How frustrating to find yourself without a battery at the wrong time, on a day off, or in the middle of the night.
Now, thanks to this AAA to AA adapter, it's all over! All you need is 8g of filament and a paper clip and you're ready to go !

Instructions for use :
Print the adapter
Unfold your paperclip as shown in the photo
Slide the paper clip into the adapter
Fold the shorter end
Cut the other one and fold it too
And that's it, you've got your adapter!
Note that you can replace the paper clip with tin wire or any other conductive wire.