EasyAcc® 7000mAh Power Bank 2 x USB output (5V 1A ~ 2.1A) Mobile Charger External Battery Pack for iPhone, iPad, Smartphones, Tablets 5V, GPS, Bluetooth speakers, color: white (Wireless Phone Accessory) 5
EasyAcc® 7000mAh Power Bank 2 x USB output (5V 1A ~ 2.1A) Mobile Charger External Battery Pack for iPhone, iPad, Smartphones, Tablets 5V, GPS, Bluetooth speakers, color: white (Wireless Phone Accessory)
the external battery loads the iPhone 4 at least 3 times full. there are 2 different USB connector, 1x 1ampere, 1x 2ampere. about 2 amps plug takes the booting process of the iPhone about 1-2 hours.