Specification:Model: YL240Dimensions: 170x90x50mmBattery type: Li-ion batteryWorking power: 100-120Vac, 50 ~ 60HzSuitable for Battery Voltage: 48VOutput voltage: 54.6V (For 13S Li-ion Battery)Output current: 4Abattery Protection: SCP,OVP,OCP,OTPCharging mode: constant current - Constant Voltage - trickle (floating charge) three-stage intelligent chargingCharging efficiency: ≥85% (full load)Working temperature: -5 ℃ ~ +40 ℃Storage temperature: -40 ℃ ~ +70 ℃AC power cord, DC connector can be customized.Operating Instruction1. Before charging, please connect the DC terminal to battery first, and then connect the AC terminal.2. After charging complete, unplug the AC terminal firstly, and then unplug the DC terminal.3. No charging or after charging complete, be sure to unplug the DC terminal and AC terminal.LED Indicator:LED 1 red: Power on.LED 2 red: Battery being charged.LED 2 Flash: Battery will be charged completely soon.LED 2 green: Battery has been charged completely.Package:1* 54.6V 4A charger1* US standard power cable1* Operating manual1* Fuse for replacing