AAA to AA battery adapter

thingiverse

An ingenious design for a human-made aaa to aa battery converter has emerged. By carefully cutting an m4 screw down to just 6mm in length, it can be easily installed into the device's case where it protrudes outward from the top. With a few careful drops of superglue applied to the area, this clever solution ensures that the screw remains securely in place and does not come loose over time.