Download this app to your desktop
Installed a new ROM? Or does your battery seem to be gone and drains very quickly? There's an easy help for this!
Battery Calibration is a simple app that formats the batterystats.bin file located in your /system storage.
This app removes the old values. After some time, your system will generate new, updated values.
This process significantly raises the battery life. Also, you can calibrate your battery basically anytime, whenever
you feel like your battery life needs to improve.