Hi ToddW,
Did you know you can get converters though, to run 4 AA as a D and 4 AAA as a C
That makes a lot of sense. Putting 4 AAs in a D converter is certainly better than putting a single AA inside a D and then selling it as a D with a 400% mark up.
http://www.naturalnews.com/PhotoTour_Energizer_Batteries_1.html