ITEM NAME:2Cells Single Lithium ion Battery Charger Module 1-2A PCB 18650 TP5100 M&O Size(approx): 25 * 17 * 5mm Input voltage: DC 5-18V (5V-12V is appropriate) Charging state: Full and no load: Blue light; During charging: Red light Chip: TP5100 Package Included:.Chip: TP5100. Full and no load: Blue light;. Size(approx): 25 17 5mm.