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AAA to AA Battery Adapter

AAA to AA Battery Adapter

thingiverse

I'm low on AA batteries but have plenty of aging AAA ones hanging around so I whipped up an adapter to use AAA batteries in products that require AA batteries. Just print out the STL, grab some aluminum foil or copper duct tape, wrap it around the negative terminal extender and slide it into one end of the adapter. Then slip your AAA battery into place and you've got yourself a AA Battery.

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