... 4.Capacity:2200mAh external battery power for mobile phone battery Basic parametersOutput Voltage: DC5.0V±0.25VOutput Current:≥ 500mA (Max:1000mA)Charging Input Voltage: 5V ... charging devices with a USB interface s,uch as mobile phone, iPhone, PSP, IPOD, MP3,MP4, PMP, GPS, Bluetooth, digital cameras external battery power ...