This means that those 2.628 kWh of electricity will cost about 34.1 cents over an entire year. That equates to 2.628 kilowatt hours (kWh).Īccording to the EIA, the average cost of electricity in the US is 12.98 cents per kWh. Let’s assume these are all plugged in 24 hours a day, 7 days a week, over an entire year. Aha! How Much Money is That?įinally, we have a measurement to work with: 0.3 watts.
#How much is an apple mac laptop charger pro#
The total vampire power draw of our power strip, combined with chargers for an iPhone 6, iPad Air, MacBook Air (2013), Surface Pro 2, Samsung Chromebook, and a Nexus 7 measured a grand total of 0.3 watts. We started plugging in chargers and watched the meter continue reading 0.0, even after several chargers were plugged in.Įventually-with six separate chargers plugged in-we arrived at a solid, measurable reading. The power strip itself-despite its red LED light-registered 0.0 watts when we plugged it in. Then, we could see just how many chargers it takes for the meter to be able to measure some noticeable electrical draw. With that in mind, we had a new idea-plug a power strip into the meter, and then plug multiple chargers into the power strip. And it should certainly be detectable at some point!
Each charger is using some fraction of a watt. It’s not entirely accurate to say that each charger was using 0 watts, of course. In other words, the meter’s display read a big 0.0 watts, no matter what charger we plugged into it. Having heard about the evils of vampire power and the need to unplug devices when we’re not using them, we were surprised to see that not a single charger used a detectable amount of vampire power when it was plugged into an outlet. It was immediately obvious there was a problem with the very idea of our test.
#How much is an apple mac laptop charger android#
We plugged in a variety of chargers-iPhone, iPad, MacBook, Android phone and tablet, Windows laptop, Chromebook, and even Nintendo’s 3DS charger. How Much Vampire Power Does a Charger Use? So, with a meter in hand and a variety of chargers lying around, we got to work and tested them so you wouldn’t have to. Look up the rate your electricity company charges you and you’ll be able to figure out exactly how much that electricity will cost you, too. This is very useful if you want to measure your energy use, allowing you to identify power-hungry appliances and devices that should be replaced or adjusted. The meter sits between the two and tells you how much energy the device is using. Plug the meter into an electrical socket, and then plug another device into the meter. They’re currently under $25 on Amazon, giving you an easy way to measure your devices, too.
We used a Kill A Watt electricity usage meter to measure the power usage of a variety of popular chargers. RELATED: The How-To Geek Guide to Measuring Your Energy Use
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