My idea for swapping passenger car batteries worked like this. There is saying that 'Racing improves the breed'. Many car innovations started in racing like disc brakes and rear view mirrors.
I was thinking, What if Tesla had swappable battery stations? If a standard electric slide in battery standard was made, you could drive in, a robot pops out your dead battery and slides in a charged one. Each car would have 2 or 3 medium sized batteries under the floor.
Beats sitting around for an hour to get a normal battery charge.