why the fascination with batteries? I recently bought a sekonic studio deluxe III model L398A--- no batteries, supreme accuracy, incident or reflected, the dome swivels 180 degrees, is the size of a pack of cards and not much thicker.
and no batteries to replace. I bought this one because my old one, which was 40 years old, finally had so many broken pieces of the exterior from being dropped that i was worried dirt would hurt its accuracy, which never faltered.
Glad to know that a selenium based meter has supreme accuracy.