Engineers in upstate New York have invented a folded paper device that looks like a decorated art project. But don’t be fooled. This is actually a paper-based battery. No, it doesn’t look like any of those metal batteries running flashlights or smartphones. This alternative to electronics is based on paper. It represents a step forward in the field of papertronics (short for paper electronics). In these systems, the battery can be printed on a page. Well, most of it can: The battery’s power consists of living bacteria.