If your Android phone’s battery seems to have less zip in its step than it used to it may be in need of recalibration; BatteryCalibration revitalizes the battery on rooted Android phones.
Download the app, run it, and let your battery reach a full charge. The application kills your old battery stats file, replaces it with a fresh one, and ensures that a poorly calibrated stats file or a leftover one from a prior ROM doesn’t muck up your battery life. Hit up the link below to read more and grab a free copy. Battery Calibration is for rooted Android 2.1+ devices.