Which battery for key fob? (keyless entry)
 

I have a 2018 V60 with keyless entry but I imagine this would apply equally to any car with keyless entry.
A few months ago I found that the keyless feature was regularly not working unless I had the key pretty much next to the handle.
I ordered a stack of CR2032s off ebay and replacing the battery in the key fob did the trick but within a month the performance of the keyless entry was deteriorating again.
Lesson learned - don't buy the cheapest batteries listed on ebay but the question is, which batteries to buy?
My "go to" would be Duracell but are there other options with a higher capacity that are specifically designed for car keys?
Also where to buy from given the high proliferation of fake stuff on ebay and amazon marketplace?

No, not that I'm aware of. Duracell, Panasonic or Sony are all good.

My car is nearly 5 years old and I'm still on the original batteries for both main fobs (unless the dealer is secretly replacing them).

The 'sports' fob gave up at the 3-year point.

Just had the same issue, last few weeks it’s been lazy opening, finally the only way was by opening the boot first, no warning on the dash, but changed the fob battery yesterday and all good now.

Mine almost 3 years old and I'm still on the original batteries for both main fobs too.