I've been on a kick replacing batteries in my cartridges in order to prolong their lives.
Usually, this is a pretty simple matter; I have the game bits required for standard Sega and Nintendo carts... but when I looked at my copy of Might & Magic for Genesis, I realized that I don't have a bit that will fit it. The screw design is apparently called a "tri groove" but I can't find more about it than that; it's a screw with three indents but with a spot in the middle sticking up preventing me from using the kind of screwdriver I'd normally use to open a Game Boy.
I don't really know too much about the technical specifications of different bits & screws, but does anyone have an idea as to what kind of tool can be used to open that thing?