WLtoys Skylark V636 RC Quadcopter Spare Parts 3.7V 730mAh Battery Remote Control Toys Parts Brand name: WLtoys . Item name: Battery . Specification: 3.7V 730mAh . Dimension: 50*30*5mm . Usage: for WLtoys V636 RC Quadcopter . Package Included: 1 x 3.7V 730mAh Battery .