The file 'Dnipro-M 20v Battery Adapter 3D Printer Model' is (stl) file type, size is 37.6KB.
Simple adapter to wide-spread in Ukraine 20V batteries from Dnipro-M. Contacts could be made from nickel tape (that used for welding 18650 elements), or box cutter blade.
dniprom-20vadapter-mini-v2.stl | 191.7KB |