It is a lot of 10 replacement batteries for game cartridges : Nintendo
NES, Super Nintendo (SNES), Nintendo 64, Sega Mega Drive / Genesis, Sega
32X and a 3.8mm Gamebit to open Nintendo cartridges. I also have for the
same price an annunce with a 4.5mm Gamebit to open Sega cartridges. (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 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.
I have a lot game/accessories for retro and recent consoles on my shop !