About: I'm an amateur DIY-er, but thoroughly enjoy new concepts and ways of creating new things or just amping up old things. I almost always forget to document the projects I work on, but when I do I love posting th…

Do you have an original Game Boy (GB) game, or a Game Boy Color (GBC) game? One that you've spent days of play time on, won so many achievements with, or just can't part with the saves you have on there? If so, it's more than likely (almost guaranteed) that there is a battery inside that old game cartridge, and if it's never been replaced, is finally going dead. And that means bye-bye saves!

So with that morbid news, what do you do now? Well, that's what this Instructable is for!

After many searches of Google, and some questionable posts by questionable people, I ran into several ways to be able to replace that decrepit battery in the cartridge that is loved so dearly without losing the savestate, but they were somewhat vague and not really what I was looking for. So after seeing these things, I thought to myself that there's got to be a better way, and figured "What the heck? Why not give it a try?"

And surprisingly, it works!

So if you're ready to replace the battery in your Pokemon game or Wario Land cartridge without losing the precious saves, then read on!

NOTE: Pokemon, GB, GBC, GBA/GBA SP, Nintendo, etc. do not belong to me (clearly, otherwise I'd be rolling in mountains of cash). In no way do I claim ownership to these things.

NOTE #2: This project is of your own doing. I am in no way responsible for any problems that may occur in doing this procedure. So that means you can't sue me. I think.

***EDIT NOTE: jmetal881 was nice enough to point out in the comments that it's not a good idea to solder the battery to the tabs because of the heat (it could potentially melt the battery). Just be aware of the dangers that could happen if you do solder the battery! Also, as an extra emphasis, DO NOT TOUCH ANY OF THE CIRCUITS OR BATTERIES WITH ANYTHING METAL WHILE DOING THIS! ALWAYS COVER YOUR TOOLS! Or else death awaits your precious game! :)