For this museum post we have a couple of National NEO Hi-Top AA batteries.
These batteries have been sitting in this Genesis Control Pad box for probably at least 20 years. I don’t even remember where I got them from – based on some googling and finding out how old they are, it would seem that most likely I brought them over from Hong Kong when we first moved here (though the “05:97” and “05:98” markings on the batteries suggest they could be from the 90s). They could have been inside one of my mini-4WD racers, or a Lego Light & Sound unit. I know for sure that I didn’t get them in the U.S.
I was originally planning to toss them out after putting them in the museum, but now that I see how old they are I think I’ll leave them on my bookshelf for a while. As you can see from the pictures, they’ve held up pretty well over the years, with no leakage or bulges. Maybe they really do not make them like they used to!