We know that electric motors are very powerful(hp and torque) and efficient than all the combustion engines. There are lots of advantages of electric motors to be used to propel vehicles as you can have the same maximum torque at any speed, very high pickup, high top speed as well as no need of transmissions . But when we consider electric cars, the biggest problem come up with the battery over the longer hourly time it takes to charge. So the best thing is the hybrid cars,( electric cars with range extenders.) Most hybrid cars manufactured today use a combination of the electric motor and combustion engine to power the wheels. There I think , encounters disadvantages as the combustion engine limits the performances of the electric motor. I think according to my knowledge, the best hybrids are the vehicles that are fully electrically powered with an engine or a fuel cell to generate electricity to charge the battery. But lots of car manufactures don't do that instead they use the traditional combination of fuel engine and electric motors. I need to figure out why they don't do so, because according to my knowledge, what I've speak of should be the best hybrid type in performance as well as efficiency. Can some one please explain!!!.