... T bank transfer Caapacity:5200mAh/3.7V Spec1. Battery Type:Li-Polymer Battery2. Capacity:5200mAh3. Input:Micro ... Press the button to display the battery cap,and Press the button for 3S to on or off USB ... after 30 Seconds;5)keep pressing the button for 3 seconds to open or close ther ... connectorb.1 PCS USB 5200 mAh Digital Battery Charger ,Power Bank for Iphone ,Mobile phone,camera, MP3/MP4,