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The flexibility of this battery makes it a good fit for smart watches. Arizona State University uses Kirigami technique for a more flexible battery. (via ASU) When it comes to lithium-ion batteries, they're pretty limited when it comes to their shape, unless they're on the verge of exploding. But one research team at Arizona State University is in the process of creating a more flexible, stretchable battery. Using a form of Japanese origami called Kirigami, which includes a combination of cu ...