... 3. built-in battery: 3.7V,1800mAh 1000mA external potable power source:1. Fashionable design, aluminum shell, good performance components, ... no-lead technology, which is environmental friendly. So the portable power can meet CE, FCC requirements.2. The connector is standard ... the battery’s service efficiency. 4. Without any external power, it can charge all the electronic equipments whose output is ...