If you resize this to hold other battery sizes, first print a 1x1 grid to test fit: wall thickness matters.
Print in vase mode, set a bottom layer thickness of maybe 0.6 or 0.8 mm, set wall thickness to something fat, I used 0.8 mm (while using a 0.4 mm nozzle). The non-vase-mode variant would take 10+ hours to print, this prints in less then 2 and can probably be even faster.
See pictures for before/after how it helped organize my battery drawer(s).
The author remixed this model.
modified to hold batteries, fit a larger drawer, and print in vase mode (so it prints significantly faster)