The 4-Hour Body, Ferriss' treatise on using tracking to lose weight, maximize efficiency and "become superhuman, " shot to the top of the New York Times bestseller list in January.

FORBES: Magazine Article

Despite their safety risks, they are increasingly attractive to aircraft makers as a way to cut weight and thus improve fuel efficiency.

NPR: FAA Approves Resumption Of Boeing 787 Flights

Given today's materials and know-how, automotive engineers reckon a 10% reduction in vehicle weight yields a 6% improvement in efficiency.

ECONOMIST: Tech.view: Unbearable lightness? | The

Not only did he fail to carry his weight, he was a constant and serious drain on the Army's efficiency.

CNN: Private Ryan was a hero, but there were bums, too

A123 expects this to lower cost, reduce weight and improve reliability, providing automakers with a cost-effective solution that A123 believes will increases efficiency and minimize system complexity without sacrificing vehicle performance, battery life or driving range.

ENGADGET: A123 Systems' new lithium ion tech keeps EV batteries cool, your wallet in check