Brand New, High Quality Replacement AC Wall Power Charger Adapter New Global 37.4V AC / DC Adapter Compatible with Lupe Technology Model Pure Cordless 34.2V 2.5Ah 81Wh DC34.2V 2500mAh 34.2 Volt 2.5 Ah 34.2 Volts 2500 mAh 34.2VDC Lithium ion Li-ion Liion Rechargeable Battery Pack Type PC01-L PC01L 3 in 1 Wireless Upright Vacuum Cleaner DC37.4V 1A 37.40V 1.0A 37.4VDC 1000mA 37.40VDC 37.4 V 37.40 VDC Class 2 Switching Power Supply Cord Cable PS Wall Home Charger Mains PSU Compatible with: Ktec Model KSA-38B-374100DS KSA-38B374100DS KSA38B-374100DS KSA38B374100DS KSA-388-374100DS KSA-388374100DS Class 2 Power Supply; !!!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.