Can you add a battery to a bootleg Pokemon cartridge? Got this for xmas from my wife who didn't know it was fake. : r/Gameboy
List of Game Boy Colour games that use a save battery
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How to replace a GameBoy cartridge battery without losing saved data - Gamer By Mistake
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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.