Super Fly 4-port Fast Charger Sets with 3.7V 200mAh Lipo Battery for RC Helicopter / Quadcopter WLtoys V911 V911-1 V911-2 F929 F939 Brand: WLtoys Model Number: X4A-C01(VA07) Type: Battery Chargers Battery Capacity: 3.7V 200mAh 25C Battery Voltage: 3.7V Size/Dimensions: 12.5 * 8.8 * 4.8cm Weight: 0.23 Features: High quality and durable perfermace. Portable and easy to carry. X4 charger can charge four battery once time. Safety for the using time of battery. Can be applied for many types of RC vehicle.