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A power outage and voltage fluctuations in the grid can damage electronic appliances. Electrical surges when the power comes back could ruin the internal structure of computers and other electronics. To prevent damage to your electronics, unplug important or large appliances, such as TVs and computers, as long as it is safe to do so. Investing in a surge protector ahead of time is one of the easiest and cheapest ways to safeguard them. A surge protector blocks excess power from your appliances and redirects it to the power lines or the ground. The best way to safeguard your home against voltage fluctuations is to install an entire-home surge protector along your electric line where it meets your meter. A certified electrician must complete this work.