Lifetime is key because of the high cost of battery packs.
Company representatives emphasized the huge potential of the smart-grid market.
You'll be able to plug in anywhere, but without a special connector, you'll wait forever to recharge.
Metallized xenon difluoride heralds a new class of solid fuels.
Their inventor won the Millenium Prize, but they need to be cheaper to provide large-scale power.
The money is part of loan guarantees administered by the Department of Energy.
The company's IPO adds $226 million to its coffers.
A new webpage provides numbers on how much oil is being recovered, and schematics of the technology involved.
It's impossible to say how much oil is still escaping from the stricken wellhead.
A riser cap is capturing a fraction of the leak as BP seeks to optimize an imperfect seal.