Samsung ETC-CP1G6LGSTA Spare Battery Charging System for Samsung Galaxy S3 - Original OEM - Non-Retail Packaging - Black Spare battery charger 2100mAh Standard battery 700mAh Travel Charger This battery charger comes with a 2100mAh standard battery to keep your phone powered at all times. The battery charging unit converts into a compact carrying case for your battery, which makes it perfect for travelling.