What we really need is a standardisation to cover for the improvements in the background. Kind of like a USB interface for batteries. Imagine, you could buy a

What we really need is a standardisation to cover for the improvements in the background. Kind of like a USB interface for batteries. Imagine, you could buy a car, that has slots for you to attach standard batteries. You could leave the batteries charging at home, office, shops that lease you charged batteries(like gas stations) etc. It would also take care of "I live in an apartment and park my car by the side of the road, so no home charging.. problem". Also, gets rid of the range anxiety if you know you could get batteries everywhere or at-least charge yours everywhere. Now, when technology genuinely improves by a magnitude, replace the cells, but keep the interface for a decade or so. Bonus if that standard catches on for other uses. Imagine same batteries being used for power tools at home, emergency power supply at home, camping stuff, plug those boxes into the edges of solar panels while they are not in the car etc. Leave it to the competing business that are "battery suppliers" to figure out how to make them more efficient, cheaper, and do further R&D. Car companies can stay at making cars that are essentially safe, aerodynamic shells with electric motors waiting to be powered up by customer supplied batteries.