RC Mini LED Stunt Drone Quadcopter Sky Patroller Li-polymer Battery 3.7V 380mAh. Go to amazon.com Related posts Thing need consider when find patroller plane? Feature1 Rechargeable Lithium Polymer Battery for Quadcopter3.7V 380 mAH rechargeable Lithium Polymer batteryEstimated amount of time needed to charge the battery is about 50 minutes