Originally Posted By: Larry Kehl
OK just a thought: does anyone know with certainty if a SD-2 does or does NOT have a CR-2032, CR-2016, BR-2325, or similar internal battery?

I just took my SD2 apart, having nothing to lose at this point. I don't see a battery. There is a fuse and a thing I thought at first was a battery, but it's actually a small 1000uF 16V capacitor which I messed up. (Took me a while to figure that out -- electronics isn't my thing).
Here's a picture of what's inside the SD2 if anybody's curious. A sticker says it was tested back in 2007. So it lasted at least 10 years.