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 5V USBC AC/DC Adapter Compatible with nooro 860009602151 Cordless Knee Massager 3000mAh Lithium Ion Battery DC5V 2A 5VDC 2000mA 5.0V 2.0A Power Supply Cord Charger PS Wall Home Battery Charger Mains PSU Compatible with:nooro 860009602151 Cordless Knee Massager 3000mAh Lithium Ion Battery DC5V 2A 5VDC 2000mA 5.0V 2.0A Power Supply Cord Charger ⚠️!!!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 5V USBC AC/DC Adapter Compatible with nooro 860009602151 Cordless Knee Massager 3000mAh Lithium Ion Battery DC5V 2A 5VDC 2000mA 5.0V 2.0A Power Supply Cord Charger PS Wall Home Battery Charger Mains PSU CECCCROHS 100-240