Cheerwing 3.7V 550mAh Lipo Battery (4PCS) with 4 In 1 Battery Charger for Syma X5SW X5 X5C X5C-1 RC Quadcopter Drone Parts 3.7V 550mAh 20C Lipo Battery(4PCS) with 4 In 1 Battery Charger Charger Voltage input: DC 5V; Voltage output: 4.2V  5%; Current output: 350mAh - 410 mAh Charging 4 battery at one time, Over charge protection, Short circuit protection Fits Syma X5C, X5C-1, X5SC, X5SW Package Includes: 1pcs x charger, 4 pcs x 550mAh batteries