18650 battery holder for aaa battery spring plates

thingiverse

In an older project i used a 18650-batteryholder that put pressure on the contacts by plastic-based springs only. Over the months those springs lost tension, got loose and caused my electronics to switch off. So i decided to redesign the battery-holder for using real metal springs. I got some spring plates for AAA batteries lying around here (available at https://www.ebay.de/itm/134133349790?var=433577399272 ), so i adapted my design to these. I created the design with openscad and after the design worked for me i started reworking the code so that the design ist parameterizable via some variables at the top of the file. This has not been reviewed yet but could be used to create holders for 14500 or 21700 batteries by only changing these parameters.