... output: 5V, 1000mA 3. built-in battery: 3.7V,2200mAh UPS battery bank for mobilephone:1. Fashionable design, aluminum shell, ... is standard USB design, inner there is 2500mAh Li-battery. 3. It has unique circuit design, which ... performance, also can improve the battery’s service efficiency. 4. Without any external power, it can charge all ... camera, MP3, Mp4 and so on. UPS battery bank for mobilephone