in batt performance.... to Jupiter which I'm experiencing heavy drain.
As I did a NoWipe install, all apps and setting are similar (except the new market app).
I was able to run 2 movies back to back (about 3 hours total) and still have at least 40% life left (usually about 45 to 50%). Now on Jupiter, just fiddling around testing the various features for functionality, plus maybe an hour of NFS (total about 3 hours as well).... the batt drops to about 10% life.
Anyway, I'll re-do the calibration and and give it some time to "settle in". Hopefully, that is all that is needed. (I would hate to have to do a full wipe install... and re-installing all apps)
Click to expand...
Click to collapse
As mentioned in the Tweaks section, perform the Stat wipe and then two full recharge cycle
recharge to 100% (while the Tab is closed) then drain the battery till it is off then repeat the cycle and you will enjoy it man
Please tell me if you need anything
bongski55 said:
I appreciate the enthusiasm these coding geniuses have in rolling out update after updates in the ROMS yet I am apprehensive about the effect of these frequent flashing on the Galaxy Tab components itself. This includes the battery.
My job involves electronic repair and there is a so called number of hours before an equipment goes for a thorough check(preventive maintenance) say for example 1000 hours on a meter. Unfortunately the galaxy tab (or any tablet) does not have this. So if you frequently do a flashing on your tab you subject the electronic components to unnecessary stress,thereby affecting the life of the components like the battery.
In "normal" everyday use of the tab you will seldom do any restart/reboot of your tab,yet in flashing ROMs as many as 3 reboots is needed. As I don't know how to measure the surge in current during reboot, I can just imagine how high an initial current during startup is generated, thus putting a big strain on the battery.
Unfortunately the battery is not user detachable.
There was an author here in XDA describing himself/herself as an "flashing addict"(or something similar). I would like to appeal to everyone-please don't be a flashing addict.
As for battery issue read here
JUST MY FEW CENTS!
Click to expand...
Click to collapse
where you were hiding this all ? i bet you were so damn angry to say all of this , i never saw you writing more than 3-4 lines , chill out buddy .
@The OP flashing custom roms means battery need to re-life back
bongski55 said:
I appreciate the enthusiasm these coding geniuses have in rolling out update after updates in the ROMS yet I am apprehensive about the effect of these frequent flashing on the Galaxy Tab components itself. This includes the battery.
My job involves electronic repair and there is a so called number of hours before an equipment goes for a thorough check(preventive maintenance) say for example 1000 hours on a meter. Unfortunately the galaxy tab (or any tablet) does not have this. So if you frequently do a flashing on your tab you subject the electronic components to unnecessary stress,thereby affecting the life of the components like the battery.
In "normal" everyday use of the tab you will seldom do any restart/reboot of your tab,yet in flashing ROMs as many as 3 reboots is needed. As I don't know how to measure the surge in current during reboot, I can just imagine how high an initial current during startup is generated, thus putting a big strain on the battery.
Unfortunately the battery is not user detachable.
There was an author here in XDA describing himself/herself as an "flashing addict"(or something similar). I would like to appeal to everyone-please don't be a flashing addict.
As for battery issue read here
JUST MY FEW CENTS!
Click to expand...
Click to collapse
Viewed purely from an engineering perspective, I'm unable to see any significant connection between the flashing of the ROM and a degradation of battery capacity. Further, in the event that the TAB was connected to a charger during the flashing, I can see absolutely no connection at all! Please help me understand your logic.
Ok Back on topic. PCdumb (dude what's with the username lol). Check your app list. It could a new app you or an old app you updated or an app you didnt use before but you use now that is being a battery hog. A small trick I learned is checking apps running services in the background. Go to Settings, applications, running services and check (why is skype working after Isigned out its not a battery drainer but I hope you got the picture).
Thanks for the advise. That was one of the 1st few things I did to check that there's nothing out of the ordinary running in the background and taking up the juice.
Mine's actually draining alot when in usage. Not too sure about when in standby.... will check later.
If after a few charge cycles and the drain is still bad, guess my only next best option is to do a full wipe, re-stock and re-install.....
I did not get any effect from Battery calibration. As expeced. Anybody did actually?
The background services instead might have an effect on power consumption, I agree. But needs numerous testing...
Batt recal did not give me better battery life. There's no difference in the battery performance after 3 recharge cycles.
My tab can at most get slightly more than 5 hours of continuous usage compared to about close to 7 hours on hermes. This is when i dial down the OC from smartass mode to conservative and also put the min freq to 200 instead of 400 which was the setting i was using all the while.
Doesn't seem to be anything else running in the background. On standby overnight, i only lose about 3% which is not too bad. But when in use, that's where the Batt drains fast. Just for comparison, i only lost 1% at most for overnight standby of about 7 hours when running hermes.
Guess I'll have to live with this if i want the speed and smoothness. Still contemplating whether to restock and do a clean flash.
PCdumb said:
Batt recal did not give me better battery life. There's no difference in the battery performance after 3 recharge cycles.
My tab can at most get slightly more than 5 hours of continuous usage compared to about close to 7 hours on hermes. This is when i dial down the OC from smartass mode to conservative and also put the min freq to 200 instead of 400 which was the setting i was using all the while.
Doesn't seem to be anything else running in the background. On standby overnight, i only lose about 3% which is not too bad. But when in use, that's where the Batt drains fast. Just for comparison, i only lost 1% at most for overnight standby of about 7 hours when running hermes.
Guess I'll have to live with this if i want the speed and smoothness. Still contemplating whether to restock and do a clean flash.
Click to expand...
Click to collapse
If you want to confirm that JUPITER is the reason that you are experiencing poor battery life, try re-installing a previous version that you feel worked better for you. Maybe reverting back to a previous version may yield better battery results, and I sure hope so, this way you will know if it's the ROM or other elements affecting the abnormal battery drain.
If you do see an increase in battery life, try flashing JUPITER again, see what the results are. I don't know if flashing and re-flashing will have a negative long term effect on your SGT, I know that I flash every time a new release is out (Stock safe, cooked ROM, Kernel) and if i'm not happy with the release i go back to a proven one by flashing another three times (stock safe, cooked ROM, Kernel) and so far I have not had any (knock on wood) abnormal battery activity.
It's worth giving it a shot (if you haven't already).
EDIT: I know, I know the proper sequence is stock safe, kernel, rom.
after week of using the Overcome ROM i can confirm that the battery performance is between 85 and 90% from the Orignial stock ROM performance
No problem since this is normal as we are using a cooked ROM
bongski55 said:
I appreciate the enthusiasm these coding geniuses have in rolling out update after updates in the ROMS yet I am apprehensive about the effect of these frequent flashing on the Galaxy Tab components itself. This includes the battery.
My job involves electronic repair and there is a so called number of hours before an equipment goes for a thorough check(preventive maintenance) say for example 1000 hours on a meter. Unfortunately the galaxy tab (or any tablet) does not have this. So if you frequently do a flashing on your tab you subject the electronic components to unnecessary stress,thereby affecting the life of the components like the battery.
In "normal" everyday use of the tab you will seldom do any restart/reboot of your tab,yet in flashing ROMs as many as 3 reboots is needed. As I don't know how to measure the surge in current during reboot, I can just imagine how high an initial current during startup is generated, thus putting a big strain on the battery.
Unfortunately the battery is not user detachable.
There was an author here in XDA describing himself/herself as an "flashing addict"(or something similar). I would like to appeal to everyone-please don't be a flashing addict.
As for battery issue read here
JUST MY FEW CENTS!
Click to expand...
Click to collapse
WOW ! This was an eye opener for me...
Thanks for clarifying this...... I didn't know this was so bad for the hardware ....
Sent from my GT-I9003 using Tapatalk
PCdumb said:
Batt recal did not give me better battery life. There's no difference in the battery performance after 3 recharge cycles.
My tab can at most get slightly more than 5 hours of continuous usage compared to about close to 7 hours on hermes. This is when i dial down the OC from smartass mode to conservative and also put the min freq to 200 instead of 400 which was the setting i was using all the while.
Doesn't seem to be anything else running in the background. On standby overnight, i only lose about 3% which is not too bad. But when in use, that's where the Batt drains fast. Just for comparison, i only lost 1% at most for overnight standby of about 7 hours when running hermes.
Guess I'll have to live with this if i want the speed and smoothness. Still contemplating whether to restock and do a clean flash.
Click to expand...
Click to collapse
After reading all this superb discussion....
I would just recommend you to go back to your older rom.....
Its forbthe best....
Sent from my GT-I9003 using Tapatalk
I do get 4 to 5 hours of continuous use with overcome Jupiter, mostly browsing the web over
WLAN or umts. Hermes release didn't gave me so much more juice, probably 5 hours.
In the background I have emai push, contacts and calendar sync and some instant messaging apps, if I switch off all that I might get an hour or so more.
PCdumb said:
...On standby overnight, i only lose about 3% which is not too bad. But when in use, that's where the Batt drains fast. Just for comparison, i only lost 1% at most for overnight standby of about 7 hours when running hermes...
Click to expand...
Click to collapse
Wow, maybe your tab is one of the ones with a battery from the bad batch, and it's finally on its way out. I upgraded from the stock AT&T Rom to Overcome Jupiter, and on Airplane Mode with all stock settings (no overclock or undervolt), mine only drops 1% in standby over 14 hours and I can get about 5 hours of video watching straight with the brightness on max before it dies!
DarkPal said:
A small trick I learned is checking apps running services in the background. Go to Settings, applications, running services and check (why is skype working after Isigned out its not a battery drainer but I hope you got the picture).
Click to expand...
Click to collapse
I also been experiencing a major increase in battery drain even after doing a couple wipes exactly according to the tweak guide. I went from about 24 hour normal use down to 6-8 hours normal use.
Checked the services as per your suggestion above and found a couple major battery drainers running. Skype and Yahoo but also Google+. What I dont understand is why Skype and Yahoo would be running even though I had not started either since at least several re-boots ago. I had Skype and Yahoo installed for quite a while Google+ is a new one. Anyway I killed all of them and now and will see what happens next.
Not sure thought that this is all there is to the issue. Recahrging is finiky as well. I can turn off the tab and let it charge all night just to find that it charged to about 70% if I re-plug it might charge to 90%-95% and then if re-plug it might get to 100%. The drain from 100% to 60%-70% is extremely fast and still quite fast from there. On one occasion after complete drain I couldnt get it to start charging at all for about 5-10 minutes. I was checking power, cables, connections and starting to panic when all of a sudden it started to charge.
Any advice on possible reasons or solution woud be appreciated. Not sure I want to go beck to stock ROM and un-root just to take it to service center for repairs.

[Q] Battery health

Hi, I would like to know the best way to measure my battery health. For about a month my battery starts to drain fast. I know my phone is already old and battery don't handle the same charge, but I have recharged the phone all night long and in ten minutes using wifi to just update some apps the battery just gone.
It is just ridiculous as I don't use any different configuration.
To be more specific, my phone configurations are:
- Cyanogenmod 7.2 by vo-1 (31/06/2012) deodexed by me;
- Firekernel Unnoficial OC (22/07/2012), CPU governor: smartassv2, max 787, min 245;
- Adrenaline Engine 4.2b;
One more thing. I was facing the same problem with blackhawk kernel.
I just think a battery can't die a sudden.
Could anyone help me with this?
Floydroider said:
Hi, I would like to know the best way to measure my battery health. For about a month my battery starts to drain fast. I know my phone is already old and battery don't handle the same charge, but I have recharged the phone all night long and in ten minutes using wifi to just update some apps the battery just gone.
It is just ridiculous as I don't use any different configuration.
To be more specific, my phone configurations are:
- Cyanogenmod 7.2 by vo-1 (31/06/2012) deodexed by me;
- Firekernel Unnoficial OC (22/07/2012), CPU governor: smartassv2, max 787, min 245;
- Adrenaline Engine 4.2b;
One more thing. I was facing the same problem with blackhawk kernel.
I just think a battery can't die a sudden.
Could anyone help me with this?
Click to expand...
Click to collapse
There are a few things that can be causing this, but the first thing that you can try is to wipe your battery stats using "BatteryCalibration" app. After flashing a few things, it's best to do this. I had the same thing happen after flashing my third ROM or so.
After that, it basically comes down to the apps and widgets that you have running. Shut them off with a task manager so they don't end up draining your battery, but it might not be that either....
The only other thing that I can think of is that I heard in another thread (I really wish that I could find it again ) that the ace has a motherboard fault that causes it to drain faster than usual.
Other than that, all I can say is that the Ace generally has poor battery life, and it really does suck, but I don't really know how much more you can do. You could try flashing a stock-light ROM and see if it does the same thing (wipe battery stats too). But I would say is that you should try wiping the stats and see if anything changes.... Other than that.... I`m out. Hopefully it helps, and if it doesn`t, you might need to take it in (Service Center or wherever you bought the phone).
Maybe try searching in other threads (as it is a common problem) but besides that, goodluck :fingers-crossed:
thatdude02 said:
There are a few things that can be causing this, but the first thing that you can try is to wipe your battery stats using "BatteryCalibration" app. After flashing a few things, it's best to do this. I had the same thing happen after flashing my third ROM or so.
Click to expand...
Click to collapse
I forgot to mention but I already did the calibration, using the app and manually to see if I could get different results.
I even tried to force a better charge, charging the phone off, waiting till 100%, unplugging and recharging, till the phone gets 100% again.
Ace's battery isn't good, but a month ago my phone was holding 12-14 hours without charge, using wifi a lot, that's why I think something is wrong.
Well, I'm flashing the original stock rom to see if get some change.
Thanks about the motherboard information, this is new for me :good:
Gonna see tomorrow if the battery holds better with the original stock ROM.
Thanks again!
Wiping the battery stats is a myth. All it does it clear the battery usage screen!
Android has a built in tool which can try to check the health of your battery.
Open the dialer
type *#*#4636#*#*
then go to battery information
Look at battery health.
Feedback
Just to give a feedback, my battery was really damaged. I bought a new one, stock because I didn't find other, and the phone now easily last a day, even using wifi a lot.
But that's not the only reason why I posting here again, I want to share how my old battery is. Comparing with new one, I realized that the old battery had stuffed something about 5 mm
If you pay attention, you'll see the small deformation.
Don't know yet what could have cause this, but I think it was heat and bad recharges...
Thanks for the help :good:
Floydroider said:
Just to give a feedback, my battery was really damaged. I bought a new one, stock because I didn't find other, and the phone now easily last a day, even using wifi a lot.
But that's not the only reason why I posting here again, I want to share how my old battery is. Comparing with new one, I realized that the old battery had stuffed something about 5 mm
If you pay attention, you'll see the small deformation.
Don't know yet what could have cause this, but I think it was heat and bad recharges...
Thanks for the help :good:
Click to expand...
Click to collapse
I'd recommend you to use SetCPU to prevent this on your new battery. Set up a profile with sound notification when it hits around 40degree, and underclock it at the same time.
I faced a similar problem. Battery was hardly six months old when it died but it was my fault. I was running a wi-fi tether and continuously charging it for about two days. :silly:
Got a new one under warranty. Been a year with the new battery and just recently facing problems with it. 3G just sucks the life out of it.
OK I just got 3g on my phone (yay for promotional 6gb plans!). But yeah, the 3g definitely kills my battery. I used to be able to go two or three days with very little use. Now I can only go one day even with standby with my 3g enabled. As long as I can put my phone on to charge before it dies, its all good to me
Finally with my 3g going, I understand everyone else's pain with the battery life haha
Sent from my GT-S5830 using xda premium

[Q] Galaxy S Plus battery swelling?

Dear fellow enthusiasts,
since a couple of days, I'm experiencing sudden device crashes when I'm using it for network related activities, mostly over the 3G network (for example, I'm typing out a message on the Facebook app, and the phone goes into boot loop or simply "shuts down"). I had only recently upgraded to the 4th beta build for the Cyanogenmod 9, hosted here on XDA , so I suspected it would be related to this. However, upon reinstalling both the previous version and the new mod from absolute scratch, the issues remained the same.
I had noticed that after each crash, the battery charge displayed as very low (2-6%), whereas I'm certain the charge should be much higher. So I thought it might be some sort of corrupt battery-cache issue or something.
However, and here's my actual question, I just now noticed that my I9001 battery is slightly bulged, on both ends. This bulge starts just above the white printed SAMSUNG lettering, and it ends just bellow the QR code. I can't for the life of me remember if or not this is normal, so could someone please confirm this for me?
And while we're at it, could a faulty battery affect my performance as such (making my phone crash etc)?
Thank you very much in advance for any help or information anyone could give me.
I confirm, battery is slightly bulged in those places but it looks like a production "thing" to me (I hope I understood what you mean), no need to worry, I guess. Looks like corrupted battery stats, try to wipe it via recovery (phone fully charged, plugged in - then wipe battery stats). After that, i recommend one or two full battery discharge - charge cycles. I've noticed hovever, that after each full factory reset I have for about 20% better battery drain, than after flashing many ROMs, kernels and updates (cache and dalvik cache wipe only), my battery drain is getting pretty annoying. Try a full factory reset, if wiping battery stats didn't work.
Jacol82 said:
I confirm, battery is slightly bulged in those places but it looks like a production "thing" to me (I hope I understood what you mean), no need to worry, I guess. Looks like corrupted battery stats, try to wipe it via recovery (phone fully charged, plugged in - then wipe battery stats). After that, i recommend one or two full battery discharge - charge cycles. I've noticed hovever, that after each full factory reset I have for about 20% better battery drain, than after flashing many ROMs, kernels and updates (cache and dalvik cache wipe only), my battery drain is getting pretty annoying. Try a full factory reset, if wiping battery stats didn't work.
Click to expand...
Click to collapse
Thanks a lot for the confirmation Jacol !
Anyone else who can confirm a bulging of the 1650mAh battery for the I9001? I'd like a large enough sample group if possible.
also happened to me
solved this problem by buying another battery...
Blumdum said:
also happened to me
solved this problem by buying another battery...
Click to expand...
Click to collapse
Thanks Blumdum, do you mean you also had your phone crash on you?
yes
i charged the battery
after some time my phone turned off
i restarted it and i had only 2% battery left
then i took a look on the battery stats and there was a huge drop from like 95% to 2%
Blumdum said:
yes
i charged the battery
after some time my phone turned off
i restarted it and i had only 2% battery left
then i took a look on the battery stats and there was a huge drop from like 95% to 2%
Click to expand...
Click to collapse
Thanks Blumdum, I've ordered a new battery, it should arrive within a couple of days, I'll confirm if this fixes the issue.
Same thing happened to me,i will order momax 1700mah
Sent from my GT-I9000 using xda premium
Hey people,
I received my new battery last night, I went for an Akku Powercell of 1800mAh. Charged overnight, been using it all day, no problems whatsoever to be found.
Thanks again for the assistance!
Swollen battery = defective!
I'm sorry but I've encountered this as well in the past. Normally working phone with sudden shut downs and huge drops in battery charge. It took me a long time to convince me that the battery was defective. So maybe this would save you guys some time in finding this out!
Verstuurd van mijn GT-I9001
Hey, try to use cm10 for a few days, if the problem gone then your battery is alright, and please stop using beta roms, regret are so buggy and slow: )
Sent from my GT-I9000 using xda premium
In general healthy batteries DO NOT swell. Buy a new one before it explodes or starts leaking...
Hey all, just because people keep on posting, the battery was indeed defective, the roms were absolutely fine and the new battery is performing marvellously!
Thanks again for all the input !
Jacol82 said:
I confirm, battery is slightly bulged in those places but it looks like a production "thing" to me (I hope I understood what you mean), no need to worry, I guess. Looks like corrupted battery stats, try to wipe it via recovery (phone fully charged, plugged in - then wipe battery stats). After that, i recommend one or two full battery discharge - charge cycles. I've noticed hovever, that after each full factory reset I have for about 20% better battery drain, than after flashing many ROMs, kernels and updates (cache and dalvik cache wipe only), my battery drain is getting pretty annoying. Try a full factory reset, if wiping battery stats didn't work.
Click to expand...
Click to collapse
I have the exact same problem with my sgs i9000-gt.
My phone turn off itself ( no restarts, its a complete shutdown ).
First, I thought i might be a problem of GB 2.3.6 rom i was using, so i updated to latest cm10 but the problem persists.
If you restart the phone after the shutdown than i shuts down within a minute again.
Also the battery drain is pretty fast. I notice the same bulges on the battery as reported in this post.
I did the battery calibration thing as some people suggested, but that does not solves the problem. However, it got rid of the fast changes in battery status which was happening before. Like when you restart after shutdown at 80% battery status, it will show like 2% battery left and after few minutes of charging it would boost back to 80-90%.
But still the battery drain is pretty fast. It discharges from 98% (i cannot get to 100% charge, 98% is highest) to 50 % within an hour, just idling.
And when i am around 40% or so and if i recieve some message and try to open a app it shuts down again.
I have ordered a new battery just in case. Will update here if that improves things for me. But i will still like advice on which is a more economical kernel and rom for i9000-gt? Some people suggested slim bean + semaphore on some forums but i would like to have some more concrete advice before i change more things without knowing the source of the problem. I would be grateful if someone can suggest what is best to use with some details( version, etc). Thanks for that in advance.
I thank you all (users + developers) for all the useful information provided on this forum, i learnt a lot although i still am not able to fix my problem . And I hope someone might come up with a concrete solution for this problem. If there is a solution which I might have missed, I thank you in advance again and hope you will be kind enough to point me in the right direction.
cheers
update: the phone stays alright if u dont do anything on it, but the moment you being doing something on it other than playing with system settings, like run some app, especially something that uses network / wifi, it shuts down. none of this happens though while its plugged in. it happens only when its on battery.
problems fixed so far after replacing the battery
maxffm said:
I have the exact same problem with my sgs i9000-gt.
My phone turn off itself ( no restarts, its a complete shutdown ).
First, I thought i might be a problem of GB 2.3.6 rom i was using, so i updated to latest cm10 but the problem persists.
If you restart the phone after the shutdown than i shuts down within a minute again.
Also the battery drain is pretty fast. I notice the same bulges on the battery as reported in this post.
I did the battery calibration thing as some people suggested, but that does not solves the problem. However, it got rid of the fast changes in battery status which was happening before. Like when you restart after shutdown at 80% battery status, it will show like 2% battery left and after few minutes of charging it would boost back to 80-90%.
But still the battery drain is pretty fast. It discharges from 98% (i cannot get to 100% charge, 98% is highest) to 50 % within an hour, just idling.
And when i am around 40% or so and if i recieve some message and try to open a app it shuts down again.
I have ordered a new battery just in case. Will update here if that improves things for me. But i will still like advice on which is a more economical kernel and rom for i9000-gt? Some people suggested slim bean + semaphore on some forums but i would like to have some more concrete advice before i change more things without knowing the source of the problem. I would be grateful if someone can suggest what is best to use with some details( version, etc). Thanks for that in advance.
I thank you all (users + developers) for all the useful information provided on this forum, i learnt a lot although i still am not able to fix my problem . And I hope someone might come up with a concrete solution for this problem. If there is a solution which I might have missed, I thank you in advance again and hope you will be kind enough to point me in the right direction.
cheers
update: the phone stays alright if u dont do anything on it, but the moment you being doing something on it other than playing with system settings, like run some app, especially something that uses network / wifi, it shuts down. none of this happens though while its plugged in. it happens only when its on battery.
Click to expand...
Click to collapse
I flashed back to stock samsung rom ( from the value pack) and the problem persisted.
today my new battery arrived and all the forementioned problem seems to be gone with the new battery, my phone seems to be working fine for last 5 hrs without any restarts or crazy battery drain. will test the same with custom roms again. As of now it only seems that problem was the battery.
Cheers.
thanks to the forum and developers

Battery help please

I know there are countless threads/topics regarding high battery usage re p880, but I didn't want to resurrect an old thread, or hijack someone else's, so if I'm wrong in creating this thread, then I apologise.Can someone please tell me what exactly this service is/does, as it seems to be the biggest problem regarding my lousy battery life.. phone just sees it as android system (pic 3) where as BS+ sees system back up service. As i have backup disabled, this is puzzling me.
Thanks in advance,
Edit: in the time it took to write this message, ive lost 14% in battery, including the time it took to screenshot.
Edit 2: Ah, now im back on PC i can type properly.
been playing around, disabling system backup service, but a new process just gets launched in its place, from key chain, to LocMgrProvider...seems as you disable one, another replaces it, all using same battery. Must i just accept, that the android system is just going to eat my battery?..like cookie monster at the biscuit counter?
If it helps, im running stock 4.0.3, freshly flashed, with F/reset, unrooted.
Thanks in advance, and any help is very much appreciated,
Sun
Sent from my LG-P880 using Nuke Powered Pigeon
SunHounD said:
I know there are countless threads/topics regarding high battery usage re p880, but I didn't want to resurrect an old thread, or hijack someone else's, so if I'm wrong in creating this thread, then I apologise.Can someone please tell me what exactly this service is/does, as it seems to be the biggest problem regarding my lousy battery life.. phone just sees it as android system (pic 3) where as BS+ sees system back up service. As i have backup disabled, this is puzzling me.
Thanks in advance,
Edit: in the time it took to write this message, ive lost 14% in battery, including the time it took to screenshot.
Edit 2: Ah, now im back on PC i can type properly.
been playing around, disabling system backup service, but a new process just gets launched in its place, from key chain, to LocMgrProvider...seems as you disable one, another replaces it, all using same battery. Must i just accept, that the android system is just going to eat my battery?..like cookie monster at the biscuit counter?
If it helps, im running stock 4.0.3, freshly flashed, with F/reset, unrooted.
Thanks in advance, and any help is very much appreciated,
Sun
Sent from my LG-P880 using Nuke Powered Pigeon
Click to expand...
Click to collapse
that's... waaaaaay too much. why are you on ICS anyway?
my suggestion is - factory reset from stock recovery (warning: your internal sd card will be fully formatted). in case you don't care about ICS, i strongly suggest JB. if you don't care about voiding warranty, i strongly suggest unlocked bootloader + custom rom and kernel. oh and also, grab better battery stats app, it shows an easier-to-understand overview when compared to apps you used
Flying_Bear said:
that's... waaaaaay too much. why are you on ICS anyway?
my suggestion is - factory reset from stock recovery (warning: your internal sd card will be fully formatted). in case you don't care about ICS, i strongly suggest JB. if you don't care about voiding warranty, i strongly suggest unlocked bootloader + custom rom and kernel. oh and also, grab better battery stats app, it shows an easier-to-understand overview when compared to apps you used
Click to expand...
Click to collapse
Thanks for such a quick reply.
I'll tell you the scenario, as quick as i can make it.
had the phone 2 weeks, got it on a 24mnth contract ( i know, sigh)
anyway, updated it to JB (4.1.2?) through LG pc suite, but thought the battery life seemed to be worse, so i downgraded with LG flash tool, to ics.
after a F/reset, i rooted, then F/Reset again, but it seemed sluggish.
the long and short of it is, ive gone up to JB twice, and down to ICS twice, rooted and unrooted twice, disabled a whole HOST of stock bloatware, and am still left with similar results as posted in the pics.
ATM ive a clean ICS and im at a loss as to what to do. ive been reading all the threads about improving battery, culling the bloatware apps etc before i decided to post.
as for bootloader, i will probably do that sometime in the future, when im more knowledgeable on the subject. at present, i dont want to be left with a 2 year contract to a brick
thanks again,
ps: you say better battery stats is better than battery stats plus?...will download now, thanks
Sun
interesting situation. it's strange that sluggishness persisted between factory resets and .dz flashes back to 10x version.
first off, how does the phone behave when you're not using it? is it draining battery bad? is it going into deep sleep? what are the percentages of cpu states (you can check this in better battery stats, as battery stats plus seems to be too clunky for me to read proper info)?
if it's deep sleeping properly, then yeah, the issue is with something sucking up the juice while screen is on. next off, check cpu states - if it's locked at 1.5ghz often, when you have screen on but doing nothing, it's significant info.
what i've noticed with display, you can count up to 3:30 hours of onscreen time with stock rom (this is with very conservative use of wifi and data during this period, and no heavy gaming for example) - that's around 200 minutes of on screen time, meaning you should get around 2 minutes of screen on per 1% of reduction in battery - how far are you from this result?
i hope we manage to get to the bottom of this, but i still recommend unlocking bootloader and flashing custom kernel and/or rom. you can't really brick o4x while unlocking bootloader afaik, and you've done more complex operations when switching from 20a to 10h than bootloader unlock is.
I would go the other way to be honest. If you do a full factory reset, install no apps, no Google account or anything and still get a similar problem with the battery drain then I would take the phone back for replacement as that is abnormal.
No point running a risk with your warranty when might be a hardware fault.
It's midnight here now so can't really test it till.morning now. When phone is in standby, it seems to hold.its juice ok. I'm sat here now, with nothing switched on except WiFi, screen at 23% brightness , and am just using tapatalk and I'm getting 2-3 mins per 1% screen. Less if I play in the menus. First thing tomorrow, I'll reset the phone again, before dl'ing any apps. Then I'll only download BBS and see how I get on. I'll also.monitor battery loss over night.
Sent from my LG-P880 using Tapatalk 4
edit:
after i wrote the above last night, i decided to watch a movie on my phone in bed.(headphones, dont wanna disturb the missus ) and i managed to watch a movie of 2hrs 10 mins, with 23% battery drain, on stock video player, yet just browsing through the phones menus/ light web surfing, eats the juice like crazy.
left phone off charge over night, and didnt even have a 1% drop in 7 hours (wifi off,sync off, data always off(dont use it)) and phone set to 2g mode
Sun
current set up
Right,
I've performed another F/reset, and rooted. Installed TB pro, and uninstalled/frozen a skew of apps/services as listed per the thread in my sig.
Installed better battery stats, charged phone to 100% took off charge, and am just waiting to see how it goes now. Would you recommend using phone as normal while BBS collects its info, or to let the phone alone for a while?
thanks again,
Sun
SunHounD said:
Right,
I've performed another F/reset, and rooted. Installed TB pro, and uninstalled/frozen a skew of apps/services as listed per the thread in my sig.
Installed better battery stats, charged phone to 100% took off charge, and am just waiting to see how it goes now. Would you recommend using phone as normal while BBS collects its info, or to let the phone alone for a while?
thanks again,
Sun
Click to expand...
Click to collapse
you can leave it alnoe during night to check if it deep sleeps properly, right now you're interested in cpu states option in bbs, to see if it uses too much cpu when doing normal tasks such as surfing, reading, watching/listening media etc. your goal is to get over 2 mins per 1% drain (in the end, over 3 hours of onscreen time with no heavy gaming). with those stats, your can say that your phone is draining normally, just that lg reports stupid stuff (f.e., stock roms report screen as using 20% of the battery, while in reality screen is using waaay more, the most actually)
Thanks Flying_Bear, I'll refrain from doing any more resets etc for the rest of the day, see how the readings progress and post on that tomorrow, after overnight analysis.
This piece of one of your previous posts just stuck in my mind:
Flying_Bear said:
i hope we manage to get to the bottom of this, but i still recommend unlocking bootloader and flashing custom kernel and/or rom. you can't really brick o4x while unlocking bootloader afaik, and you've done more complex operations when switching from 20a to 10h than bootloader unlock is.
Click to expand...
Click to collapse
TBH, from everything I've been reading on it, it kind of scared me off the subject, but to see you say it was less complicated than what I've already done, has got me to thinking.
The biggest thing for me at the minute, before considering that, it to rule out faulty hardware. At least if thats the case, i still have warranty intact.
Is the performance increase really that noticeble after flashing custom kernels/roms?
Thanks again for your time,
Sun
no.
apart from everyone here praising custom roms and kernels, DON'T flash a custom rom, when you are concerned about battery.
the best rom out there regarding battery life is by far a stock rom, be it 4.0.3 or 4.1.2.
the worst thing about the custom roms is WiFi. with stock i was able to let WiFi run through the night with less than 1% loss per hour.
on every custom rom my battery needs at least 5% per hour for WiFi, but most of the time even more. its just not useable.
shortly followed by 3g network, which has a much bigger battery drain than stock, too.
i am on CM and different kernels for some month now and i consider going back to stock, because i want to leave WiFi on in the night, otherwise my phone eats up my 100MB free 3G traffic way too fast.
BUT...
the reason for your battery hungry phone is not the ROM, the kernel or the phone itself.
your battery drain is absolutely absurd for stock ROM and can only be caused by badly programmed apps you have running.
OR:
you have your phone relatively new and play with it EVERY FRICKIN MINUTE, which would be an explanation, too.
you said, you were able to watch a whole 2h movie with only 23% loss, that sounds like the stock ROM i know. on custom you would lose around 50% for this. but when your phone loses battery when you "play with the launcher", you maybe have installed a 3rd party launcher, that eats your power, are using facebook/skype/whatsapp/(insert any other badly coded program, that has no push mode), or have just fiddled with the developer settings a bit too much.
Because you noticed your battery drain with 4.1.2, too, then i suspect a badly coded app. these are the reason for nearly every battery drain (and the reason for wakelocks, too) apart from bad drivers in custom kernels, like the WiFi desaster all the custom rom users have here.
I think the only reason I would consider custom roms, is a performance increase.... If it wont give me one, then I see no point in going down that route.
LamerDuck said:
i am on CM and different kernels for some month now and i consider going back to stock, because i want to leave WiFi on in the night, otherwise my phone eats up my 100MB free 3G traffic way too fast.
Click to expand...
Click to collapse
Totally agree, its why I refuse to enable data in the first place.
the reason for your battery hungry phone is not the ROM, the kernel or the phone itself.
your battery drain is absolutely absurd for stock ROM and can only be caused by badly programmed apps you have running.
Click to expand...
Click to collapse
when I took the original screenies, in OP, I didnt really have much in the way of apps on it. I'd not long before done a clean flash, then removed some of the bloatware that came with it.
OR:
you have your phone relatively new and play with it EVERY FRICKIN MINUTE, which would be an explanation, too.
Click to expand...
Click to collapse
At first yes... hey it was a new toy at the time. Novelty wore off about day 3 though.
you said, you were able to watch a whole 2h movie with only 23% loss, that sounds like the stock ROM i know. on custom you would lose around 50% for this. but when your phone loses battery when you "play with the launcher", you maybe have installed a 3rd party launcher, that eats your power, are using facebook/skype/whatsapp/(insert any other badly coded program, that has no push mode), or have just fiddled with the developer settings a bit too much.
Click to expand...
Click to collapse
yeah, it handled a movie quite well, I was quite pleased with this. When i said messing with the menu, I just meant exploring the phone; no custom/3rd party launchers, no messing with Dev stuff.
At the minute now, the only extra apps on my phone are XDA Dev app, tapatalk4, BBS, TB-pro and root uninstaller pro.
Oh, and can I ask.... aside form the ability to "pimp" your phone out, or the extra customization, is there any benefit to flashing custom roms? As it cant be for better performance....
thanks
Sun
LamerDuck said:
no.
apart from everyone here praising custom roms and kernels, DON'T flash a custom rom, when you are concerned about battery.
the best rom out there regarding battery life is by far a stock rom, be it 4.0.3 or 4.1.2.
the worst thing about the custom roms is WiFi. with stock i was able to let WiFi run through the night with less than 1% loss per hour.
on every custom rom my battery needs at least 5% per hour for WiFi, but most of the time even more. its just not useable.
shortly followed by 3g network, which has a much bigger battery drain than stock, too.
i am on CM and different kernels for some month now and i consider going back to stock, because i want to leave WiFi on in the night, otherwise my phone eats up my 100MB free 3G traffic way too fast.
BUT...
the reason for your battery hungry phone is not the ROM, the kernel or the phone itself.
your battery drain is absolutely absurd for stock ROM and can only be caused by badly programmed apps you have running.
OR:
you have your phone relatively new and play with it EVERY FRICKIN MINUTE, which would be an explanation, too.
you said, you were able to watch a whole 2h movie with only 23% loss, that sounds like the stock ROM i know. on custom you would lose around 50% for this. but when your phone loses battery when you "play with the launcher", you maybe have installed a 3rd party launcher, that eats your power, are using facebook/skype/whatsapp/(insert any other badly coded program, that has no push mode), or have just fiddled with the developer settings a bit too much.
Because you noticed your battery drain with 4.1.2, too, then i suspect a badly coded app. these are the reason for nearly every battery drain (and the reason for wakelocks, too) apart from bad drivers in custom kernels, like the WiFi desaster all the custom rom users have here.
Click to expand...
Click to collapse
yeah wifi can drain too much, but i had almost same stats on custom as on stock - 3-4% per hour if wifi is left on, with sync on and push notifications and blabla. you've got things going great if you have 1% per hour with wifi on.
lg has crammed up a whole lot of **** inside their stock rom - apart from useful stuff like proper mhl drivers, quickmemo, nice gallery & video apps, it's bloated to hell - mlt logging, ****ty launcher (imo), widgets that only work on stock launcher, "smart log service", RIDICULOUS throttling etc). you can root and uninstall most of these, but even then you might not get what you're looking for.
my best onscreen time on stock 4.1.2 20a/20b was 3 hours 3 minutes. that's with conservative use of wifi, 3g and almost no gaming. on custom rom & kernel, today i pumped out 3 hours 37 minutes, and was on 17% battery, when i plugged it in in order to recharge it. that was an obvious increase for me (keep in mind there were custom rom/kernel combinations that had me pulling barely 2 hours onscreen time).
you need unlocked bootloader for custom kernels, and say what you say but proper kernels ARE battery savers and performance enhancers. stock kernel has for some people insane issues with baseband_xmm wakelock (for me it was rediculous, 6% per hour drain when not using a phone and no deep sleep at all) and wipes didn't help with that; only custom kernel fixed it. it has RIDICULOUS (for emphasys) throttling effect, slowing your cores down to 1ghz each when battery hits 43 degrees celsius (which for me was around 20 seconds of normal usage on a hot day outside), which leaves you crippled if you're planning on doing any complex action with your phone.
alternative is - unlock bootloader, check custom roms and see if you like'em (Zaiben is f.e. debloated and improved stock, something OP might like, or he can go cm, or carbon or any other if he prefers custom features). if you don't, it's easy to flash a .kdz file back.
Flying_Bear said:
yeah wifi can drain too much, but i had almost same stats on custom as on stock - 3-4% per hour if wifi is left on, with sync on and push notifications and blabla. you've got things going great if you have 1% per hour with wifi on.
lg has crammed up a whole lot of **** inside their stock rom - apart from useful stuff like proper mhl drivers, quickmemo, nice gallery & video apps, it's bloated to hell - mlt logging, ****ty launcher (imo), widgets that only work on stock launcher, "smart log service", RIDICULOUS throttling etc). you can root and uninstall most of these, but even then you might not get what you're looking for.
my best onscreen time on stock 4.1.2 20a/20b was 3 hours 3 minutes. that's with conservative use of wifi, 3g and almost no gaming. on custom rom & kernel, today i pumped out 3 hours 37 minutes, and was on 17% battery, when i plugged it in in order to recharge it. that was an obvious increase for me (keep in mind there were custom rom/kernel combinations that had me pulling barely 2 hours onscreen time).
you need unlocked bootloader for custom kernels, and say what you say but proper kernels ARE battery savers and performance enhancers. stock kernel has for some people insane issues with baseband_xmm wakelock (for me it was rediculous, 6% per hour drain when not using a phone and no deep sleep at all) and wipes didn't help with that; only custom kernel fixed it. it has RIDICULOUS (for emphasys) throttling effect, slowing your cores down to 1ghz each when battery hits 43 degrees celsius (which for me was around 20 seconds of normal usage on a hot day outside), which leaves you crippled if you're planning on doing any complex action with your phone.
alternative is - unlock bootloader, check custom roms and see if you like'em (Zaiben is f.e. debloated and improved stock, something OP might like, or he can go cm, or carbon or any other if he prefers custom features). if you don't, it's easy to flash a .kdz file back.
Click to expand...
Click to collapse
Hi Flying_ Bear, can you pl confirm what combo of rom and kernel is giving you 3 hr 37 min of screen on time and which ones to avoid (ones that gave you 2 hrs)?
Carbon rom 4.2.2 version with iodak v7 had the best onsceen. Id say stock was worst, 2hrs 45mins of onscreen with no gaming and low brightness, with stock kernel

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