Remix of "Customizer Box with Lid and screw holes" by strangeloop and "3x LR44 button cell holder" by enginuitor A small project box that holds three AG13 / LR44 batteries. Case generated with SCAD, combined with battery holder in Blender. Print with at least 25% infill. Insert the stripped ends of two thin wires (I used 0.14mm² stranded wire) into the holes in the battery holder. Bend the ends down, or loop them through the other hole. Try keeping the stripped end short, so the battery won't get shorted. Insert your project's board. Drill out the holes in the lid to 3mm. Use four M3-screws to close the case. If needed, drill the holes in the case bottom to 2.8mm, or use a different type of screw, e.g. a self tapping screw.