DBPOWER X400W Drone 2 Pack 3.7V 750mAh Li-Po Rechargeable Battery with Free USB Charger for DBPOWER X400C FPV RC Drone and MJX X400 Quadcopter 100% brand new and high quality Battery capacity: 3.7V 750mAh Compatible for DBPOWER X400C FPV RC Drone and MJX X400 Quadcopter