About this item For E58 S168 JY019 quadcopter The drone battery charger with overcharge protection and short-circuit protection ,to ensure a safe charging process safety use: using high quality aluminum board with good sealing ,make sure it antioxidant, heat-insulation and anti leak fluid Battery connector is exactly same shape with the original battery ,no loose problems Package Content:3pcs 3.7V 500mAh lithium battery