BAYANGTOYS X21 RC Quadcopter Spare Parts Battery Cover Description: Brand Name: BAYANGTOYS X21 Item Name: Battery Cover Usage: Spare Part for BAYANGTOYS X21 Quadcopter Package Included: 1 x Battery Cover Description: Brand Name: BAYANGTOYS X16 X21 Item Name: Battery Usage: Spare Part for BAYANGTOYS X16 X21 Quadcopter Package Included: 1 x Battery