Mobile Power Station for iPhone 4G 1,200 standby hours 2, Capacity:1500mAh,7 hourspower supply on Wi-Fi 3,Fit for:iPhone ... 4G Specification:1, Mobile Power Station for iPhone 4G2, Battery ... , c) 4.5 hours on 3G network, d) 7 hours power supply on Wi-Fi, e) 28 hours aduio playing, f) 7 ...