This is  5S 15A 18650 Li-ion Lithium Battery BMS Charger Protection Board for 18V 21V Battery. It ensures the security of the battery pack.

Connection Diagram of 5S 15A 18650 Li-ion Lithium Battery BMS Charger Protection Board for 18V 21V Battery

Features :

1. Single section power consumption since: 30 μA
2. Power consumption between single section: 3 μA
3. Single section over charging sensing voltage: 4.18- / 4.22V
4. Over-charging recovery voltage: 4.05-4.15V
5. Overcharge detection delay: 0.5 / 1.0 / 2.0S
6. Single section discharge detection voltage: 2.75-2.85V
7. Over discharge recovery voltage: 2.90-3.20V
8. Discharge detection delay: 0.5-2.0S
9.