Mitsubishi to build lithium ion car batteries

Mitsubishi Heavy Industries aims to start mass production of lithium ion batteries for cars in 2010, Japan's largest machinery maker said Tuesday.

The rechargeable batteries would be sold to automakers for use in electric and gas-electric hybrid vehicles.

The car industry is abuzz with talk of the potential for plug-in hybrid cars, and lithium ion batteries are more compact than nickel metal hydride batteries, contributing to fuel efficiency.

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