Take, for example, the government's chart on the "Forecasted Cost of a Typical Electric‐Vehicle Battery." In 2009, the DOE's Vehicle Technologies Program says, the cost was around $33,000. This will drop to $10,000 in 2015 and then keep sinking, all the way to around $5,000 in 2021 and $3,000 in 2030. The weight of a 100-mile automotive battery will drop significantly, too, the DOE predicts, from around 333 kilograms today to just 55 kg in the 2020-2030 timeframe.
All in all, it's an optimistic and encouraging document. Is it realistic? Well, that's what we're all waiting to find out. You can download it here (PDF). Thanks to Stephen B. for the tip!
[Source: White House (PDF)]