How long do the batteries in an original Gameboy and color cartridge last? - Quora
Question - Soldered Battery to a Gameboy Advance game PCB, but it still cannot save | Tom's Hardware Forum
Game Boy Advance Cartridge Battery Replacement - iFixit Repair Guide
How to Change Your Game Boy Cartridge Battery (Quick & Easy) - Howchoo
How to make your old Game Boy as good as (or better than) new | Ars Technica
How to change a Game Boy game battery without soldering - Gamer By Mistake
How to Spot a Fake (Pirated) Gameboy Advance Cartridge
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.
Battery replacement...can't save game fix : r/Gameboy
How to Change Game Boy Cartridge Battery : 8 Steps (with Pictures) - Instructables