The surge protector on the floor behind your TV hasn't moved in years. Neither has the one under your desk. Both still power everything plugged into them, the lights are on, and nothing has ever gone wrong — easy to assume they're doing their job. They might not be. A surge protector can stop protecting entirely while every outlet keeps working normally. A unit from 2018 sitting in a storm-prone home could have burned through its useful life years ago without any sign of it.
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