Features:1. It is Li-Po Battery with for MJX X300 X400 X800 4CH 2.4GHz 6 Axis Gyro RC Quadcopter2. Lightweight、 durable、 practical and convenient to use3. High capacity and long life span4. 100% brand newSpecifications:1. Model: X8-0012. Battery Capacity: 750mAh3. Battery Voltage: 3.7V4. Cells: 2cellsPackage Includes:4 x 3.7v 750mAh Li-Po Battery1 x 4in1 USB charger adapter4 x JST to XH cable line