Battery pack case for three AA cells with switch
A compact holder for three AA cells side by side, with a slot for a standard 19 x 13 mm slide switch and a wire exit, giving a 4.5 V supply for LED strips, small motors or a breadboard project. Each bay is 14.8 mm wide and 51 mm long with pockets at each end for spring and flat contacts, separated by 1.2 mm ribs. The lid slides on with a dovetail and a 3 mm hole routes the leads. Walls are 1.8 mm and the pack prints without supports.
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Design a battery holder for three AA cells side by side. Bays 14.8 mm wide, 51 mm long, 1.2 mm ribs, contact pockets 6 mm deep at each end, 1.8 mm walls. Cut-out for a 19x13 mm slide switch, 3 mm wire exit on one end, sliding dovetail lid.