Battery Calibration is a free Android application developed by the Slajed Team that helps improve your phone's battery life. The app is easy to use and comes with a nice UI. It offers a battery calibration tool that requires root access for the best results, but also works for non-rooted devices with extra steps.

The app includes a Battery Monitor Service (BETA) that provides you with the necessary information about your battery usage and a few battery-saving tips that can help extend the battery life. Additionally, the app includes a script to give necessary permissions. It is recommended to calibrate the battery at 100% for optimal results.

Overall, Battery Calibration is a great tool for anyone looking to improve their phone's battery life. The app supports both rooted and non-rooted devices. If you have any questions or concerns, you can contact the developer at Don't forget to rate and review the app to help others find it!