Unlike other battery savers like JuiceDefender that require regular user manual actions, GreenPower is an easy battery saver that is fully automatic: Once configured, it runs and saves your battery by itself. It does so by smartly managing Wifi, Mobile data, Bluetooth and Screen Brightness: Turning them off when you don't need them, but ensure minimum disturbance: Automatic turned ON when needed by you or by other apps (e.g retrieving mails). Easier, cleaner and faster than competitors like JuiceDefender , 2x battery saver and easy battery saver!