How a Gameboy cartridge looks on the inside – AllAgora
Game Boy Color - Cartridge Battery Mod - Game Save Battery Holder Hack - CR1220 - YouTube
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
How to Change Game Boy Cartridge Battery : 8 Steps (with Pictures) - Instructables