Okay, thanks for all that.

Also, the Dreamcast does need the rechargable type, so thanks for catching that mistake. Seems mouser doesn't stock the one I need, so I'll have to find it elsewhere. Nor does Digi-Key, though I've never bought from them.

I've seen a couple of threads about Dreamcast batteries, but they all seemed to recommend DigiKey, who doesn't seem to have them. Anyone know where I could order a rechargeable 2032 battery?