CyberTech Wall Charger with USB Port & High Capacity 2600mAh Replacement Battery for SamSung Galaxy S4 i9500 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