Screw batteries, just implant a nuclear generator inside the body instead. Perfectly safe :) https://www.reuters.com/article/health-heart-pacemaker-dc-idUKN196

Screw batteries, just implant a nuclear generator inside the body instead. Perfectly safe :) https://www.reuters.com/article/health-heart-pacemaker-dc-idUKN1960427320071219 https://www.reuters.com/article/health-heart-pacemaker-dc-id...