MHO-C401 Xiaomi Mi Humidity Sensor Digital Thermometer Hygrometer not working anymore, stuck with low battery

[Jackopinox]

Hi everyone,
I bought this thermometer 6 months ago and never changed battery since december 2021 when it magically died just for being on for 6 months.
This is the situation as of december 2021

Fun fact, that's the same situation right now.

When this screen appeared I changed the battery with a new one and nothing has ever changed since it has been inserted. What can I do? I really need it back working.

PS
Yes the screen stays like that even with no battery

Thank you
Jackopinox