How to change a Game Boy game battery without soldering
my copy of pokemon silver cartridge shipped with a bad save battery. i'd only be able to get to the fourth gym or so before the batteries in my gameboy would die.
How to Replace the Battery in a Pokemon Gold/silver Gameboy Cart : 4 Steps - Instructables
Hardcore Gaming 101 - Blog: Replacing a Game Boy save data battery
Gameboy: Cartridge Battery Mod - Game Save Battery Holder Hack - CR1220 - YouTube
Game Boy Advance Cartridge Battery Replacement - iFixit Repair Guide
Give Your Classic Pokémon Eternal Life with This Game Boy Cartridge FRAM Mod - Hackster.io