Regenerative braking is the recovery of kinetic energy during braking. In a conventional vehicle, a majority of the kinetic energy is converted during friction braking into heat and emitted unused into the environment. Hybrid and electric vehicles can use the electric motor to recuperate at least a portion of the kinetic energy for reuse. Regenerative braking enables an extended range in electric vehicles as well as lowering fuel consumption and improving CO2 balance in hybrid vehicles.