It is a replacement battery for game cartridges : Nintendo NES, Super Nintendo (SNES), Nintendo 64, Sega Mega Drive / Genesis, Sega 32X. (I also have batteries for Game Boy, Game Boy Color and Game Boy Advance games, please look at my other items).

If your game have saving problems, it's probably because the battery is empty, you need to change it to fix the problem.
Changing the battery is very easy, you have to desold the battery on the cartridge and sold this one in the same place respecting the polarity.
To open the cartridges, you need a 3.8 mm Gamebit (Nintendo cartridges) or a 4.5 mm Gamebit (Sega cartridges) that you can find in my shop.

The extremities will be folded to facilitate the transport.



I have a lot game/accessories for retro and recent consoles on my shop !