Permanently Deleted
related question:
Let’s say you have a saved game on a pokemon game cartridge
You know the battery will run out soon, and you want to replace it
However, the instant you remove the battery while the game is off, your data gets wiped.
Would it (theoretically) work to replace the battery while the game is running? Since the memory is being powered by the normal gameboy batteries (cylindrical double AA ones)
Absolutely not. You should never mess with a circuit board that is being powered. You couldn’t get inside cart while its being powered anyway.
If you want to keep your save, there are devices that you can buy that back up and/or write saves