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How many AA batteries does it take to leave a Mac mini on overnight?

About 11 AA batteriesA Mac mini idles at about 4 W, for 8 hours, and one AA holds about 3 Wh.

It takes about 11 AA batteries.

How we worked it out

A Mac mini idles at about 4 W, for 8 hours, and one AA holds about 3 Wh. Alkaline AA batteries, about 3 Wh each, and no energy lost on the way. Real life adds a little friction and waste, so treat the number as a solid ballpark rather than a lab result. The constants behind every experiment are on the science page.

Watch it happen

This was one of the five experiments in It Took #38. In the game you guess first, then the experiment plays out with your number: too few and it fails, too many and it overshoots.

Play It Took #38Play today’s experiments

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