/vr/ - Retro Games

I was always curious how Game Boy PCBs managed to be so much smaller than NES / Famicom games. Even the GB port of Nobunaga's Ambition is the same uniform size as any other Game Boy PCB, whereas the NES version took up practically the entire height of the cartridge.

Are there any recommendations for button cell battery holders?

I have some game carts of various systems that need their batteries replaced, and instead of being lazy and just ripping the old cell off the tabs and taping a new one in place (see pic) as I've always done, I think installing button cell holders into all my game carts could be a good excuse to get some beginner soldering practice.

I'm just not terribly certain where you order stuff like this online.

Is the process for replacing a GB/GBC save battery similar to replacing a GBA save battery? I've a Pokemon Gold and an SMB Deluxe cart which both need new batteries, is it just go in, take the old one out, shove the old one in, or is there something more to it?