Cardiac pacemakers have seen a huge success in extending many lives. However, like The Economist pointed out in their article, the design of these lifesaving devices barely evolved since their invention in the late 1950s. Although patients rely on pacemakers to live a healthy life, their battery does not last forever. To solve the problem surrounding the device’s power supply, researchers worldwide are trying to conceive a battery-less pacemaker. And it appears that Yi Zhiran along with his team from Shanghai Jiao Tong University may have succeeded.