Powerful, plastic design emergency charger with flashing battery indicator Built-in lithium battery (5200mAh/3.7V) Input: 5V-1A Output: 5V-1A USB PowerCharger may, with the supplied USB cable, charged. Suitable for charging of the most popular mobile devices (eg smartphones, music players and tablets). incl. instructions. When you divide the power of the PowerCharger (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 piece in a gift box with magnetic closure.