This was designed to print with no supports, it should fit the stock battery but I'm not positive it will. The only battery I have for my E-Mag was made by RM 3d designs, Ive never actually owned a authentic battery case. This was designed around the (RM 3d designs) battery. I'm also able to fit a lipo battery in the case in conjunction with the top battery piece. I had to drill a hole in the bottom to push the battery out because its a little snug.

Printing:

no Infil to add weight, no supports
top - Print flat, already scaled to fit nicely sanding may be needed

Full print with 4x4x4 walls/top/bottom and 20% infill.

Top piece may need minor sanding but should push fit into the battery box tightly and not need anything else to secure it.

MK3

Prusa i3

No

No

200

20