It seems that these batteries solve the problem they are supposed to cause (Taking too much power). If you can put these in a charger then they can pull whateve

It seems that these batteries solve the problem they are supposed to cause (Taking too much power). If you can put these in a charger then they can pull whatever power they need from the grid over a long time, then dump all their charge into an electric car in no time when the car shows up. I can imagine some huge batteries sitting in a 250 MW "Filling" station that are slowly being filled from a grid power line at a couple megawatts.