Noiposi 4pcs 3.7V 780mAh 20C Lipo Battery with X6 Charger for Wltoys V636 Quadcopter Note that 3.7v 780mah lipo battery is wider and thicker than the original battery for AUKEY Mohawk Drone.It doesn't fit for AUKEY Mohawk Drone.In addition ,The batteries are too big for propel cloud rider Charger Voltage input: DC 5V; Voltage output: 4.2V,charging 4 battery at one time ,over -charge protection and Short circuit protection Product size:55*30*7mm/2.16*1.18*0.28inch Suitable for :MJ100 MJX X200 Red Lights on: currently charging ;Red Lights off: charging completely