Breakthroughs in battery technology could make 2007 the year that electric cars finally come into their own. The company claims that their battery shows a cycle life in excess of 20,000 charges and discharges while still retaining 85 per cent of its capacity to store energy. Altairnano's data show that their battery has a power density of 4,000 w/kg and the ability to safely operate from -50° C to 75° C. Each credit is worth US$5,000 (about AU$6,500), so a type 3 vehicle is worth US$200,000 (about AU$260,000) in California. Carmakers either have to build their own type 3 vehicles...