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