Eventually the batteries in my carts will go out and I want an easy way to just open the cart and slip a new CR2032 in. The electrical tape method is looking more nasty everyday and when its hot here in Texas that stuff gets nasty and sticky. So I was looking at some of these battery holders : http://shopping.microbattery.com/Par...GnL!-193810589 and was wondering how easy would it be to solder one of these into a SNES cart. Ask for the Gameboy Carts, I'm wondering if this particular one would be too big, so which would be the best for Gameboy, there seems to be a whole lot of coin holders so it's hard to choose. http://shopping.microbattery.com/s.n...ategory.708/.f