A123 Rises as Army Testing Its Batteries in Prototype
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A123 Systems Inc., a U.S. maker of lithium-ion batteries for electric cars, rose the most in more than three months after the U.S. Army introduced a prototype vehicle that uses its products.
A123, based in Waltham, Massachusetts, rose 17 percent to $1.12 at the close in New York, the biggest gain since Jan. 3.