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How the Army Fit a Suitcase-Sized Battery Charger into a Shoebox

Nothing's worse than a dead battery—except maybe if you run out of juice while on patrol in the backwoods of Afghanistan. But until now, US forces have had to lug around a huge and heavy charger. Not anymore. Army research has just shrunk a mobile charging station small enough for any soldier to carry on assignment. »5/27/13 11:00am5/27/13 11:00am