duds

Goodness, the time I've spent getting my fobs to work! I fitted a new, 3.28v, Duracell battery but the fob didn't flash the red light signal when a button was pressed. However, when I eventually programmed this to my Octavia (and I tried a dozen or more of the recommended methods), somehow, one worked. I just don't know how. So now to the other key. Same replacement battery. Totally failed to get the red light after cleaning the battery, re-fitting, etc. So I resorted to trying a 2032 battery instead of the correct 2025. It would not quite clip into the battery space, so I simply pressed on the side cover that pushes against the battery and that held it ok and the red light worked. Easily programmed. But what is it about these batteries and fittings!? I've ordered two Panasonic 2025 now to see whether this will resolve matters since so many have said this is a better make of 2025.