If you want to figure out the battery health and number of charge cycles your device has so far (good to determine if a battery replacement is needed or when buying a preowned/refurbished one), you can do the following:
- Open the Dialer, enter
- Scroll to the bottom, and select
Run dumpstate & copy to sdcard. This can take a few minutes, but the ZIP archive's default filename and the location it'll be saved in will pop up when it's done.
- Exit on the bottom or press the home button/back button.
- Connect the phone to the computer (or send the file to one), browse internal storage and go under the
logfolder, and copy the ZIP file to a computer. Open the archive and look for the
- Search for
mSavedBatteryAsocwhich is the battery health percentage (the closer it is to 100% the better) and
mSavedBatteryUsagedividing the number by 100 gives you the charge cycles.
To delete the log on the phone, open the Dialer again, put in
*#9900# and choose