Database Users

[FIX] Battery Stats Issues!

Ok After some tinkering I was able to fix Battery stats issue and actually find out a possible reason for battery stat issues pitfalls and random shutdowns.
Here are the Steps I got working after my battery reported wrong stats and huge pitfalls with Random Shutdowns. Fix is pretty simple but needs a bit of patience so here goes:
Note: I tried this on Overcome ROM 1.4.2 with 2.1.2 overcome kernel. Some users report that new Asian Firmware in GSM development section has this issue solved.
First: follow the instructions below to get a fresh new battery stats and recalibrate the battery.
alterbridge86 said:
If you have Battery Life issues, try this first:
Turn the Tab off and charge to 100%
Unplug from charger and immediately boot into recovery by holding volume up & power button
Navigate to Advanced
In the Advanced menu, choose Wipe Battery Stats
Reboot Tab normally and Enjoy a freshly calibrated battery
NOTE - Having the tab off is important...I notice that even if I charge to full while tab is on, once I turn it off it continues charging for another 10 minutes or so before hitting 100%. I believe the sensor determining what is a full battery is different in the off position and will allow you to get the fullest charge.
Click to expand...
Click to collapse
(credit to alterbridge86 and original poster).
Second: Use the tab till its fully drained (you may experience random shutdown and pitfalls keep rebooting it till its COMPLETELY DEAD. We need a full drainage to obtain a charge Discharge Cycle. Press the power button to force any charge out and make sure the tab battery is completely out.
Third: Repeat the The Charge/Discharge cycle (mine worked after the 3rd time). You should experience improved battery stats with each cycle until all issues are gone.
As for the possible reason for the Battery stats issue I am suspecting USB charging from computers when we use the tab with PCs to sync or copy or flash ROMs on the tab (I started having those issues after tab was on laptop for the whole day as I was trying new ROMs and flashing overcome). I wonder if there is a way or script to disable USB charging. I could be wrong so feel free to correct me if I am
I hope this helps!

has anyone else here tried this method?
any success?
right now im trying the first part. let you guys know when its done.

just fully charged my tab.
got into samsung recovery. but cant find calibrate battery anywhere.
just
reboot system now
apply sdcard:update.zip
wipe data/factory reset
wipe cache partition.
help
did the wipe cache.
hopefully this does the job

he was talking about the custom rom though , you can wipe the battery status .
there is app in the market called barry calibration for free you may wanna have a look into it

You can find it under Advanced tab in recovery, wipe Battery Stats.
milkboy007 said:
just fully charged my tab.
got into samsung recovery. but cant find calibrate battery anywhere.
just
reboot system now
apply sdcard:update.zip
wipe data/factory reset
wipe cache partition.
help
did the wipe cache.
hopefully this does the job
Click to expand...
Click to collapse

when i unplug my tab the level immediatly goes to 99%.
I've tried to calbrate but the problem is still there.
Any solution?
thanks in advance

sadly i use the stock rom.
oh well hopefully 2.3 upgrade fix the issue

The Solution
milkboy007 said:
sadly i use the stock rom.
oh well hopefully 2.3 upgrade fix the issue
Click to expand...
Click to collapse
milkboy007, consider your self lucky that I'm here to help you with a problem that faced me for over a month and i finally fixed it, which is exactly your problem, forget about all the non sense these people say about calibrating the battery or changing roms its all waste of time, here is the real solution open the tab and remove the battery let it settle down for 30 min and hook it back in and close your tab and you will be a happy tab owner again, i know it is hard to believe even for me at first i tried all the other methods the guys said with no hope, but now I'm really happy with my tab again, you need a tri wing screw driver and some other plastic case opener to open it for me i used a regular screw driver but be careful from scratching your case while opening it, here is a link on how to open it and other link for guys who had the guts to do it and telling what they experienced
http://www.ifixit.com/Teardown/Samsung-Galaxy-Tab-Teardown/4103/1
http://www.youtube.com/watch?v=urGUKerJOhg
http://forum.xda-developers.com/showthread.php?t=986067&page=3

battery draining too quick

hmmm i don't get it:
after doing a successful flash according to virnik0's procedure http://forum.xda-developers.com/showthread.php?t=818556 everything was fine - for a couple of weeks or so..
battery would last for days and days just in standby - then suddenly it started to run down pretty quick - now it lasts not even 24 hours - and that is even without any usage at all - just lying there on my desk - idle..
i have absolutely nothing running - no wireless - no programs running - only the mobile network connection - all other programs stopped..
i even bought a new battery - but same problem - less than 24 hour standby on idle.. not even making 1 telephone call..
i also tried resetting the battery..
would it help to do a complete re-flash?

My first guess would be, that you installed / updated an app which goes crazy now.
You can rule out every app that is preinstalled, from google or commonly used (such as titanium backup) .
You can try to uninstall these apps one by one and see if the drain persists.
If so I'd flash a full ROM without installing additional apps. After that you'll have to wait 2-3charges until the battery indicator is accurate again. If the drain is still there it could be a hardware problem.
I think reflashing will fix the issue but don't hold me to it
good luck

captainskywave said:
hmmm i don't get it:
after doing a successful flash according to virnik0's procedure http://forum.xda-developers.com/showthread.php?t=818556 everything was fine - for a couple of weeks or so..
battery would last for days and days just in standby - then suddenly it started to run down pretty quick - now it lasts not even 24 hours - and that is even without any usage at all - just lying there on my desk - idle..
i have absolutely nothing running - no wireless - no programs running - only the mobile network connection - all other programs stopped..
i even bought a new battery - but same problem - less than 24 hour standby on idle.. not even making 1 telephone call..
i also tried resetting the battery..
would it help to do a complete re-flash?
Click to expand...
Click to collapse
I am having the same issue. My battery after flashing 2.3.3 JVK was fabulous. now it is not even lasting for a complete day with no wifi and 3g.
I guess i did wipe the battery stats , after which i am getting these crazy values. I am going to wipe the battery stats after my phone is fully charged and see if anything happens.
i guess there is a guide somewhere in these forums that we have to complete recharge, do a wipe and completely discharge and do a wipe again. please have a look at Battery issue threads in XDA.
Hey, check this thread, there are some interesting observations.
http://forum.xda-developers.com/showthread.php?t=1021711

I don't really believe in wiping the battery stats. They have to be rewritten and that also takes time and gives confusing values in the mean time. Just using the phone normally and always discharging as low as possible while always charging full is my approach.
With JVK it's another story, I think no one knows exactly what causes the drain. it could be the update but I also suspect the gallery, I overwrote the gallery3D.apk with a 2.2.1 version and the drain seemed to disappear. But that's not even a observation, more a feeling since I flashed an restarted several times in the past days since I flashed JVK so I'm more or less just trying a lot at the same time and hope something works

Thank you theduckking - yep did that too - uninstalled all apps not needed but still draining too much - so I am inclined to re-flash..
So you say I can try just reflash ROM - is that also via ODIN? and how do I know which ROM to flash and what it is called?
lycan_codex - yep I did do a battery re-set also in recovery mode - following the procedure from another post - didn't help either

I recommend Odin.
It doesn't really matter which ROM, you could take darky's resurrection edition to have a minimal odin rom.
but flashing a romkitchen (wipe) rom through CWM should also do the job
or you head over to [Ramad]'s thread choose a stock odin firmware (some scrolling required) and flash that.
If you find, that the drain is fixed after installing a minimal rom, you can flash a bigger/fuller ROM over it through CWM and customize it and live happily ever after.

[Q] Flashing ROMs and battery life

Ever since I started trying different ROMs, I've been getting poor battery life. I started with Iced Glacier and just assumed the battery issues were due to the overclocking. Then I tried CM7 Nightly Build 60, which had major issues for me, particularly with battery management. Now I'm running Royal Glacier with Faux's undervolted kernel. I would have thought the undevolting would help, but not so much. Any suggestions for a noob?

You could use an app like SetCPU to underclock your CPU and/or try another ROM. I get great battery life on eViL's Desire HD port. It also has pure Sense (a much nicer UI in my opinion than plain Android and mySense).

TeeJay3800 said:
You could use an app like SetCPU to underclock your CPU and/or try another ROM. I get great battery life on eViL's Desire HD port. It also has pure Sense (a much nicer UI in my opinion than plain Android and mySense).
Click to expand...
Click to collapse
CM7 has built in controller under Performance for that. But if your using Faux's kernel you might want to check the clock frequency as his regular max is 1113mhz. I suggest you download the new CFS2.6.1LV kernel of his and run it. You may want to underclock to min:256mhz/max:768mhz and using smartass gov. When you are done and time you may also properly recalibrate your battery by flashing the battery stats from CWMR (easy) or by removing it manually from terminal (also easy simple rm command).
Now since I flashed new radio when CM7NB60(AOSP2.3.4) came out my data will be useless to you since it can mean its radio related. Only you can compare so if its still problem you may want to flash the new radio also and see if it gives you better battery life along with signal reception.

Also you might try wiping your SD card (backup of course) when you flash a rom, I've noticed that helped me a few days ago when I wiped my sd and reloaded the Sense 2.3.3 leak. Battery life has increase dramatically!

@TmpUsr, could you give me a rundown of properly recalibrating the battery via CWMR? Thanks for everyone's responses.
Sent from my HTC Glacier using XDA App

Sure why not use my old meth I posted here under this very same section.
Well the borderline idea is the same as you already know you have to completely drain it. Now never use any volt meter those people use to completely discharge it as the negative effect I already explained to you in that post. So best way is to do it by recalibrating so what you do is:
1) Fully charge it.
2) Drain it till you get 1%.
3) Go in recovery and wipe battery, reboot (batterystats.bin created).
4) As you still have battery low now let it charge till 100%.
5) Do the cycle again.
NOTE: This is what I would recommend but as we know the whole issue with CWM restarting while phone is off as you can flash the stock recovery and go back as it takes 3sec. If not follow the above.
1) Heavily use your phone so it drain the battery till its 1%
As you will see the low battery light flashing just so you don't lose your data save it by rebooting.
2) As you still have some battery power left you can now go to Recovery and wipe battery stats.
Or you can manually do it from adb shell by using remove command "rm /data/system/batterystats.bin".
3) Keep it on till its turns itself off.
As you may have guessed it still has power left so keep using the device till its drained completely I would recommend rebooting and going in bootloader as it uses more power due to bight screen as Recovery uses less power on display.
4) Now turn it back on again in bootloader till it turns off again.
It will keep turning itself of as no power left, this is what you want. This is safe way to discharge it without having negative adverse effect.
5) Now let it charge via A/C instead of USB.
Now when the light turns green unplug it and replug it till its green again, keep doing that till you see its green only. Now once you reboot in Android it will rebuild the batterystats.bin and you will be fully recalibrated.
Click to expand...
Click to collapse
Just ignore the part about CWMR post-3.0.0.6 issue was before we were not able to charge it unless we used stock recovery as it would just simply restart.

Thanks. I tried an abbreviated version of that this morning (before reading your post). I charged all night as usual, then first thing this morning turned it off, pulled the battery (hadn't done that since flashing the ROM), then booted into clockwork recovery and wiped battery stats. It's currently almost 9pm and I'm at 52% with light use (though the first half of the day was spent in a poor signal area). If it gives be further trouble, I'll do the whole song and dance above.
Now if I could just figure out why my email and push alerts won't work.
Sent from my HTC Glacier using XDA App

U can also install battery calibration frm market place which does the same as goin in recovery & wipin battery stats....
Mytouch 4g-White
Permrooted s=off
Root Method-gfree
CWR-3.0.2.4
Rom-Royalginger v2.0

Battery Issues SOLVED!- New Solution...after I tried many..this works!

Hi all;
so over the last few months i have flashed many custom roms, kernels etc...and always had battery issues...i have tried jugs battery fix, wiping battery stats..following many other battery optimization threads..but i never got the battery life i once had (when i first bought my phone)...
a few days ago my phone totally crashed..wouldnt charge etc..and i ended up having to do a complete restore..i did this by following these instructions
http://www.youtube.com/watch?v=hRFJJFW-XxI
....so from there, i unlocked again, reloaded CWM etc and i loaded 2.3.4 flashable zip (found in the forums) via CWM.
and voila..battery life AMAZING....after 8hours im usually still at 85%...by evening time after using the phone all day im still at about 60%
from here do what you want with roms..
i loaded the alien rom without adding the themes..and the battery life is as stated above..
so if you are having issues try hard resetting the phone then re unlocking the BL and upgrading via cwm to 2.3.4
my battery life i back to amazing.....
p.s. would be great if someone else who is having issues tried this and reported back as well...
p.s. this worked for me but i am not responsible if you mess up your phone!

Erm..
Ok Ill bite >,>
Where are these camera buttons your referring to in this guide of yours Atrix has three hard buttons and four soft buttons power, vol- and vol+ and menu home back and search.... you hard mod a camera button into this already packed phone Ill like to hear it XP

Interesting..
Couple of q's:
- which camera button?
- unlock bootloader again? Once unlocked it stays unlocked.
- I don't understand how doing a reset leads you to unlocking the bootloader again?
Sent from my Motorola Olympus using XDA Premium App.

updated the hard reset instructions to reference a youtube video (not mine but describes how to do it)
http://www.youtube.com/watch?v=hRFJJFW-XxI

it doesn't actually re-lock the bootloader. The BootLogo is replaced with the stock logo, which does NOT include the "UNLOCKED" in the upper left hand corner

sorry i didnt realize that..so skip this step for anyone that is going to try it...
jakew02 said:
it doesn't actually re-lock the bootloader. The BootLogo is replaced with the stock logo, which does NOT include the "UNLOCKED" in the upper left hand corner
Click to expand...
Click to collapse

well dont have the old recovery and even if i did cant read the things at all quality is very bad

me too really can't understand it properly, i need to get back that battery time, but How? can anyone else explain it Please?

Anyone except TC try this with sucess? I have Alien 4 with stock kernel and i am getting about 15 to 20 hours before death.

I could be wrong, but I'm fairly confident that the following information is correct:
Doing a factory reset on the stock android recovery simply wipes data, cache, and dalvik - all of which can be done with any of the after market recoveries.
I am unsure as to whether or not factory reset also wipes the battery stats in the stock android recovery.
Edit: It is highly recommended to wipe the battery stats after you install a new ROM or kernel. To do so the quick and easy way - charge the phone to 100%, reboot to recovery, clear battery, reboot. If is then recommended that you let the phone die (or at least get low) followed by a full charge 2-3 times to make the battery accurate. The most involved way to reset the battery stats is to charge to full with the phone off. When it says 100%, pull the battery, plug it back in, let it charge for an additional hour or two while still off like this. It will likely not show 100% after an hour or two, that's fine. Boot into recovery, wipe stats, start up the phone, then unplug it. Follow this will drains and full charges 2-3 times and you will be set. This helps to fix poor battery life when it is caused by a battery that will not fully charge.
OP you should try to drain the battery down to nothing. A lot of people who screw up their battery stats end up with bad battery, however at times you can get a very slow draining batter that will give you 20 hours with 60% left, and then when the phone hits 53% (random example), the battery will fall from there to dead in just a few minutes. This happened to me when I first flashed Ninja SF. I was amazed the battery until I decided to let the phone actually die.
DK

Well im on Cm7 so far only 48% left after 18 hours of moderate use
Sent from my MB860 using xda premium

hi i did try what you said below and it didnt give me the same results...
DeathKoil said:
I could be wrong, but I'm fairly confident that the following information is correct:
Doing a factory reset on the stock android recovery simply wipes data, cache, and dalvik - all of which can be done with any of the after market recoveries.
I am unsure as to whether or not factory reset also wipes the battery stats in the stock android recovery.
Edit: It is highly recommended to wipe the battery stats after you install a new ROM or kernel. To do so the quick and easy way - charge the phone to 100%, reboot to recovery, clear battery, reboot. If is then recommended that you let the phone die (or at least get low) followed by a full charge 2-3 times to make the battery accurate. The most involved way to reset the battery stats is to charge to full with the phone off. When it says 100%, pull the battery, plug it back in, let it charge for an additional hour or two while still off like this. It will likely not show 100% after an hour or two, that's fine. Boot into recovery, wipe stats, start up the phone, then unplug it. Follow this will drains and full charges 2-3 times and you will be set. This helps to fix poor battery life when it is caused by a battery that will not fully charge.
OP you should try to drain the battery down to nothing. A lot of people who screw up their battery stats end up with bad battery, however at times you can get a very slow draining batter that will give you 20 hours with 60% left, and then when the phone hits 53% (random example), the battery will fall from there to dead in just a few minutes. This happened to me when I first flashed Ninja SF. I was amazed the battery until I decided to let the phone actually die.
DK
Click to expand...
Click to collapse

Y u no sleep? help me, thanks.

Hello, i'm currently with quarx CM10 last build (2 nov). First time i installed it i noticed it help A LOT with battery consumption.. from 12 midnight till 10 am from the other day it went from 99 to 97... that is.. like a miracle. then i did something stupid.. i used "battery calibrator" and it ruined it. Today it wen from 12 to 10 am in the morning with 99 to 60 then 49 (typical battery jump)...
I repeat, it's in the night, were wifi is off, refresh is off and nothing (that's what i'm planning to discover) is running or updating.
I attach some screens.
1) first install of the new rom. you can see it sleeps like a baby.... plain.
2).. goes down.. and down... even though i'm not using it.
any comments, help or suggestions? thanks in advanced!

missgothika said:
Hello, i'm currently with quarx CM10 last build (2 nov). First time i installed it i noticed it help A LOT with battery consumption.. from 12 midnight till 10 am from the other day it went from 99 to 97... that is.. like a miracle. then i did something stupid.. i used "battery calibrator" and it ruined it. Today it wen from 12 to 10 am in the morning with 99 to 60 then 49 (typical battery jump)...
I repeat, it's in the night, were wifi is off, refresh is off and nothing (that's what i'm planning to discover) is running or updating.
I attach some screens.
1) first install of the new rom. you can see it sleeps like a baby.... plain.
2).. goes down.. and down... even though i'm not using it.
any comments, help or suggestions? thanks in advanced!
Click to expand...
Click to collapse
Make your phone recalibrate the battery. Follow the following steps:
1 Use the phone till you have 10% or less battery left.
2 Wipe battery stats from 2ndinit recovery.
3 Boot into CM10.
4 Charge your battery to 100%.
Doing this will make the phone generate a new battery stats file and should solve your problems.

krushnam said:
Make your phone recalibrate the battery. Follow the following steps:
1 Use the phone till you have 10% or less battery left.
2 Wipe battery stats from 2ndinit recovery.
3 Boot into CM10.
4 Charge your battery to 100%.
Doing this will make the phone generate a new battery stats file and should solve your problems.
Click to expand...
Click to collapse
i'll try that. but already done it when installed the last build for the second time. i do wipe cache / dalvik / batt stats then flash ROM and all over again with the wipes.

missgothika said:
i'll try that. but already done it when installed the last build for the second time. i do wipe cache / dalvik / batt stats then flash ROM and all over again with the wipes.
Click to expand...
Click to collapse
If you've uninstalled your battery calibrator app or if you've not used it after the wipe, then you shouldn't have any abnormal battery drain...
If wiping battery stats doesn't work, then most people recommend reflashing the ROM, but you've already done that, so you shouldn't have the battery drain now.
Just put your phone to sleep for a few hours, and let's see what happens after doing that.

This is what i did after seeing the sudden drop the other night:
- let it drain normal till the day finishes (at midnight, that's when i did the following)
- charged the battery to 100% and turn off phone.
- pull battery., connect charger to wall and recovery.
- install ROM without battery on. Wipe cache, dalvik, stats batt, install rom, wipe cache, dalvik and statts (again)
- boot into cm10, turn off screen and went to sleep.
- THIS morning, i saw it drained me up to 60 all night.
...
so as you can see.. i've already seen that after reflashing nothing has happened.
no, i didn't use again the calibrator.

missgothika said:
This is what i did after seeing the sudden drop the other night:
- let it drain normal till the day finishes (at midnight, that's when i did the following)
- charged the battery to 100% and turn off phone.
- pull battery., connect charger to wall and recovery.
- install ROM without battery on. Wipe cache, dalvik, stats batt, install rom, wipe cache, dalvik and statts (again)
- boot into cm10, turn off screen and went to sleep.
- THIS morning, i saw it drained me up to 60 all night.
...
so as you can see.. i've already seen that after reflashing nothing has happened.
no, i didn't use again the calibrator.
Click to expand...
Click to collapse
I'm not 100% sure, but as far as I remember, the battery stats gets generated while CHARGING a drained battery.
That's why you should drain the battery, wipe stats and THEN charge it to 100%. As it charges, the battery sensor detects levels (15, 30, 60 and such I think) and generates the battery stats based on these readings.
Afterwards, based on these stats, it generates a reading of battery drain, as the battery sensor itself senses only certain levels.
So, drain, wipe and THEN charge. Do this and let me know if the problem still persists.

krushnam said:
I'm not 100% sure, but as far as I remember, the battery stats gets generated while CHARGING a drained battery.
That's why you should drain the battery, wipe stats and THEN charge it to 100%. As it charges, the battery sensor detects levels (15, 30, 60 and such I think) and generates the battery stats based on these readings.
Afterwards, based on these stats, it generates a reading of battery drain, as the battery sensor itself senses only certain levels.
So, drain, wipe and THEN charge. Do this and let me know if the problem still persists.
Click to expand...
Click to collapse
hmmm! never tried that!.. i was just charging it and it's in 90.. so i'll let it drain and tell you later thanks for that suggestion.
Still open to other comments though thanks to everyone who reads this.

https://plus.google.com/u/0/105051985738280261832/posts/FV3LVtdVxPT
Just read and engrave to your memory folks! Battery calibration never ever had a positive effect on the battery life and the battery usage shown in the android in-built "Battery Use"-app... and by the way, the stats are reset every time you unplug your nearly fully charged phone from the cable.

Hey, rather than blaming your battery stats I'd search for a process running all the time. Looks like something is keeping the phone awake.
The battery calibration IS A MYTH, as explained here, so don't waste your time wiping the values in Recovery. If you don't find any hyper-active processes with the following procedure, the drops might be related to a worn battery (I don't know how old your phone/battery is).
Open a terminal console and type:
$ top -n 1|head
(if you don't have Hacker's Keyboard installed and selected as Input Method you might need to copy and paste the line above, off course without the dollar sign).
Look at the processes listed as output and paste them here.

slimshady76 said:
Look at the processes listed as output and paste them here.
Click to expand...
Click to collapse
Hola slim , thanks for answering. here's the screen

You had it coming since you are using Swipe... It's chewing up your CPU, and consequently your battery. Search the site. Off the top of my head I think it was a common issue.

slimshady76 said:
You had it coming since you are using Swipe... It's chewing up your CPU, and consequently your battery. Search the site. Off the top of my head I think it was a common issue.
Click to expand...
Click to collapse
Swype? really?? shoot.. i love it.. even though i don't use it that much. Searched a bit but couldn't find much. Gonna try freezing it and see what happens. thanks.

Finally i managed with your help to accomplish some good sleep! here's the screen. i think it's awesome, never ever seen this.
thank you!!
we'll see if it gets better.

There's an interesting lesson to be learned here: if no deep sleep can be achieved, don't blame the ROM, and look for a stubborn process which refuses to stop when the kernel tell is to.