Specification:
Origin: Mainland China
Type: Module
Condition: New
Product size: 24.00x20.00x4.00mm
Product size: 0.94x0.79x0.16inch

1. This link module is protected, and the battery can be used with or without protection. You do not need to worry about the T point. Just ignore these.
2. Attention! Notice! Customers who do not have a multimeter should not purchase this product. Do not ask for advice on how to adjust the voltage if you do not have a multimeter. The factory voltage is random.

Product features and parameters
1. Up to 1A programmable linear charging current
2. For single cell 3.7V lithium battery, fully charged 4.2V
3. Constant current/constant voltage charging with over-temperature protection
4. Soft start limits surge current, with battery reverse connection protection
5. Low power consumption standby to extend battery life
6. Dual output of charging status, no battery and fault status display
7. Can be activated at 0V and trickle charged at 2.9V
8. Working temperature -40~80℃
9. Input voltage range 4.2V~6.5V
10.Output voltage 4.2V-28V adjustable
11.Maximum power 5W

Charging indicator light description
The module can roughly judge the working status of the module through the two LED lights and other status. CHRG
It's red, stdby is blue. When the battery is charging, the red light is highlighted and the blue light is on.
Not on, but the red light is slightly brighter. If there is a boost output
Depending on the output power, the red light may be highlighted during charging but not connected.
When there is no load, the blue light is on and the red light is dimly on.

Note:
Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
Please allow 1-2cm measuring deviation due to manual measurement.

4pcs 1 x Charge Boost Discharge Adjustable Module