Mine is definitely the AAA size but I git it from KD. The p/n is NBC-A001. Mine is gray & says Nano on it but the case differs in shape & color from the gray Nano AAA charger that I bought from AW (which I gave to a friend). So I say 3 versions. The one I have, the common one that AW sells, & the black one.
Maybe they screwed up on mine & put the AAA size bay on a R123 charger when making it? The believe 200ma version has a different p/n from mine. Regardless, my nano doesn't charge my 10180 batteries anyway. Light turns from green to red when the battery is inserted but no power output. :thinking: