Like a car wash you pull up, a clanker comes up from the floor and removes your batteries. They go into inventory to charge and can be cell by cell inspected and charged batteries are installed. 10 minutes TOPS.

This is already being done in China.

Your battery take won't come to fruition any time soon in the consumer market. Commercial trucking and such I can see, but consumers value interior space and standardizing a battery limits what you can do with the interior. Automakers would never pigeonhole themselves like that. Look at the cellphone and laptop market and their batteries.