Dexim Super-Juice Power Case for Apple iPhone 4 / iPhone 4S 2000mAh Lithium Polymer Battery With Built-In Kickstand Made for Apple iPhone 4 and iPhone 4S Capacity: 2000mAh Lithium Polymer Battery Adds up to 6 hrs more talk time, up to 10 hrs more video time, and extra 40 hours of music listening Protective Touch Case, Included micro-USB allows phone charging without having to remove from case Built-In Kickstand for hands free video viewing