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Improving Efficiency in Power Supplies

November/December 2007
A version of this article appears in the November/December 2007 issue of Home Energy Magazine.
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November 05, 2007
Most office equipment and consumer electronic devices use external power supplies to convert high-voltage alternating current (AC) into the low-voltage direct current (DC) that they need to operate. The majority of these power supplies are far less efficient than they could be—their efficiency is on the order of 65%–70%. These power supplies consume about 2% of all electricity produced in the United States.

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