Festina F.16350 Watch: Identifying the Correct Battery Type and Replacement Cost

Hello friends and colleagues
Does anyone know what the battery is in this watch, the company is not necessarily the number?
My point is that in two watchmakers in Gdynia I was "sung" the price of the battery with the replacement of PLN 60 and 80
I understand that the labor must cost but as much or only as much because the battery from "space"

It's best to look inside and it will be clear what battery is there. The dimension and tension are the most important. There will also be an inscription on it identifying its model.

This is the easiest solution that I took into account right away, I even made a "tool" to unscrew the cap but I recalled an unpleasant experience with my other CYMA Navy Star Professional watch
After replacing the battery, the watch reacted to temperature changes, i.e. water vapor condensed on the inside of the glass.
After about a year of such use, the silver-pearl dial has lost a bit of its appearance, and it looks lousy, there are stains on it
Therefore, I would rather give it to a specialist
The watch is not cheap, that's why it's my "protection".
With this CYMA, I thought ... it's a pity to talk