About this item The item suit 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.