HP48 battery spring foam replacement

If you have an old HP48G, HP48GX, or the like, you may have noticed that the foamy things that are supposed to provide spring tension to the two battery compartment connectors, lose their springiness over time, especially if you have used batteries that are somehow longer than they are supposed to be (maybe this happened in my case because I had left the batteries in there for too long and they expanded).

Here is a simple solution: just print new springs in a sufficiently elastic filament like TPU. It should suffice to replace only the bottom left foam. This, as well as the positive terminal spring, should provide enough spring force to push the batteries against the other connector even if its foam is completely flattened. If not, replace that one as well.

This must be printed in an elastic filament. I have printed it in NinjaFlex at 0.2 mm layer height with a single 0.40 mm perimeter, 1 bottom layer and 2 top layers, with 10% gyroid infill, infill extrusion width 0.35 mm. That'