Click on the photo for a high-res gallery of the Toyota Hybrid-X concept

A couple of weeks after reports first came out of Japan that the next generation Toyota Prius would stick with nickel metal hydride batteries instead of switching to lithium ion; the Wall Street Journal finally noticed. The tendency of lithium ion batteries to run hot seems to be Toyota's main concern, especially in light of their recent quality issues such as the Tundra engine failures. The lithium batteries have the potential to substantially improve mileage and emissions, an advantage which will be sacrificed for quality and safety concerns.

[Source: The Car Connection via Hugg, thanks to Linton for the tip]

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