"extra kilometres for free, thats right, free, cause travel on battery is free. and as we all know, strting off, and getting up to speed in a petrol car is where all the fuel is burned. de-accelerating is also free, cause its on battery. driving in traffic is free etc etc etc. so imagine if i added those features to your existing car, it means free driving without petrol"
Sorry - nothing is free - you need energy to make the power, that comes from petrol in the case of this car.
+1 . Sorry Brett but you can't cheat the laws of Physics.
