Is this fan strong enough for a whole room?

No. The 5.5-inch head moves air over a short distance, so it works best aimed at one person at a desk. For room cooling you need a larger fan.

Can it run from a power bank?

Yes, any USB power source works, including power banks and laptop ports. Runtime depends on the bank's capacity.

It is USB powered, so it runs from a cord rather than an internal battery. It stops when unplugged.

Low speed is quiet enough for an office. The top speed is audible but still modest for a fan this size.

The head sits on a small stand. Check the specific model for tilt, since many mini USB fans have a fixed or limited angle.

At Best Buy, for $62.33, as of our latest check.

$62.33at Best BuyChecked Nov 13

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