Researchers have developed a new batteryless cardiac pacemaker which is based on an automatic wristwatch and is powered by heart motion. 'Batteries are a limiting factor in today's medical implants. Once they reach a critically low energy level physicians see themselves forced to replace a correctly functioning medical device in a surgical intervention' said Adrian Zurbuchen from University of Bern Switzerland. 'This is an unpleasant scenario which increases costs and the risk of complications for patients' Zurbuchen said. Zurbuchen has now come up with a way to power a cardiac pacemaker with an alternative energy source - the heart motion.