My favorite zoomie is the ThorFire TA13.
Unfortunately, it's powered by one 18650, and it's been discontinued and I can't find anywhere that sells it...
The zoomie is pretty compact, though, which is what I wanted.
...
I think if you look for 18650 zoomies, you'll find something nicer than something powered by an AA or multiple AAA cells.
There's a big thread about zoomies that hasn't been updated much lately, but I think just about all of the recommendations are for lithium-ion cell powered flashlights.
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EDIT:
Here's the thread: