eeTao 3-Pin 54.6V 2A Replacement Charger Compatible with Ridstar Q20/Q20 Lite Fat Tire 1000W Motor 48V 15Ah/20Ah Lithium-ion Battery 20 inch Electric Motorcycle Power Supply Cord Cable Compatible with 48V 10Ah-20Ah Li-ion Battery 54.6V XLR 3Pin Charger 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 (Note: !!! 48V is battery's voltage. !!! NOT charger's voltage. Please Check For Compatibility With Your Unit. Thanks !!!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 3-Pin 54.6V 2A Replacement Charger Compatible with Ridstar Q20/Q20 Lite Fat Tire 1000W Motor 48V 15Ah/20Ah Lithium-ion Battery 20 inch Electric Motorcycle Power Supply Cord Cable PS Mains PSU CECCCROHS 100-240