This is a remix of a remix, it functions exactly like the wall mount AA and AAA battery holder by Merlin420 but requires absolutely no supports to print. I made these changes because I hate removing supports more than just about anything. :-)
I printed at 20% infill with PLA. It doesn't use that much filament but does take a while to print.
I have been thinking that the next step with this would be to add some hollowed out areas to the sides and back, maybe a nice honeycomb pattern to reduce the filament amount and time even more. But I decided it was negligible.