DBPOWER X400W Drone 2 Pack 3.7V 750mAh Li-Po Rechargeable Battery for DBPOWER X400C FPV RC Drone and MJX X400 Quadcopter DBPOWER X400W Drone 2 Pack 3.7V 750mAh Li-Po Rechargeable Battery for DBPOWER X400C FPV RC Drone and MJX X400 Quadcopter