Nuclear battery lasts a lifetime: Smartphones never have to be recharged

Equipped with a nuclear battery, pacemakers, smartphones and other small electronic devices would ensure power supply for decades. Su-Il In, professor of energy technology at the Daegu Gyeongbuk Institute of Science & Technology in South Korea, has now presented such a storage system. "The carbon isotope 14 (C14), which emits beta rays, is used as a fuel for an extremely long period of time. After 5730 years, only half of the atoms have decayed.…