battery power station for iPhone 4G 1,400 standby hours, 7hours on ... 2300mAh 3.Fit for iPhone 4G Specification:1, battery power station for iPhone 4G2, Battery type:Li-ion3, Capacity:2300mAh4, ... two in one function.It has data modem and intelligent switch, conected with PC and ITunes, long-life and safety ... talking hours, c) 7 hours on 3G network, d) 8 hourspower supply on Wi-Fi, e) 30 hours aduio playing ...