KUAIYU 5 X 3.7V 750mAh Battery + Charging Cable For V636 V686 V686K V686J Brand Name:KUAIYU Specification: 3.7V 750mAh 25C Charging time: about 30 minutes Usage: for WLtoys V636 V686 V686K V686J RC Quadcopter Dimension: 48*28*55mm,Charge 5 batteries at one time