Batteries have recently come in various configurations: stretchable, as discussed in R&D World’s article “Stretchable batteries and body-conformable electronics poised to advance in 2025,” and batteries using alternative chemistries, including lithium-iron-phosphate (LFP) and sodium-ion (SIBs), among others. One battery material that might not have been on your bingo card is fungi. Researchers at Empa have…