Develop Bugs

[Q] Wipe Battery Stats

Hey,
I have problem. I wiped the battery stats in Recovery mode like this one thread said to do, if experiencing battery problems. And since then, when I reboot my phone, it won't boot...only that white HTC screen displays. Nothing else happens. I always need to reflash my rom for my phone to boot into android. Any ideas???

DonJuan89 said:
Hey,
I have problem. I wiped the battery stats in Recovery mode like this one thread said to do, if experiencing battery problems. And since then, when I reboot my phone, it won't boot...only that white HTC screen displays. Nothing else happens. I always need to reflash my rom for my phone to boot into android. Any ideas???
Click to expand...
Click to collapse
Simply wiping Battery stats shouldn't do that. My concern is the fact that you say you have to always reflash your rom, are you saying that even now if you reboot it will not boot up your ROM? if so I would recomend doing a wipe of /cache and /dalvick-cache and seeing if that helps if not do a full wipe /system /data /cache and /dalvik-cache and reflash your rom but be warned doing that will lose all your data

This might sound obvious, but I am curious how wiping battery stats actually help recalibrating the battery? I do it once and the battery percentage drops to 0% immediate on boot, while there are still plenty of juice left.
What the correct way to properly recalibrate the battery?

Download current widget, charge your phone till current widget shows 0mA, then wipe battery stats.

What changes when you wipe your battery ststs? I've came across a thread for HD2, which said that wiping battery stats in recovery is equivalent to deleting /data/system/batterystats.bin (or something like that) and rebooting. Obviously being WM device the HD2 lacks a recovery. The thread also said that this should increase the maximum voltage the battery reaches while charging (to ~4220mV). With my DHD I reach 4199mV with or without wiping the stats. Also that thread suggested that the minimum voltage (equivalent to 0% battery) depends on the kernel used and could be as low as ~3200mV but all the ROMs and kernels I used can't reach those low voltages (usualy around 3500mV). Can anyone please share his experience with the battery voltages because I think this is the most objective way to measure the effect of wiping the battery statistics.

I wiped my batterystats with CWM in recovery mode and had no problems

battery stats
Hi,
Try to download from market "Battery Calibration".
Install it and plug in your phone to charge it.
Wait untill battery is 100% charged.
Press calibrate battery on the screen.
A popup will show you the result and the App. automatically deletes the file "batterystat.bin".
Than plug off your phone.
Now you are joining a new battery life, more stable and performance than before.
If you also want to have your battery always under control, download currentwidgets and place it on home screen. It will show you how many ampere your battery is consuming.
I hope this post is usefully for you.
Bye

back up battery stats

Is it possible to backup and restore your battery stats? I saw it was a feature on the galaxy s2's hyperdroid rom. It would make things a little easier (yeah i know its not that hard to just charge to 100% and let it drain) but it normally takes a day for that to happen and I can leave in the morning with 20% charge to get me through the day.

havent seen anything on backing this up yet but i much rather prefer to do a calibration after every rom or kernal flash as opposed to having a backup of the stats

PaulG1488 said:
havent seen anything on backing this up yet but i much rather prefer to do a calibration after every rom or kernal flash as opposed to having a backup of the stats
Click to expand...
Click to collapse
I agree with Paul it's best to wipe the battery stats everytime you install a new Rom however if you did want to back them up then use something like Root Explorer and browse to /data/system and make a copy of batterystats.bin

Defy 7.2rc2 battery dips from 36% to 19%.

I have a strange problem. The battery of my defy running cm7.2 RC2 drops directly from 36% charge to 19%..that's a direct drop of 17% charge..and it always happens when it reaches 36%. Not before that..I have tried every method of calibrating battery mentioned on xda but nothing works. can someone help me with this issue
Sent from my MB525 using xda premium

Try and do the battery calibration with available tool from market.
Sent from my MB525 using XDA

OK.. so you have already tried that..
Sent from my MB525 using XDA

aspenboy said:
I have a strange problem. The battery of my defy running cm7.2 RC2 drops directly from 36% charge to 19%..that's a direct drop of 17% charge..and it always happens when it reaches 36%. Not before that..I have tried every method of calibrating battery mentioned on xda but nothing works. can someone help me with this issue
Sent from my MB525 using xda premium
Click to expand...
Click to collapse
I have the same problem with CM9 on a red lensed Defy --30% to 19%--...I tried flashing other kernels (Obviously I've already calibrated the battery) and nothing works..

I have had this on CM9, MS2Ginger (all versions), some people have reported the same behaviour on MIUI. What do they all have in common? Yup - the kernels! Since Defy has locked bootloader, we can only use Motorola's stock Froyo and GB kernels. And now, when I think about it, I start to think the issue might be comming from there and that Moto did know about this bug, that's why stock ROM's don't show battery in 1% steps but in 10 - 'cause then it is hard to notice the huge drop.

Have the same problem to. It seems to be getting worse as well. Drops from about 62 to 49 as well. Also on CM7.2 RC2.

My MB525 also happens this way after about a year's usage. ?battery hardware?
I've tried :
1) wipe battery stats from applications
2) wipe battery stats from 2nd init recovery
3) wipe / format cache partition
4) wipe Dalvik cache
5) restore previous backup (while battery's running OK)
6) calibration of battery using > 3 different apps
7) wipe / format partition using "power" + "vol down" key then goes into the menu
NONE of them work EXCEPT
WIPE AND FORMAT ALL USER AND SYSTEM DATA !
I wonder is there a system bug that could lead to this phenomenon or just hardware malfunction - I recently bought another non-motorola battery BUT it works flawlessly from 100% to 15% till it reminds you to connect to charger.
It happens when I used :
1) stock Froyo 2.2.2 from official motorola site
2) rooted stock Froyo 2.2.2
3) CM7.2 RC2
Now I am using CM7.2 RC2

I confirm that this is happening not only on CM7.2. I have the same problem on stock froyo even after a complete wipe and a full sbf flash.
Moreover I used to have a 34-19% drop but since last week I have also another drop around 62%. It means now that I'm loosing one day of usage!
I really think that the battery is dying. I ordered another one, I will see if it's solving the problem.

I have two batteries, and one of them always drop from 15 to 4. I think is a battery issue.
Sent from my MB525 using Tapatalk 2

try to do a battery calibration when the battery have only 10% left
after that do a "wipe battery stats" from recovery
then reboot and charge it to full
I fix my "drop" in this mode
this could be a rezult of many flashing and instaling diferent roms
hope this work for you too

cool. i jst created a thread yesterday to show same type of bug in MIUI stable GB...
by battery drain suddenly after 46 % the power goes easily.... dnt knw why this happens ....

I use the stock rom, both tried 2.2 (Defy) and 2.3.6 (Defy+)
both have the same problem with moto original battery

Try new Motorola Defy cyanogenmod 7.2 RC3 http://get.cm/get/2wY

The problem still remains with cm7.2 RC3

I have same problem with MIUI, WIUI and White Rabbit on my Defy.

vaserbanix said:
try to do a battery calibration when the battery have only 10% left
after that do a "wipe battery stats" from recovery
then reboot and charge it to full
I fix my "drop" in this mode
this could be a rezult of many flashing and instaling diferent roms
hope this work for you too
Click to expand...
Click to collapse
try this
it must help you
Sent from my MB525 using XDA

vaserbanix said:
try this
it must help you
Sent from my MB525 using XDA
Click to expand...
Click to collapse
Sorry, don't work.

It is a problem of the battery.
I have replaced it with the new one and the problem got solved

fa4hu said:
Sorry, don't work.
Click to expand...
Click to collapse
if you have Defy red/green replace the battd file from system/ bin
with this one
View attachment 1117754
rename it battd(delete.zip)
use rootexplorer.apk to replace it
copy/paste
fix permision and reboot
can do a battery calibration and wipe battery stats again

vaserbanix said:
if you have Defy red/green replace the battd file from system/ bin
with this one
View attachment 1117754
rename it battd(delete.zip)
use rootexplorer.apk to replace it
copy/paste
fix permision and reboot
can do a battery calibration and wipe battery stats again
Click to expand...
Click to collapse
Thank you dude it really works! No more drops from 30% to 19% in my case. I wonder why are CM builds provided with faulty battd file?

My One X's battery meet a problem

two days ago, I flash new rom into my one x,and then batter statue always stop at 54%,so i use wipe battery stats in recovery.now battery always stop at fully,i can't charge it.how can i slove it?

zelsazgh said:
two days ago, I flash new rom into my one x,and then batter statue always stop at 54%,so i use wipe battery stats in recovery.now battery always stop at fully,i can't charge it.how can i slove it?
Click to expand...
Click to collapse
Reflash your rom, sounds like something didn't flash correctly

megarekd said:
Reflash your rom, sounds like something didn't flash correctly
Click to expand...
Click to collapse
I have reflash it , but battery still have problem

Battery percentage problem

Hi
Since i unlock the bootloader, change the kernel and install a custom, the percentage off battery available stay at 85%, i can't see when it decrease.
I try to make a wipe data and cache, wipe dalik...
Nothing change
I try many kernel same...
I re-install the custom rom, same...
Help me please

Try removing the battery for a while, more than five minutes.
If not, try discharging your phone complety, remove the battery and charge without turning on.
And had you wipe the battery stats?

17th_angel said:
Try removing the battery for a while, more than five minutes.
If not, try discharging your phone complety, remove the battery and charge without turning on.
And had you wipe the battery stats?
Click to expand...
Click to collapse
Thank you for your answer, but i already try the first and second solution.
I don't how to wipe the battery stats ?
I'm not sure wiping th battery stat, will change something, i try with two differente battery, one new and one old.
Regards

To wipe battery stats you go to the cwm, and search the option, it is usually in the same place that the dalvik cache.
Hmmm did you try flashing another rom? Not the same, or there are a lot of custom battery mods in the apps/mod section if the problem is solely related to the stats. And, i dont know if it can do anything but there is a bug-fix file related to 0% battery problem, again i dont know if it can solve your problem but at least you can try.
The other option is to relock the bootloader and use pc companion to repair your phone.
Did your problem start right after flashing that rom or it took a while?
Sorry if i cant be of any help.

By right wiping battery stats is not necessary since it's wiped every time you switch the phone off...
And yes, please try this with another ROM and see if you get the same results.
僕のLT18iから送られてきた

popthosegaskets said:
By right wiping battery stats is not necessary since it's wiped every time you switch the phone off...
And yes, please try this with another ROM and see if you get the same results.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Hi
I already try with a nother rom, it's same...
I relock the bootloader, it's same
I change the battery with a new one, it's same
I install apk find in this forum for bug-fix battery level 0% (fuel gauge fix), i can put it at 100% charged, i can't see when the level decrease it stay at 100%...
Thanks all for your answer