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 Gyroor Model H40 H 40 37V 2.5A 92.5Wh DC37V 2500mAh 37 Volt 2.5Ah 37 Volts 2500 mAh 37VDC Lithium ion Li-ion Liion Battery Pack 200W +42V 800mA DC42V 0.8A 42.0V 0.80A 42VDC 42.0VDC 42 V 42 VDC Switching Mode Power Supply Cord Cable PS Wall Home Charger Mains PSU ⚠️!!!Tips: 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 Gyroor Model H40 H 40 37V 2.5A 92.5Wh DC37V 2500mAh 37 Volt 2.5Ah 37 Volts 2500 mAh 37VDC Lithium ion Li-ion Liion Battery Pack 200W +42V 800mA DC42V 0.8A 42.0V 0.80A 42VDC 42.0VDC 42 V 42 VDC Switching Mode Power Supply Cord Cable PS Wall Home Charger Mains PSU CECCCROHS 100-240