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 Global 27V AC / DC Adapter Compatible with Sharper Image 1011666 1013002 1012667 1013983 1013985 Powerboost Deep Tissue Cordless Massager Pro Percussion Device Massage Gun DC 27V 0.5A 2000mAh / 43.2Wh Lithium Ion Rechargeable Li-Ion Battery Compatible with: Sharper Image PowerBoost 1011666 (2316880) Black Percussion Deep Tissue Massager DC27V 0.5A 27VDC 500mA DC27.0V 0.5 A 27 V 0.5Amp 27 VDC 27 Volts Switching Class 2 Power Supply Cord Cable PS Battery Charger Mains PSU Compatible with: Sharper Image 1013002 1012667 1013983 1013985 Powerboost Deep Tissue Cordless Massager Pro Percussion Device Massage Gun; Sharper Image 1011666 (2313786) (2316222) Powerboost Deep Tissue Massager 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 Tested Units. In Great Working Condition. UpBright 30 Days Refund. 24 Months Exchange UpBright New Global 27V AC / DC Adapter Compatible with Sharper Image 1011666 1013002 1012667 1013983 1013985 Powerboost Deep Tissue Cordless Massager Pro Percussion Device Massage Gun DC 27V 0.5A 2000mAh / 43.2Wh Lithium Ion Rechargeable Li-Ion Battery DC27V 0.5A 27VDC 500mA DC27.0V 0.5 A 27 V 0.5Amp 27 VDC 27 Volts Switching Class 2 Power Supply Cord Cable PS Battery Charger Mains PSU CECCCROHS 100-240