they had some similar to that on clearance at a mall i was at once. (i forget what store) they were marked down about 90% lol. I still didn't see the point.
"The battery provides the acceleration power, while the fuel cell provides cruise power as well as extra energy for the battery. This decreases the amount of batteries needed, eliminates the need to charge batteries, and provides much longer run times for the vehicle (factor of 3 to 4)."