Holds multiples of 3xAA or 4xAAA. Print in place hinge. I've provided 1x, 2x, and 3x variants but you can change the compartments user variable in the Fusion360 archive to get as many as your print bed will fit. I expect to mostly use the 1x variant except for my flash which will use the 3x.

Designed for 0.3mm layers, use 0.15mm for smoother curves. Shouldn't need supports.