Not really, consider the extreme of a car shaped object with a volume of 99.9% battery, something of that shape can only go a certain distance X, where X is big

Not really, consider the extreme of a car shaped object with a volume of 99.9% battery, something of that shape can only go a certain distance X, where X is big, but moving a car shaped object X+1 is not possible with current (oh the pun) battery technology. One way to travel X+Y would be to put it on a flatbed electric tow truck with loaded range of Y, correct? In that case the tow truck is the first stage and the car is the second. I am serious about the self driving 4 wheeled trailer full of batteries. Given the irrational claim that an electric car is useless to (all) Americans unless it can drive over 1000 miles per day, the best way to fight that irrational claim is to provide an equally irrational solution. So the proper way to fight an irrational thought experiment of needing to drive over existing electric car range, is provide the irrational solution of something like "mid-air refueling" but mid-highway instead of mid-air and electrical power instead of Jet-A. I've toyed with the idea of patenting it and publicizing it to make a political statement, but I generate good ideas a lot faster than I implement them, so .... No need to own the self driving battery trailer, just pop up a smartphone app and your GPS talks to the closest charger's GPS and nature takes its course. With advanced enough communications it can drive in formation with a semi-autonomous car, tailgating is perfectly safe at 85 if your reflexes are faster than a couple nanoseconds and the existing wireless charging systems means the charger trailer doesn't need to actually touch your car. Its amusing to think of a charge cart like this rolling around a parking lot as a public service to attract shoppers. No need to pull ultra high current charge cables to every lamp post or embed chargers in asphalt.