... built-in battery: 3.7V,1800mAh 1000mA external potable power source:1. Fashionable design, aluminum shell, good performance components ... technology, which is environmental friendly. So the portable power can meet CE, FCC requirements.2. The ... ’s service efficiency. 4. Without any external power, it can charge all the electronic equipments whose ... Mp4 and so on. 1000mA external potable power source