With something that has one quarter the energy density but four or more times the power density, the right place to put it commercially might be between the cha

With something that has one quarter the energy density but four or more times the power density, the right place to put it commercially might be between the charging station and the batteries rather than the batteries and the motor. Replace 25% of the batteries with this, charge it in a fraction of the time of the full battery pack, then have it charge the batteries while you're driving down the road. I don't need 5500 horsepower. 390 miles on a really short recharge cycle makes a lot of sense. If one could do both, that might be nice. But cutting charging time while maintaining most of the range makes more sense than having acceleration bursts to the wheels that never make it to the road.