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) UpBright New [UL Listed] Global 25V - 29V AC / DC Adapter Compatible with Eureka NEC101 Series 2000mAh 43.2Wh DC21.6V 2.0Ah 43.2 Wh 21.6 Volt 2000 mAh 21.6 Volts 2.0 Ah 21.6VDC 2Ah 21.6 V 21.6 VDC Lithium ion Li-ion Liion Rechargeable Battery Pack 150W Lightweight Handheld Vac Cordless Stick Vacuum Cleaner Model NEC-101 NEC 101 25V - 29V 500mA 25 V - 29 VDC 0.5A 25VDC - 29VDC 500 mA DC25V - DC29V 25.0V - 29.0V Class 2 Switching Power Supply Cord Cable PS Wall Home Battery Charger Mains PSU Tested Units. In Great Working Condition. UpBright 30 days Refund. 24 Months Exchange (Note: !!! 21.6V is vacuum's battery voltage. !!! NOT charger's voltage. !!! The charger's voltage is 25-29V. Please Check For Compatibility With Your Unit.) Note: Rechargeable batteries don't last forever, the average battery last 1 to 3 years. If the battery is old/bad, it will not accept a charge. But not charger's problem Compatible with listing item: EUREKA Cordless Vacuum Cleaner, Hight Efficiency for All Carpet and Hardwood Floor LED Headlights, Convenient Stick and Handheld Vac, Basic Red UpBright New [UL Listed] Global 25V - 29V AC / DC Adapter Compatible with Eureka NEC101 Series 2000mAh 43.2Wh DC21.6V 2.0Ah 43.2 Wh 21.6 Volt 2000 mAh 21.6 Volts 2.0 Ah 21.6VDC 2Ah 21.6 V 21.6 VDC Lithium ion Li-ion Liion Rechargeable Battery Pack 150W Lightweight Handheld Vac Cordless Stick Vacuum Cleaner Model NEC-101 NEC 101 25V - 29V 500mA 25 V - 29 VDC 0.5A 25VDC - 29VDC 500 mA DC25V - DC29V 25.0V - 29.0V Class 2 Switching Power Supply Cord Cable PS Wall Home Battery Charger Mains PSU CECCCROHS 100-240