CyberTech Wall Charger with USB Port & 2300mA Replacement Battery for SamSung Galaxy S3 i9300 Wall charger features extra USB port to provide extra charging port for USB charging All batteries use Grade A Cells and have been tested before shipment Portable, lightweight and easy to carry This replacement battery has an integrated microchip that prevents overcharging and lengthens battery life Best replacement for the battery with comparable standby and talk time