Item specifics:  Type: Emergency / Portable Compatible Brand: All phones are applicable Brand Name: xiaomi Battery Capacity(mAh): 15200 Model Number: M1-2 Product Description: Battery type: 18650 battery Interface: Micro USB(input), USB(output) Input: DC 5V, 2.0A Ouput: DC 5.1V, 2.1A Charging time: about 5.5hours with 5V/2A charger Charge temperature: 0-45 Discharge temperature: -20~+60 Weight: 250g Size: 9 x 7.7 x 2.2cm(L x W x T)