4 in 1 2.1A 4.2V pakrovėjas iškrovėjas DC-DC Boost Converter 3.7V to 5V maitinimo šaltinio Modulis

Features:

This is a multifunctional 3.7V/4.2V Mobile Power Diy module,3 in 1 Function: charge,discharge and battery protection.
It is very suitable for DIY mobile power.


Comes with battery protection, do not need battery protection board
(if your battery comes with a protective board, it does not matter)
Overcurrent protection(OCP)
Overvoltage protection(OVP)
Short circuit protection(SCP)
Over temperature protection(OTP)

Button mode:
The button duration is longer than 50ms, but less than 2s, which is a short press action. Short press will turn on the battery indicator and boost output.
The two consecutive short presses within 1 s will turn off the boost output and power display.

Pin description:
1 VIN : Charging port +
2 GND : Charging port -
3 GND : Battery port -
4 BAT : Battery port +
5 GND : Output port -
6 VOUT: Output port +
7 KEY : Output trigger port(Low pulse trigger)