Yunhua 3.7v 650mah 20c Lipo Battery(5pcs) with 5 in 1 X5 Battery Charger for Syma X5 X5c Parts 3.7V 650mAh 20C Lipo Battery(5PCS) with 5 In 1 X5 Battery Charger for Syma X5 X5C X5C-1Parts Charger Voltage input: DC 5V; Voltage output: 4.2V  5%; Current output: 350mAh - 410 mAh Charging 5 battery at one time, Over charge protection, Short circuit protection Package Included: 1 charger, 5pcs 650 mAh batteries Battery slightly fat then the original one