WLtoys V911 V911-1 V911-2 3.7V 200mAh Battery with Charger Remote Control Toys Parts Name: Battery Set With Charger . Model: X4-011 . Battery: 3.7V 200mah . Usage: For WLtoys V911 V911-1 V911-2 RC Helicopter. . Package include: 4 x 3.7V 200mah battery . 4 x Connecting cable . 1 x Charger .