A Pacemaker Powered By Heartbeats

Illustration by Son Of Alan 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. The Parts A) Flexible polymer holds system in place. B) Piezoelectric ribbons harvest energy. C) Rectifier switches current....