YouCute 4pcs 3.7v 300mah Official Battery and 1to6 Charger for Sky Walker 1306 Rc Quadcopter Drone Spare Parts Package included : 4PCS 3.7v 300mah + 1to6 charger kit For Sky Walker 1306 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