Descriptions:
The lithium battery charging/discharging module can charge the battery connected to the output with 5V only by connecting a 5V voltage source to the micro USB port. The USB port can also be used as a consumer.
This charging module is a good choice for building a power bank, and is generally suitable for portable power sources that use Lithium 18650 batteries.
To use this module, you don't need to press its button and you will have an output automatically by connecting to the mobile phone.
The appropriate current for charging the mobile battery is automatically set. The use of this module is not suitable for power less than 0.5 W and higher than 10.5 W. This module does not have a protective circuit, so according to the voltage of 3 to 4.2 volts, series batteries should not be paralleled. The battery used should have a capacity of about 4A for discharge.
Note that this board is also used as a spare board for the Xiaomi Power Bank case.
Application:
To make a power bank
Specifications:
Output: maximum 5 volts, 1 amps DC
Input: 5 volts and 1 amp current (micro USB)
Dimensions: 16 x 18 x 66 mm