Does replacing the battery in carts devalue them?

[RASK1904]

I've had to change one battery. It was Legend of Zelda Oracle of Ages. I think I took it out of Mario Tennis. Both for gameboy color. Also once I bought Metroid Zero for GBA off Ebay and got it and the battery was dead. I opened this up and I don't unedstand where the battery is? So I went to EB games and bought another one. Then returned the broken one to them. (I don't like them.) I didn't want to pay for return shipping.

I would think one with a new battery would be worth more. Kinda like a NES with a new 72 pin connector. Also it's a service your paying for.
Thanx RASK1904

[CosmicMonkey]

I'd rather have a CPS2 game with a battery that's been changed recently. Even better, I'd have a battery-free Phoenix CPS2 cart. Having Progear or AvP die really isn't a good thing.