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News Link • Science, Medicine and Technology

A Pacemaker Powered By Heartbeats

• http://www.popsci.com, Flora Litchman
 A pacemaker’s battery needs to be swapped out about every five to eight years, requiring surgery. Engineers are now working on a device that converts the mechanical energy of a beating heart into electrical energy and could last indefinitely. A prototype tested in farm animals has generated a microwatt of power, enough to keep a pacemaker going.

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