UK company Veho offers the Pebble Smartskin (model VCC-A011-SKN) battery case for Apple iPad. The SmartSkin packs a 6000mAh battery giving your iPad up to an extra 500 standby hours, 50 hours of audio playback and 7 hours of video playback.
The Veho Pebble Smartskin is a soft grip rubber touch protective skin with micro USB port for charging and sync. It comes with a neoprene sleeve and a USB cable. The Pebble Smartskin is priced at $89.95.