Does replacing the battery in carts devalue them?

[Trade-N-Games]

I would say 25% of them had leaking or corroded batteries. Leave something like that in there long enough and the acid contaminates the rest of the circuit board, with migrating corrosion.

In five or ten more years people won't be asking if the original battery is intact, (assuming this was ever an issue,) they'll be asking if the game still saves and more importantly, if it still works at all.

Can anyone back up this claim? I have opened 1000's of nes and SNES and I can remember 2 having this problem but it was clear as day they were bad before I opened them due to no label and cart had holes. Has anyone found the batt less than $10 each that have the little feet on them?
I do agree value with be lower if dead but really no higher or you could tell everyone who buys it "its new".