Why don't all electric cars have the same sized battery or couple types.
You drive to a garage and swap for a charged one and pay cost of electricity
No delays waiting for charging.
Remember the old calor gas bottle systems
Told @elonmusk my idea but he never replies
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@MLBjustme As an EV owner, I would rather spend a few minutes at a DC fast charger than have people I don't know remove and replace my battery. That might work for fleet vehicles with company shops though. Like UPS/FedEx trucks.