backup power for iPhone

Backup power for iphone Features: 1) Built-in USB cable. 2) Direct USB Charging from computor or USB charger. 3) Automatic tests iphone/ipod function. 4) Compatible with all iphone / ipods. 5)4 LED shows charging status. 6) 1 button tests power. 7) High quality Li-ion Cell. 8) Can recharge up to 500 times. Specification: Input: 5V/500 mA Capacity: 1000 mA Output: 5V/500 mA User Manual: Bottom Button: Bottom button shows remaining power. Input: 4 LED turn flash one after another while charging fromthe charger, 4 LED light when charging completely. Output: 4 LED flash one after another while chargingfor iphone, not flash when the power use up. Charging time: around 2 hours thru travel charger for iphone. Around 4 hours USB charging cable for iphone.