Specification:AC voltage: DC 4.2–5V CC / CVSingle cell current consumption: and lt;= 6uA continuous discharge current 2.7ACharging detection voltage: 4.2 V +/- 0.025VCharge detection delay time: 150-500 msCharging recovery voltage: 4.0V +/- 0.025VDischarge detection voltage: 2.75V +/- 0.1VDischarge detection delay time: 50-150msDischarge recovery voltage: 2.9V +/- 0.10VCurrent detection voltage: 150 +/- 30mvCurrent detection current: 4.5 +/- 0.5ACurrent detection delay time: 5ms-15msCurrent restore type: automatic restoreShort circuit detection status: external short circuitShort circuit detection delay time: and lt;= 50usShort circuit recovery status: automatic restoreInternal resistance: MOSPET and lt;= 40m ohmOperating temperature range: -40 – +50 degrees CelsiusStorage temperature range: -40 – +90 degrees CelsiusSize: 28 * 3.8 * 1.2 mmFeature:1. Connect the charger Teminal with high pressure resistant instrument2. Internal three-phase overcurrent detection circuit (overcurrent 1, overcurrent 2, load short circuit)3. MOS tube can control battery charge and discharge4. Operating temperature rangeLow current consumptionIntroduction to solder joints:1.B +: Connect the positive pole of the power supply2.B-: Connect the negative pole of the power supply3.P +: Connect the charge/discharge terminal (common to the charging port/outlet)4.P-: Connect the charging/discharging port negative (common to the charging port/discharge port)Package Included:1 * 1S 3.7V 2.5A Lithium Battery Protection Board