As the story goes, the rock band AC/DC took its name from a label on an old sewing machine in the Young brothers’ home. It must have meant that the machine could run on either alternating-current or direct-current electricity. Today, all the newfangled ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Dirty power is a loose term for alternating current (AC) that can vary in voltage and can potentially damage sensitive electronics.