It is run by a nanogenerator, which harvests energy generated as the heart beats and converts it into electricity.
The “symbiotic pacemaker” was developed by Chinese scientists who have tested it successfully in pigs, whose hearts are about the same size as humans’. In the trials it was capable of correcting an abnormal heartbeat.
More than half a million Britons have pacemakers, which were first used in the 1950s. Their batteries are still bulky, and typically must be replaced every 5 to 12 years.
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