Button cell / battery adapter - use a small one for a big one

thingiverse

Create a customized battery adapter with this design, swapping different types of batteries! Use an A13 zinc/air battery instead of a LR44 (or SR44) if you have them on hand; just ensure voltage compatibility (1.44V works but may not function properly compared to 1.55V). Measure battery diameters using a caliper or refer to this list, then use the customizer for your preferred size: http://www.thingiverse.com/apps/customizer/run?thing_id=31421. Alternatively, utilize Openscad tiny app for an easy process: input your diameters in the scad file and hit F6, then export as STL through the menu's Design option. For those replacing a smaller battery, the script handles adjustments. However, if your replacement is taller, redesigning the holding thing becomes necessary. Printing requires slow speed and low temperature to avoid melting, e.g., 210 degrees instead of 230. The settings for printing are print temp 210 with cooling enabled, minimal layer time of 10 seconds, layer thickness of 0.2mm, wall thickness of 0.8mm, 100% infill, and a nozzle diameter of 0.4mm.