Plug-in hybrid vehicles have a battery and a combustion engine. Like pure-electric vehicles they can be charged from a normal socket or a rapid or fast charger.
They have a smaller battery engine, than a pure electric vehicle, which will drive the wheels at low speeds or for a limited range.
When the battery has been used, the car continues to function using the combustion engine. So they offer an increased range of more than 300 miles.
The electric motor and battery help these vehicles to use less fuel and produce less pollution than conventional cars, even when in hybrid mode.
But as they also use conventional fuel they do have higher emission levels than a pure electric or extended range vehicle.