1S to 3s Li-ion 3.7v 18650 Battery conversion (4.2v to 12.6v DC) without BMS | This video shows the 1S to 3s Li-ion 3.7v 18650 Battery conversion (4.2v to 12.6v DC) without
Electronic Circuits: 3.7V Li-Ion Battery Charger Circuit using MCP73831 IC + PCB