YouCute 4pcs 3.7V 780mAh Official Battery and 1to6 Charger for Wltoys V636 V686 V686G V686K JJRC V686 RC Quadcopter Drone Spare Parts Package included 4PCS 3.7V 780mAh official Battery and 1to6 charger For Wltoys V636 V686 V686G V686K JJRC V686 RC drone Charging 6 batteries at the same time Over charge protection, Short circuit protection. Light in Green when charging,light off when charge complete