This adapter allows you to make use of a BL1314 14.4V 1.3Ah lithium ion power tool battery by Black&Decker to power other projects. Should be quite useful since I have two of those batteries and don't use the cordless screwdriver that often.
I found that printing the thing in ABS makes it slide on easier. (0.2mm layer height, 30% infill...)
You can press any ~1mm thick contact plates into the adapter. I'm going to try flat connectors first and solder them on a small perfboard that will be bolted onto the printed part and connected to a buck converter.