... , 1000mA 3. built-in battery: 3.7V,2200mAh mobile phone potable power charger:It has unique circuit design, which can indicate ... efficiency.The connecter is standard USB design, inner there is 2200mAh Li-battery.Fashionable design, aluminum shell, good performance components, ... environmental friendly. So the portable power can meet CE, FCC requirements.without any external power, it can charge all the ...