I’ve changed batteries on previous cars without a wrestling (and swearing) match.
I’ve also read the useful Key Fob threads in the Octavia page, but my key fob internals have a different layout.
Having seen the Low Batt message a few times on the dash in recent weeks I decided to open my 3 fobs and select the best battery for my No.1 key. Expecting all 3 to last another month till departure day.
So I did RTFM.
Surprisingly, Fob 1 opened up without much difficulty, but no way could I get 2 and 3 to open. Brute force in the wrong place of course was going to break something (expensive). With hindsight I’m not really sure how I managed to pop No1 first time.
Long story short - there’s a very special location for a narrow bladed screwdriver (or ex-screwdriver in my case) to slide up a “ramp” inside the fob and pop one end of the cover and allow it to be prised off without damage.
The manual simply says “stick a screwdriver in and turn it” without providing the vital clue regarding precise location. No chance.
All is revealed, literally, when you get it open.