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When it comes to powering laptops and hybrid cars, batteries get most of the attention. But these gadgets and myriad others also contain devices known as capacitors that provide quick bursts of energy. Capacitors can't store as much power as batteries, but the latest “supercapacitors” have started to close the gap. Now, their storage capabilities may be about to take another big jump.
Robert F. Service (Thu,) studied this question.