I had an issue where I could not continue on my Pokemon Silver Version for the GameBoy. So I learned how to fix it and that was by replacing the battery. You can easily buy the batteries online to replace them and they are not that expensive. This will also work for any other cartridge based games that will not save. It is worth noting that the battery is what makes the save state remain on the card, so by removing it or by it going dead, the memory will be wiped and all save data will be lost.
Tools:
Battery and security screw kit: [ Ссылка ]
This is the cartridge kit that I own: [ Ссылка ] however, it doesn't come with batteries so you would need to buy the Game Boy batteries separately here: [ Ссылка ] (I wish they sold them in smaller sets)
If you do not have a soldering kit, here is a relatively in-expensive soldering and de-soldering kit, it will have the pump, iron, and solder needed for this project: [ Ссылка ]
Twitter ► [ Ссылка ]
Website ► [ Ссылка ]
GitHub ► [ Ссылка ]
