Then according to what you just mentioned, it wasn’t the brand of battery because both brands didn’t work in your non working key fob. That means the electronics inside are not working.

 

It's hard to get across exactly what happened but the Sony battery now works in the key fob that had the bad battery. Don't know why it didn't work when I swapped them out initially but now it works.
So now I will look for a Sony 2032 battery.

 

Ah, ok, then that’s interesting. I can’t imagine they’d make a key fob that only works with one brand of battery though. Thats like the car itself only working if it has the Porsche branded battery installed. Lol.