In a rare revelation Ford unveiled the fact that there new Ford Focus electric batteries cost about $15,000 - $20,000 per car. Of course the focus ev is using pretty much the best commercial production batteries to date this is still a huge part of the big price currently on the Ford Focus electric. Hopefully these cars will become more popular so there is lots of incentive to lower the price and make them more accessible. I think there are lots of programs working towards lower battery costs so we should improvements on price points in the future!
http://blogs.wsj.com/drivers-seat/2012/04/17/ford-reveals-how-much-electric-car-batteries-cost/
http://blogs.wsj.com/drivers-seat/2012/04/17/ford-reveals-how-much-electric-car-batteries-cost/