XCSOURCE 4x 3.7V 25C 600mAh Battery + Charger for UDI U816 U941A Helicpoter Drone RC165 Widely used on RC airplane,helicopter, ect. 4pcs 3.7V 25C 600mAh battery, 1pcs 4in1 charger adapter (With USB cable) The charger has 4 charging port, supported charging 4pcs batteries at once, saving a lot of time. Compatible Brand: for UDI / Hubsan / JXD Helicopter Compatible Model: UDI U816, UDI U941A,Hubsan H107D, Hubsan H107L,Hubsan H107D, Hubsan H107L