When talking about the (hopefully coming in 2010) Chevy Volt, Bob Lutz repeatedly said he was waiting on battery makers to provide GM with battery packs that were up to the challenge, seeing as the show car relies on technology that doesn't exist. GM isn't the only maker with battery issues -- Toyota has pushed back the introduction of lithium ion batteries in the next generation Prius, saying that they're not just not ready to be put in cars because of safety issues. There are independent companies that are installing li-ion battery packs into cars and getting stunning results. Toyota, though, in light of corporate liabilities and its recall record of late, simply can't afford to risk what would be a huge black eye if the next Prius suffered from a hasty misstep.

[Source: Winding Road]