While battery tech is far from the "endless battery" of our dreams, it turns out one already exists. Your body generates enough energy to power wearables, medical sensors, and implanted devices—and tech designers are plugging in: https://www.wired.com/story/the-battery-that-never-gets-flat/?utm_source=twitter&utm_medium=social&utm_brand=wired&utm_social-type=owned : Jacqui Vanliew/Getty https://t.co/TAKT2XpdHu
