WSDMAVIS 2 Pcs 18650 Lithium Battery Charge Module 5V to 4.2V 3A Lithium Battery Fast Charging PCB Board with Type C Input

ideal for charging Lithium polymer battery,and not suitable for 3.2V LifePo4 batteries.Has no power indictor and battery protection function.Indicator light:Red is work indicator,Blue is Full Charged indicator lights. Main control chip:IP2312(adopts complete CC / CV charging mode);Input voltage:4.5-5.5V；Charging cut-off voltage:4.2V；Charging current : 3A ( current can be changed by adjusting resistance);Conversion efficiency :3A/93%,2A/94%,1A/95%(Data for reference onIy) When the battery voltage is less than 3V , it enters trickle current charging mode and charges the battery with 100mA charging current.When the battery voltage is greater than 3V , it enters the constant current charging mode to charge the battery with the set constant current charging current.When the battery voltage is close to 4.2V and the charging current is less than 300mA , it enters the constant voltage charging mode. After entering the constant voltage mode , stop charging every 4 minutes , and check whether the battery voltage is higher than 4.15V : If it is higher than 4.15 V stop charging ; otherwise , continue charging , and then test after 4 minute.When the battery is full , if the battery voltage is detected to be less than 4.1V , it will be tumed on to charge the battery. Current adjustment: default is 3A, 2A after removing the resistance, and 1A after replacing it with 135K resistance.