Compact aluminium powerbank with built-in lithium battery (2000mAh/3.7V). Input: 5V 1A. Output: 5V 1A. The powerbank can be charged by USB cable and is suitable for charging the most common mobile devices (including smartphones, music players and tablets). Incl. instructions. When you divide the power of the powerbank (mAh) by the capacity of the battery in your mobile device (mAh), you know approximately how many percent or how often you can charge your mobile device. Each in a box.