Mild and Strong Hybrids - The mild and strong hybrids add an electric boost or drive motor to the package. Since electric motors are generally able to produce electricity when they are driven mechanically, this also allows for regenerative braking. In these hybrids, lifting off the accelerator and coasting causes the wheels to turn the motor to produce electricity and recharge the battery. While this is happening it increases drag and the vehicle slows, just like it does under engine braking in a conventional vehicle. The battery powers the electric motor during acceleration or cruising. This cuts the workload on the gasoline engine and reduces its fuel consumption. In a mild hybrid, the motor typically has an output of 15 kilowatts or less, which is enough to provide boost and start-stop capability, but not enough to drive the vehicle on electricity alone. Strong hybrids typically have motor/generators with 30 kW or more, which allows them to be driven on electricity alone for short distances (1-2 miles) at speeds under 65 miles per hour.