MiPow Power Tube 4000 mAh Backup Battery for Cell Phones, MP3 and Tablets - Light Blue
Price 36.08 - 36.99 USD
Apple iPhone 4S/Apple iPhone 4/Apple iPhone 3GS/Apple iPod/other mobile devices which support 5V/1A input (by USB cable) * Compact in size for easy transport * Lithium Polymer, 5 Volt, 1 A * Cycle Life: 500 times * DC Charging