How to change a Game Boy game battery without soldering
Amazon.com: 12 Pack CR1616 Battery, CR1616 3V Button Cell Lithium Battery with Solder Tabs for for Pokemon, Gameboy Color, Gameboy Advance Game Battery Replacement : Video Games
Gameboy: Cartridge Battery Mod - Game Save Battery Holder Hack - CR1220 - YouTube
How to Change Your Game Boy Cartridge Battery (Quick & Easy) - Howchoo
Gameboy Game Battery Replacement – Retrohandheldcustoms