A hybrid is a combination of a IC engine, a battery and a motor. The idea is to run from the batteries whilst the car is at low speed, then when a high enough speed is attained, the car will switch over to the IC engine. Any spare capacity from the IC engine is used to charge up the battery. When the car slows down, regenerative braking is employed and this charges up the battery, thus increasing the efficiency of the vehicle. Hybrid vehicles do not require an electricity to supply to charge the battery, the battery can be charged while the car is running and this is therefore a huge advantage over totally electric vehicles.
Cars are Expensive .