Best Choice as Chirstmas Gifts: Exquisite and Thoughtful package,High Cost-effective Battery.Enough Power for your flight.(If you find the battery is a little thick, you can remove the plastic from the surface of the battery to make it fit)
Compatible with MJX X400 X400W Holy Stone X300C X400C X800 HS110 HS200 Syma X56W Sky Viper S670 V950hd V950str s1750 Drone.Product size:40*25*9.5mm/ 1. 57 x 0.98 x 0. 37 inches,Weight: 20g/ 0. 70oz.
Notice that the lights of the charger will be off while the batteries are charged fully.Stop charging automatically when batteries energy full(Charging will stop automatically after charging to 4.2V).It's safe to use,over charge protection, Short circuit protection.
Package including: 4pcs batteries(JST), 1set 4-port charger,4pcs adapter cables, 1pcs usb cable, can charge 4 batteries at one time!The charger has a very good connection with each batteries.
Customer Service: We provide friendly after-sale service and no risk refund for our customers. If you have any issue, please contact us and we will try out best to solve your issue!