Never end up searching for some AA-batteries and just finding AAA!!!! This adapter fits over any AAA battery and brings it to the size of a normal AA battery. It´s that simple ;)

And I kept it simple! Two pieces:

1x Shell (sizes fits every AA and AAA IEC-Norm-Battery-Size)1x Contact-Plug (for conductive fillament or just replace the plug with anything conductive you can find and shape in your workshop -4.5mm in diameter- Be creative!!!)

Third file is a slightly diffrent plug for multimaterial prints with conductive filament to provide more contact between shell and plug.

It works because AAA and AA Batteries have the same Voltage (but to be on the safe site: Its your risk! I am not responsible for any damage to your electrics powerd with my adapters and AAAs instead of AAs)

Have fun with it!