Since early last year, two companies -- the Watertown, Massachusetts startup A123 Systems and Compact Power, Inc., a division of LG Chem -- have been battling for the contract to build lithium-ion batteries for General Motors's Hail Mary, the Chevy Volt, an electric car with a small gas engine on board for backup.
GM has yet to officially announce the winner, but Reuters reports that Compact Power is the victor. From our current issue, here's a look inside the fight to power the Volt.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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