We've seen flexible displays for some time now, and engineers at Binghamton University developed an origami-inspired foldable battery. The folding part is great, but these batteries are also powered by bacteria and made from paper, providing an low-cost option for remote locales where resources are scarce. That all sounds good, but what are the potential uses? Well, paper-based biosensors have been around for a bit too, but they usually have to be paired with some sort of device to be of any use. The goal is to create tech that allows those sensors to power themselves. Currently, the battery folds down to about the size of a matchbook and costs five cents to make.