The current battery
The current battery technology serves perfectly fine for any reasonable person who understands that there is always going to be a trade of between different class of products: i.e with ev's you only going to charge outside your house or office, only a handfull of time a year. Surely converting more public and condominium parking spots to ev charging ( even if only 2nd stage) would do more for ev adoption than improving range . As a condo dweller it does me no good to have an ev if I can not plug it overnight in my 70's build highrise. It's just to much hassle. I probably do 5000 kms a year or less of out of city travel and I could easily plan to stop every 300 kms for 30 minutes, but during my daily drive I do not want to go to a charging station 3 blocks from my apartment that serves 3 cars and find them more often then not occupied.This is the biggest issud with city dwellers and ev adoption.
Fix this issue in high density cities and ev adoption will explode.