Associated Press
In this January 14, 2011 photo provided by the Argonne National Laboratory, process engineer Bryant Polzin fills an 18650 lithium-ion battery cell with electrolyte using semi-automated equipment at Argonne's Cell Fabrication Facility in Lemont, Ill. It’s been nearly a quarter of a century since the last big jump in battery technology, which led to the lithium ion. To make the next breakthrough in battery technology, researchers have to master complex chemistry, expensive manufacturing, detailed engineering, a variety of different materials, lengthy testing, stringent safety standards, and giant cost problems. (AP Photo/Argonne National Laboratory)

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