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surge protector
This term refers to a specific piece of hardware used to safeguard sensitive electronics. It is often confused with a standard power strip; however, while all surge protectors may look like power strips, not all power strips provide surge protection. A basic power strip merely expands the number of available outlets, whereas a surge protector contains internal components to divert excess voltage.
In technical contexts, these devices are categorized by their joule rating, which indicates how much energy they can absorb before failing. Users should be aware that surge protectors degrade over time as they absorb spikes, meaning they eventually lose their effectiveness and must be replaced to maintain equipment safety.