This module is a charging and discharging integrated module, with LED indicators, which can know the working status of the module more intuitively and clearly.

Pin description:
VIN: Charge Port Positive Input + DC4.5V-5.5V(Recommended 5V)
GND: Charger Negative Input -
BAT: Lithium Battery +
GND: Lithium Battery -
GND: Output Negative Output -
OUT: Output Positive Output +
KEY: Output Enable Trigger Port (Low Pulse Trigger)

Instructions for use:
1.In discharge mode (The charging mode KEY function is invalid), trigger the KEY port once to open the output; continuously trigger the KEY port twice to close the output.
2.The first time the load is connected, the output is automatically turned on. If the load is less than 50MA, the output will be automatically turned off after 30 seconds; if the load is greater than 50MA, the output will be automatically turned on.
3.Allows charging while discharging.(Note:At this time, the output voltage is greater than 4.7/less than 5V)
4.When the module is charged and connected, the output will switch to the external power supply (the power will be cut off for 0.3s). When charging, the output voltage will be greater than 4.7/less than 5V, depending on the load capacity of the charger!
5.MCU users, if you accept a small load KEY can be connected to the microcontroller about 20s to provide a low level allows the module to continue working.
6.Trigger mode: low level trigger (ground)

Applications:
Car charging retrofit
Driving recorder power supply
Mobile power/Power bank
Portable devices such as mobile phones and tablets

Package includes:
8 x 2A 5V Charge Discharge Integrated Module
2 x USB Female Cable