MJX X300C RC Quadcopter Battery Posted on 2016-06-24 | by rcbuying1128 MJX X300C RC Quadcopter Spare Parts 3.7V 750mAh Battery MJX X300C RC Quadcopter Battery Description: Brand No.: X300C Brand: MJX Item name: Battery Power: 3.7V 750mAh Usage for MJX X300C RC Quadcopter MJX X300C RC Quadcopter Spare Parts 3.7V 750mAh Battery