The thumb-sized Gum Backup Battery in silver from Just Mobile is an extremely small backup battery for smartphones and USB devices. The Lithium-ion battery has a capacity of 2200mAh and can completely charge an iPhone. And when it comes time to recharge the Gum itself, simply recharge it via micro USB from your computer. The three green LEDs will show how much power is left. Also included are a travel pouch as well as a USB to micro USB cable and Apple dock connector.
Three micro-LED capacity indicators
1 A output
2200mAh Lithium-ion battery
Apple dock connector and USB-to-micro USB cable included
Travel pouch included
Apple certified - Made for iPod and iPhone
iPad, iPad 2, new iPad iPhon 3, 3GS, 4, 4S, 5 All iPod touch models