5pcs 2A 1S Synchronous Buck Li-Ion Charger DC 5-23V to 4.2V 8.4V 12.6V Power Supply Module for 3.7V 7.4V 11.1V 18650 Lithium Battery

Description: 1-Cell(1S) 4.2V Version:Input voltage: DC 4.5V-23V(Recommend DC 5V/6V/9V/12V/15V)Charging voltage: 4.2VCharging current: 2A Led indicator:Bright: Charging Off: full blinking: almost full;