WayIn&reg; 2pcs 3.7v 1000mah Battery and 1to3 Charger for Udi U842 U818S Rc Quadcopter Drone Black Spare Parts Fit for Udi U842 U818S Remote Control Quadcopter 100% New Udi U842 U818S Remote Control Quadcopter spare parts High quality and durable in use Easy to install Package Contents: 2pc 3.7v 1000mah battery + 1to3 charger