Recently, I wanted to test a Pokémon Ruby cartridge I’ve had lying around for a while. It had quite a lot of playtime on it, so I was keen to see if the save data was still intact. After powering on the GBA, I was greeted with an unfortunate, but somewhat expected, message.

GBA message

Pokémon battery warning message

GBA old battery

Old blue clock-battery

The internal clock-battery had run dry, a common problem with these kind of cartridges. Luckily, an empty battery doesn’t prevent you fro