That board is an on/off controller, rather than a full UPS interface. It only has two 3-pin SOT23s and one 5-pin SOT23 on it, so don't expect too many smarts.
I only meant it as a source of ideas, not something that you would actually use, particularly at that price. The Python script that makes it work is probably more interesting than the hardware. If you reuse those exact GPIO pins, you could use the script without modification.
Any UPS solution you come up with will need to do something similar.
Allan