The iPhone 3G and 3GS Battery Shell Case is a smart and nifty accessory for your iPhone 3G and 3GS. The battery case for iPhone 3GS lets you keep your phone safe, and has good accessibility options with proper cut-outs for the video camera and buttons. Moreover, with unique in-built battery incorporated in this case, you can charge your iPhone 3G and 3GS anytime and anywhere.