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　　Northwestern University focuses on design and modeling; the University of Illinois champagne is responsible for the manufacturing of experiments and new batteries. The design of radio power can be described as a major challenge in the research and development process. Now, scientists have made small high -performance batteries through smart "space filling technology". In the past, they usually used the "pop -up" technology when constructing stretching circuits, and used metal wire as a bridge to connect tiny circuit elements to form arrays. When the array was stretched, metal wires would pop up and expand, so that flexible flexibility will be flexible. The circuit can be bent freely, retractable and twisted. However, the limited space determines that the technology cannot be used between the battery components, so the manufacture of retractable batteries requires another way. To this end, scientists use metal wire to connect into a longer waveform line to fill the small space between battery components. The lines connected to the component are large "S" shape, and there are many small "S" metal wires. When the battery is stretched, the big "S" will be stretched and disappeared first. It will disappear with stretching, and the connection between 100 parallel electrodes will become closer. This is the key to the new battery that can extend to 3 times its size.

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