Aquarium Thermometer Ring - allows battery replacement
Description
These little thermometers are really cool, accurate, and cheap. You can find them on Amazon. But they are plastic-welded shut and not designed for battery replacement. Print this ring in flexible TPU, break the weld open at the seam, replace the battery with a standard watch battery, and seal it back up with the printed ring. It's just a friction fit. No need for glue. Mine contained a CR2016 battery but you should probably check yours before buying a replacement. The TPU part looks like it was meant to be there, and keeps the device out of the landfill. Print with the smaller diameter down on the bed. No supports required.
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