18650 Battery Spot Welding Jig for Workshop Tools

Design preview. Rendered from the file, not a photo.

The maker says it fits: 18650 battery cells. See the proof

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What it does

Holds 18650 cells steady so your welds stay clean and centered every time
Simple design works fast, so you finish battery projects without frustration
Adjusts to fit AA cells too, giving you one tool for multiple battery sizes
Made from 3D-printed parts, so you get a custom jig delivered to your door

You want to spot-weld 18650 batteries without fumbling or bad welds. This jig holds your cells rock solid while you work, so every weld comes out right.

The design is simple. Two inches tall, it grips your battery and keeps it in the exact spot you need. You can shorten it to fit AA cells too. No guessing, no slipping.

Perfect for anyone building battery packs in their workshop. Get the precision you need without the mess.

4.7k downloads in the maker community. That is interest in the design on the site it came from, not our sales.

What it fits

The maker says it fits: 18650 battery cells

That is the maker's word, not a fit we measured. Check the size below against your own.

18650 battery cells (model 18650)From the maker's own listing title, checked 2026-08-13. See the original post

Brand names here only say what this part fits. We are not connected to those companies, and they did not make or check this part.

What you get

This design prints as one piece.
Nothing else to print or buy for this to work.

What it is made of

Designs like this print well in PLA. Compare the materials.

Printed plastic is strong for its size, but it is not metal. We have not load tested this design, so we do not publish a weight rating. Keep it out of a hot car and away from open flame.