Almost 1/2 the energy density of gas (Score 4, Interesting)

This thing 'theoretically' has more than 5kW-hr/kg, which is a big deal considering gasoline has an energy density of 46.9Mj/kg or 12.9kW-hr/kg. Coupling this new battery, when it exists, to a decent brushless DC motors, which are upto 90% efficient, then you'll have a purely electric car that can rival a gasoline powered cars in terms of power and range since IC engines are only 40% efficient (minus more energy that is absorbed in the transmission, etc). And I have a hunch that lithium is more abundant than crude oil. Downside is obviously with the higher energy density, the potential for fire/explosion is bigger. I don't know about you guys, but watching a shorted lithium polymer battery pack is very entertaining and dangerous.