5Pcs 4 In1 Battery Charger Board DC 5V 2.1A Module 3.7V

Name：5Pcs 4 In1 Battery Charger Board DC 5V 2.1A Module 3.7V 18650
4-in-1 charge/discharge/lithium battery protection/battery power indicator module. The module comes with a lithium battery protection function (the lithium battery does not need to be equipped with a protection board, it does not matter if it is equipped with a protection board)
Overcurrent protection (OCP). Over Voltage Protection (OVP) Over Temperature Protection (OTP). Short circuit protection (SCP)
In the discharging mode (the KEY function of the charging mode is invalid), trigger the KEY port once to turn on the output; trigger the KEY port 2 times to turn off the output.
When the load is connected twice, the output will be turned on automatically. If the load is less than 50MA, the output will be turned off after 30 seconds; if the load is greater than 50MA, the output will be continuously turned on.
Allow charging and discharging at the same time (Note: At this time, the output voltage is less than 5V. Stop charging and discharging will also stop. It will be output only after reactivation.)

Charging voltage: DC 4.5V-5.5V (DC 5V recommended)
Charging current: 0-2.1A
Charging quiescent current: 100uA
Full voltage: 4.2V+-1%.
Discharge current: 0-3.;
Discharge quiescent current: 50uA
Discharge efficiency: 96%
Output voltage: 5V
Output current: 0-2.1A;
Ambient temperature: -20°C to +85°C
Pin description:
1 VIN: Charge port positive input +
2 GND: Negative input of charging port-
3 BAT: Lithium battery +
4 GND: Lithium battery-
5 GND: output port negative output-
6 VOUT: Output port positive output+
7 KEY: Output enable trigger port (low pulse trigger)
Material:PCB
colour:green

Package Contents:
5 x Charging Board Module

Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.

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