YouCute 4pcs 3.7V 1250mAh Battery and 1to6 Charger for syma X5HW X5HC RC Quadcopter Drone Spare Parts package include : 4pcs 3.7v 1250mah battery + 1to6 charger kit For syma X5HC X5HW Batteries come equipped with built-in protection mechanism for safe charging and use. Charging 6 battery at one time, Over charge protection, Short circuit protection Batteries slightly fat than the original one,rechargeable up to hundreds of times.