We evaluated them based on ease of use, their features, and how they performed in various situations. We plugged these power strips in and tested them in kitchens, family rooms, workshops, and offices. We research the market, survey user reviews, speak with product managers and engineers, and use our own experience with them to determine the best options. The power strips on this list have been thoroughly vetted and evaluated by our test editors. Always check with the manufacturer, they usually provide examples on the packaging of what a certain model can protect. To adequately protect an average home entertainment system or computers and related equipment, look for surge protectors rated in thousands of joules. One joule is about the amount of electricity used to light a one-watt LED for one second. A joule is a unit of energy required to do a certain amount of work. The amount of protection surge protectors provide is measured in joules.
However, their need drops off quickly once they’re running, which can cause surges elsewhere in the house’s wiring. Air conditioners, compressors, and electric ranges require a large amount of power, particularly when they start up. The other common cause for surges occurs within your own home. When the power company’s transformers and complex switching systems try to reroute power or address changing demands, it can create inconsistent power flow with dips and bursts. More commonly, power surges are caused during storms when power lines are downed. Most surge protectors can’t handle anything this large, so don’t rely on them during lightning storms-the best way to protect from this type of surge is to unplug your sensitive electronic equipment. People tend to worry most about lightning strikes, which can find their way to electrical wires and cause power spikes in the millions of volts. Power surges can occur due to a number of reasons. So, to be sure you’re getting the most protection you can, it’s a good idea to replace them every two to three years.
With every voltage fluctuation they absorb, their lifespan is shortened. What most people don’t realize about surge protectors is that they wear out over time. The proliferation of wireless handheld devices that charge at lower voltages makes surge protection more important than ever. Tilt the connector away from the computer to disengage.What You Need to Know About Surge Protection Additionally the AC cord and AC plug style may vary based on your country.Ģ. Note: The connector on your Power Adapter may vary based on your computer. Similarly, avoid prolonged contact between yourself and the adapter brick when the adapter is in use. Avoid thick carpet, bedding, or furniture that would impact airflow on the adapter as those items may trap heat radiated from the adapter case.
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When the connection is secure, an LED located at the head of the DC connector lights up an amber light lets you know that your notebook is charging, while a green light tells you that you have a full charge.ĭesigned to be the perfect traveling companion, the adapter has a clever design which allows the DC cable to be wound neatly around itself for easy cable storage. In addition, the magnetic DC helps guide the plug into the system for a quick and secure connection.
It also helps prevent fraying or weakening of the cables over time. The 45W MS Power Adapter features a magnetic DC connector so if someone should trip over it, the cord disconnects harmlessly and your MacBook Air stays put safely. AC Power Adapter for Macbook Air 11" & 13"Ĭompatible to models from 2007 to 2012.06