> Did anyone do it themselves and try to de-solder the battery? Some guy at a vintage
> game store said one of their employees tried it and it popped the battery. The one
> time I did it I pried it out.
> I doubt they're good quality, but the dollar tree sells the batteries...
I've done a bunch of these for SNES games in my personal collection, but I actually install I a battery holder so you can just pop the battery out next time, and pop a new one in... you know, like in another 20 years when the new battery dies... shut up ok, don't judge me, it makes me feel like the cart is the best it can be! :D
I bought something like these in bulk:https://www.ebay.com/itm/CR2032-Battery-Socket-CR2...