Mercury-Cell Battery Adaptor

thingiverse

A simple 'battery adaptor' to allow 4 LR44 batteries to be used in place of a (mercury, hence discontinued) PX-32 cell. The PX-32 has a voltage of 5.6v whilst the LR44 stack will produce 6v. For some cameras this is Ok (i.e. my Yashica Electro 35), for others, the over-voltage may affect the metering adversely. PX-32 dimensions (from http://www.photoethnography.com/ClassicCameras/batteries.html) 17mm diameter 44.5mm height LR44/SR44 dimensions (from https://en.wikipedia.org/wiki/LR44_battery) 11.4±0.2 mm diameter 5.2±0.2 mm height Print Settings Printer: HicTop 3DP-12 Rafts: No Supports: No Resolution: 0.2mm Infill: 20% Notes: Ideally this should be printed vertically so that the small cutouts have more strength to spring apart and hold the battery, however when I tried to print it, the print was knocked over when printing the final millimetre, so I ended up printing it lying down. You can see in the pictures that the one of the spring holders snapped off on first use! Still, it does work. As you can see, I also used a (4mm) brim to make sure it stuck to the bed - otherwise there's not much contact area with the bed To complete this, thread an 8mm wide piece of aluminium foil from the bas of the battery compartment to the base of the adaptor — check the pictures :)