This is 1S 18650 Li-ion Lithium Battery BMS Charger Protection Board for 3.7V Battery.

Protections:

1. Short circuit protection
2. Overcharge protection
3. Over-discharge protection
4. Over-current protection

Pins description:

P-: negative of input or output power
P+: positive of input or output power
B-: negative of the battery
B+: positive of the battery

Features:

1. High accuracy voltage detection circuit;
2. Using high voltage device charging terminal;
3. The built-in three-stage overcurrent detection circuit (overcurrent 1, overcurrent 2, load short circuit);
4. The battery charge and discharge can control the MOS transistor;

Package Includes:

1 x 1S 18650 Li-ion Lithium Battery BMS Charger Protection Board for 3.7V Battery

Specifications:

Compatibility	Li-ION 3.7V Batteries (18650, 14500)
Overcharge detection voltage	4.25±0.05V
Overcharge Lift the voltage	4.23±0.05V
Over-discharge detection voltage	2.54±0.1V
Over-current detection current	3A
Working current	1A