This is printable battery holder for you li-ion batteries. I recommend PETG or ABS for produce. It's easy to produce with using 3d printer. Becarefull when assambly the battery parts. PLA is not good for battery holder(my opinion). If you want to more design about mechatronics or battery system, please contact with me. Im PHD student in Mechanical engineer and working with batteryes too much. I can help your university projects.

Best regards.