What do you all think about the following idea? A hybrid car could be built using a regular internal combustion engine, with a few small sterling engines connected to a battery resting on top of it. The car will start running on the internal combustion engine, and as it is running the heat from the engine will power the sterlings, which, through an electric motor (or generator) will charge the battery. When the battery is fully charged, the car will run on the battery's power. When the battery is depleted, the car will run on the internal combustion engine, and the battery will be recharged. Is this feasable?