There is a suggestion regarding EV batteries: It is that all EV makers, to agree at some unified standards regarding batteries. These are: ---------------- - Unified sizes & dimensions of batteries. - Unified sizes & dimensions of the space in the car bottom for batteries. - Unified way of fixing batteries in a car. - Unified way of connecting the cooling system to batteries. - Unified way of electric electronic connections to the battery. - Better so, a unified voltage, for battery output. The idea is like this: * 3 sets of "class-of-size" of batteries -meaning 3 sets of battery dimensions- might be produced, in order to fit small, medium & large sized cars .. something like: A , AA & AAA batteries, for household use. ** In Each "class-of-size" of battery type, batteries would be produced in a fixed width & fixed height, but with a variable length, within certain limits.. Meaning that: batteries of different lengths, would have different capacities, despite fixed width & height.. *** Mirroring the previous point: The battery space in car bottom, would follow the same rules: fixed width & height, but the length would be the maximal, for that "class-of-size" of battery type. Thus, we would find batteries of different capacities, for small, for medium, & for large sized cars. Meaning, the battery pool for all cars, would be of some 12, 15, 18 -or even more- different capacities.. But all would lie within the 3 sets of "class-of-size" of battery type. That will allow customers to replace the future batteries by their own, choosing the capacity & the brand, according to their preference & affordability .. something like replacing a tire (tyre). EV makers, then, would have more freedom to improve the other aspects of the vehicle, after being freed up of batteries headache. On the other hand, as a result of the mass production, the specialized battery manufacturers, would have better atmosphere for competition: for further product improvement, and price lowering." That means appearance of a new generation of Electric Cars : The "Compatible Batteries EV" generation. Or simply : the "CBEV" generation. And an electric vehicle of that generation, would be classified as: a CBEV.