Battery Calibration also shows you some battery parameters like temperature, charge level, general condition, etc.
How should you use Battery Calibration? Here is some manual:
1) Charge your phone until the battery is 100% full.
2) Click ''Calibrate!'' button.
3) Let the battery completely discharge.
4) Charge the battery once more to 100%.
Note that this free application is ad supported and contains ads.