The fine folks at Aftonbladet and TrollhattenSaab.net may have stumbled on more than an interesting detail regarding the Saab 9-3 BioPower Hybrid concept shown at the Stockholm Autoshow. The Swedish prototype has been touted as the first hybrid to return nearly zero fossil fuel emissions, but it's drivetrain may have been hiding an even bigger secret: it might be a 220-volt plug-in.

As the story goes, the revelation was concealed, perhaps in order to reserve some news for the New York Auto Show. The question now is, if this is indeed General Motors' technology program for the future, will it debut plug-in capability with Saab, or give the limelight to another division?

Refresh your memory on the 9-3 BioPower Hybrid here.

[Sources: Aftonbladet, TrollhattenSaab.net and Saab]

(Top Tip, Swade!)