This isn't the first time we've heard that Toyota might spin off the Prius as a separate brand much like Scion. But we now have the most concrete news about the automaker's plans we've seen yet.

Chinese battery manufacturer BYD can now be mentioned in the same breath as Goldman Sachs: both have recently been given the blue-chip imprimatur by U.S. billionaire investor Warren Buffet. The Oracle of Omaha's MidAmerican Energy Holdings has bought a 10-percent stake in BYD for $230 million.

At a press conference on Thursday, shortly after announcing plans for a new engine plant in Flint, Michigan, General Motors CEO Rick Wagoner said his employer, "should be able to put to good use its portion of a $25 billion government loan package."

Click above for more hi-res images of the Dodge Zeo concept

While everyone is aware of what GM, Honda and Toyota have been up to when it comes to fuel-saving technology, Chrysler has been playing it close to the chest. The Auburn Hills-based automaker, however, will show its dealers three new all-electric cars at the end of this month that are said to be production capable. Jim Press, the Chrysler exec who came from rival and current hybrid-leader Toyota, added that Chrysler's future platforms were being designed with electrification in mind and that is still has access to technology from its previous owner, Daimler.

The Chevy Volt is unique in that its engine is really just a generator that produces electricity for the batteries, which then power an electric motor that turns the front wheels for propulsion. While the Volt powertrain is pretty spectacular, it may not be unique for long. British car site AutoCar is reporting that Mazda is not only interested in a similar setup for a future plug-in hybrid, but it already has a working prototype on the road. Mazda engineers told AutoCar that a battery pack charged by a rotary engine is already being used in a Mazda5 mule, and that management is encouraged by the early results but wants to see battery costs go down before proceeding.

Click above for more images of the Sunmotor EV

Click above for a high-res gallery of the Lightning GT.

This month will see the debut of the Lightning GT electric sports car at the British Motor Show on July 23. The nano-titanate battery pack will provide 740-HP and a 0-60 sprint in just four seconds. Those batteries have also been spaced around the car to give it a 48/52 weight balance, which could theoretically give it the kind of handling to match its looks.

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Somewhere, our pal Mike Bumbeck is smiling, because Mitsubishi has produced yet another vehicle worthy of its classic "Super Potential" slogan. No, there's no new-fangled Starion, unfortunately, but there is now an i MiEV police car. Mitsubishi has supplied one of the teensy EVs to the Kanagawa Prefecture police, who will test it through March of next year. Sure, it's not particularly intimidating, but it is (ahem) arrestingly cute. As mentioned at AutoblogGreen, we'd have had that battery pack power a set of on-board tasers, too. Talk about missed opportunities...

Mercedes -- like a lot of other folks -- believes oil is going to run out eventually. But instead of waiting until the "Low on Oil" light comes on, the brand behind the three-pointed-star has set a goal to convert its entire fleet to run on alternative fuels by 2015. That's seven years to get off the drink we've all been addicted to for well over a century.

As expected, presidential hopeful John McCain outlined a plan yesterday which would offer a $300 million cash prize to the first company able to build a better automotive battery. The proposal is part of an effort to reduce the nation's petroleum usage, in this case, by furthering the development of electric cars.