So what is a surge protector, and when do you need one? A surge protector is an extension of your wall outlet: it has a single power cord but several (or many) outlets, so you can have a bunch of ...

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A surge protector can smooth out lower-level electrical noise that can damage, but not necessarily destroy, a computer. Electrical noise can scramble computer memory or lock up software.

Shunt mode and series mode are the two types of surge protection. The most common method is the use of a metal oxide varistor (MOV), which acts like a pressure relief valve to divert the surge to ...