Top Race&reg; 3.7V 600mAh Lipo Battery for TR-Q511 QuadCam (Set of 2) Original Top Race Battery, for Top Race Drone TR-Q511 QuadCam X2 3.7V 600mAh Lipo Battery Will work for similar drones and RC models from different brands like Syma X5,X5c etc. Set of 2 Batteries