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You could run AAA in the same battery box. If the batterys won't stay in place you just find something to wrap around them to keep them on the contacts. I've used C batteries in D devices that way...

I used to hang more things from it, now that I have a blackbird with a shelf I don't hang much. I'm going to have to look into rigging up a holder for my phone. I like that idea.

Here's a pic with...