I used to have an Xperia pro, the one with the physical keyboard. It was my last keyboard phone. I absolutely loved it.
Flashed a different OS, cyanogenmod I believe, which broke the governor chip (irreparable; known issue but super buried, would have done the same with any OS of that version number, including stock) so it would read as a dead battery if not on the charger.
Never touched Sony phones again. Don’t trust them at all.