... . DC output: 5V, 1000mA 3. built-in battery: 3.7V,2200mAh UPS battery bank for mobilephone:1. Fashionable design, aluminum shell, good performance ... standard USB design, inner there is 2500mAh Li-battery. 3. It has unique circuit design, which can indicate the charging performance, also ... , mobile phone, digital camera, MP3, Mp4 and so on. UPS battery bank for mobilephone