First of all, I would like to say words of gratitude to the manufacturer for the possibility of powering my favorite board from a voltage of 12 volts. It is implemented in two ways:
2. PSU Module
Of course it is very good and convenient. BUT! I would like to make a manufacturer make PSU with UPS function, namely:
- the ability to connect to the "UPS PSU" battery cast (3.7 V).
- the ability to charge this battery when the main power is supplied to the "UPS PSU" (12 volts).

This will greatly help many developers of equipment on your boards.