New Xiaomi Yi 2400mAh Yi Camera Xiaoyi External bacpac Battery +backdoor of Housing for Xiaomi Yi sport camera accessories compatible: Only millet Xiaoyi Yi camera Package includes: 1 Xiaoyi camera battery pack ,1 USB cables ,1x to extend the back door of the waterproof case Battery capacity: 2400 Ma ,Battery type: lithium ion Battery voltage: 3.7 Volts ,Charger input voltage: 5V 1A DC colour:white