That's being a bit pathetic, the sentence says "almost free electricity". Obviously the meaning being that the engine is running anyway and driving the front wheels, any surplus power can put charge back into the battery to be used later when required at lower speeds. In the 18 months that I...
You will get better results if you don't let your battery go flat, when you are on faster roads and going over about 45 mph on a light throttle the car will go into parallel mode. If you now press the charge button it will put charge back into the battery (try and keep the battery between 1/3rd...