You need a 5 volt DC transformer, with 300-350 miliamp source. I am using a cell phone charger. Works fine. Just check on the back of the base to check specs. I did the same thing, and assumed a/c. Went and bought a second fan, plugged into d/c charger, and works just fine. You also need to make sure that connections are proper, because the LED lights built into fan unit, wil not allow current to flow if reversed. Hope this helps.
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TO MUCH WORK TIME , TO LITTLE DRINKING TIME.
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