Yes it is a Series Hybrid.
Check out the 09/05 Motor Trend on line article on how the EPA is busting their chops about it.
But you have to ask yourself, do you think they would bet the farm on this technology and the egg they would get on their face not to mention be out 500 million, if they didn't think they had a shot at fixing the thermal issues of Litium-Ion Batteries?
Just thinking out of the box here.....
Hope so. But this is the same company that gave us the 4-6-8 Cadillac engine in 80-81 and the “all aluminum diesel” pickup motor that had just about 12 ounces of stump pulling torque.