Swiss researchers built a living battery made of fungi that feeds on sugar and dissolves itself when the job is done, and it can already power a sensor for days just by harnessing the natural metabolism of two complementary fungal species printed alive into biodegradable ink

Swiss researchers built a living battery made of fungi that feeds on sugar and dissolves itself when the job is done — already powering sensors for days.

Most batteries are rigid, toxic, and destined for a landfill. They’re charged, depleted, and discarded. At Empa’s Cellulose and Wood Materials laboratory in Switzerland, researchers have spent three years building something fundamentally different — a power source that’s alive, needs to be fed, and breaks itself…