Universal micro interface design, charging with USB cable. 4 LED indicator lights show battery level
Micro USB input and USB output Can be charged by USB Wall charger, Car charger, external battery or other devices with USB port, perfect for outdoor supply
Battery Specifications: Voltage: 7.4V Capacity: 9800mAh Cell Type: Li-ion Color: Black Smart LED charging status indicator Input: Micro USB Output: USB Dimension: 1.5x2.8x2.9 inch Weight: 290grams ">