Tube Battery Adapter for 18650
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This is an adapter to use 18650 batteries in place of most any tube style batteries.The included OpenScad script has…
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This is an adapter to use 18650 batteries in place of most any tube style batteries.The included OpenScad script has support for D cells and C cells in the script. Simply uncomment which ever battery type you have, and comment out the other. The length of the tube is based on the num_cells value.
If you need to create a holder with a different outer diameter, add a new block containing your desired values, as so;
cell_diameter=XX;
cell_length=YY;
Be sure to comment out any other cell_XX blocks.
I built this in order to upgrade my very old Maglite that used 3D cells and an incandescent bulb. I replaced the bulb with an LED upgrade that works from 4~24 volts. I got the LED bulb and the battery clips off Amazon.
I've included STLs for 2~7 D-cell and 2~7 C cell.
You can create a tube to use some other cell types by modifying the battery_diameter variable.
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