AAA to AA & paperclip
thingiverse
My version of AAA to AA adaptor. Only extra thing you need is simple paperclip which will be used as contact. Paper clip needs to be cutted (lenght approx 12mm) and bended inside to secure the conductor. It doesn´t really matter if you put battery inside positive side first but fits little bit better on negative pole. Revision 15.12.2019 I´ve revised my previous design to improve functionality of this adaptor. a) improve tightness of the battery inside adaptor b) less material needed & easier removal of the battery from adaptor For side openings I took inspiration from Jovior (https://www.thingiverse.com/thing:2844079)
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