Stackable AA battery holder (NO-JAM remix with battery path, higher model)

thingiverse

I too noticed how the original results in pressure jamming the batteries from egressing. So I figured if the batteries had a clear guide to follow inside the holder instead of being piled up, they probably would not jam. Raised the retainer lip in front (because of what is now considerable force applied on the battery in line for picking). This took me 2 hours in Blender and it's possibly full of errors because it was basically the first thing I adjusted in Blender with no prior cad/3d experience. It prints fine, nothing special to do, just reuse the AA letters from the original project as those haven't changed in size. How I Designed This Painfully, by drawing mock batteries in Blender, then making a bunch of wedges on each piece of the battery holder and adjusting them so that they looked kinda straight and the right length and angle. No science involved - exclusively relied on "fiddling around with it".