The file 'Battery Box 21700 Stackable 3D Printer Model' is (stl) file type, size is 1.3MB.
To Combine two boxes, you need two M5x60mm hexagon socket head cap screws, 4 washers 1mm thick, 10 OD, 5.5 ID, two M5 nuts and the two printed spacers.
The top is closed via 2 round magnets, 10 mm OD and 3 mm thick. I glued them in with hotglue.
If you dont want your batteries jumping around inside, put a bit of paper or something else with a bit of flexibility into the bottom. I used some sort of gluable gasket/seal for doors.
Case_21700.stl | 3.0MB | |
Spacer.stl | 152.8KB | |
Top_21700.stl | 2.3MB |