Battery Collar 14500 - C-Size
thingiverse
I needed an adapter to convert my 3.7V 14500 (AA) sized batteries into a NERF that only takes C-Sized batteries. I tried out adapters from Amazon, but my 14500 batteries are slightly larger than AAs, so they don't fit quite right. These collars make the outer diameter of my 14500s match up perfectly with a standard C-Cell.
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