Features: Premium Li-polymer battery cell, safer, stylish than ever. 20000mAh capacity, enormous energy for your device. Soft skin and perfect size, make it comfortable and portable. Well-designed dual USB ports 2.1A high-speed output charges your devices with a fast yet smooth experience. For a convinient life, it can be charged and charge your device at the same time. Intelligent charge, detect the input electric current demand of different devices.