Single AA-cell to D-cell battery adapter
thingiverse
Primarily designed to complement the D-cell adapters that came with our Eneloop rechargeable kit. Driven by Seadevil's refined "brass fastener" design, this was an entirely new creation from scratch in Fusion 360. I streamlined the number of fins for faster printing, and incorporated a bit of spring into the inner edges to reliably hold a wide range of AA cells consistently.
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