18650 Lithium Battery Charger Protection Board Power Step-Up Boost 3.7V to 5V1A Converter Lithium 18650 Battery Charge Balance

Product Parameters:1.Input Voltage:3.7V~5.5V2.Charging Current:1A(max)3.Output Current:1A(max)4.Output voltage:5V 5.BAT Discharging Stop Voltage:2.9V 6.Discharging Efficiency:85%(input 3.7V output 5V/1A) Features:1.Charging and discharging indication2.Internally installed charging and discharging power MOS 3.Preset 4.2V charging voltage, precision ±1% 4.Max 8uA standby current5.Integration charging management and discharging management6.Intelligent temperature control and overtemperature protection7.Integration output overvoltage protection,short coircuit protection,overload protection8.Integration overcharging and overdischarging protection9.Support trickle mode and zero voltage chargingLight display:Charging: red light flashing (red light long brightness means full charged)Discharge: Blue light flashing