3-PIN INLINE CHARGER PLUG (BATTERY CHARGER CONNECTOR) FOR RAZOR ELECTRIC SCOOTER | eBay
Amazon.com: EVAPLUS Power Adapter Female DC Port Inline Connector for 36V Electric Bike Lithium Battery Charger, for 36V li-on Battery Pack, 42V 2A Charger, Diameter 5.5mm, 2.1mm : Sports & Outdoors
House Battery Charger Connectors - ElectricScooterParts.com