Emisar D18 Spacer for flat top batteries
thingiverse
A spacer to use flat top 18650 batteries in the Emisar D18, without taking the polarity protection ring off. Hard to get high quality button top 18650 batteries where I live. Takes 10mm diameter cylindrical spacers, taller than 2mm. I used some spare neodymium magnets but brass or copper spacers would be ideal for reduced electrical resistance. FreeCAD file allows customization for smaller spacer diameters, 10mm is the biggest that'll work without being too fragile.
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