World Wide Input Voltage 100-240VAC 50/60Hz. OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection). Tested Units. In Great Working Condition. eeTao 30 days Refund. 24 Months Exchange. eeTao New Global 42V AC / DC Adapter Charger Compatible with Gotrax Model E4 E 4 E5 E 5 36V 4Ah 144Wh DC36V 4000mAh 144 Wh 36 Volt 4.0 Ah 36 Volts 4000 mAh 36VDC 4.0Ah Lithium Ion Li-ion Liion Battery Pack Zhejiang Taotao Vehicles Co.Ltd Model FY0474201000 FYO474201000 Shenzhen Fuyuandian Power Co., Ltd +42V 1A DC42V 1000mA 42VDC 1.0A 42 V 42 VDC Switching Power Supply Cord Cable PS Wall Home Charger Mains PSU !!!Note: Rechargeable batteries don't last forever, the average battery last 1 to 3 years. If the battery is old/dead, it will not accept a charge. But not charger's problem. If you're not sure whether battery or charger is dead or not. You must have a volt meter in order to tell whether or not a charger is working. eeTao New Global 42V AC / DC Adapter Charger Compatible with Gotrax Model E4 E 4 E5 E 5 36V 4Ah 144Wh DC36V 4000mAh 144 Wh 36 Volt 4.0 Ah 36 Volts 4000 mAh 36VDC 4.0Ah Lithium Ion Li-ion Liion Battery Pack Zhejiang Taotao Vehicles Co.Ltd Model FY0474201000 FYO474201000 Shenzhen Fuyuandian Power Co., Ltd +42V 1A DC42V 1000mA 42VDC 1.0A 42 V 42 VDC Switching Power Supply Cord Cable PS Wall Home Charger Mains PSU CECCCROHS 100-240