Audi, for instance, unveiled the E-Tron, a lithium-ion battery-powered sports car with four electric motors: one on each hub. The car can hit 100 kilometers an hour in 4.8 seconds and includes energy-conserving technologies, such as a heat pump instead of a conventional air conditioner. Sanyo makes the battery.The company plans to put a prototype on the road by the spring of 2010 and put "a series of these cars" onto the market in 2012.Next year Audi will release a Q5 hybrid with lithium-ion batteries
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