Imagine this: It’s a hot summer day and while you would like to stay cool inside, Fido’s begging for a walk. Out and about, you’re listening to your favorite true crime podcast when disaster strikes—the trill of a perilously low battery. With no portable charger on you, you almost panic, but then remember your handy stash of microbial batteries, tiny paper-thin squares containing electricity-producing bacteria.
Image: CREDIT: XINYING LIU
