This is the only leather cover that doubles the life of an iPad's battery. A 9 1/2" long x .9" lithium-polymer battery slips unobtrusively into a cylindrical tube built into the hinge of the cover for minimal bulk. The battery effectively doubles an iPad's battery life, providing up to 24 hours of continuous video playback or up to 12 hours of industrious use (highest brightness, loudest volume, enabled WiFi, and graphics-heavy games). The included cable connects the battery to an iPad's charging port while the iPad nestles inside the cover. Less than 1/4" thick, the case protects an iPad on all four sides yet keeps controls exposed for easy access, so total thickness with an inserted iPad is only 1/2". The cover adjusts for laptop use while typing and browsing or upright use for watching movies. Plugging the battery into a computer or AC using the included USB cable results in a full charge after nine hours. Compatible with iPad and iPad2. 9 3/4" L x 9 1/2" H x 1/4" D. (3/4 lb)