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.
| Tube_Battery_Adapter_18650-2C.stl |
| Tube_Battery_Adapter_18650-2D.stl |
| Tube_Battery_Adapter_18650-3C.stl |
| Tube_Battery_Adapter_18650-3D.stl |
| Tube_Battery_Adapter_18650-4C.stl |
| Tube_Battery_Adapter_18650-4D.stl |
| Tube_Battery_Adapter_18650-5C.stl |
| Tube_Battery_Adapter_18650-5D.stl |
| Tube_Battery_Adapter_18650-6C.stl |
| Tube_Battery_Adapter_18650-6D.stl |
| Tube_Battery_Adapter_18650-7C.stl |
| Tube_Battery_Adapter_18650-7D.stl |
| Tube_Battery_Adapter_18650.scad |
