If this was directed at me-
A replacement Energy Source (to replace the deemed evil fossil fuel energy source). A battery is only 1 component of the electrical energy source that the US has defacto decided is the replacement. And a battery is a storage device, not an energy source by itself. Like a fossil fuel storage tank.
Minutia discussions like this about components and technology within the discussed energy source and how it can be implemented in the real world, are exactly the kinds of discussions and solutions that are still being made with the use of fossil fueled energy 53 years later.
I'm on an EV forum, and am always pointing out how much batteries suck. As you said, they are equivalent to a fuel tank. The only difference is the battery fuel tank costs $10,000, weighs 1,000 pounds, holds 10% of the energy, gobbles a lot of space, takes an eternity to fill, degrades with use and time, requires environmental regulation (heating/cooling), and in rare cases spontaneously combusts (usually while charging).
That's a lot of limitations to overcome.
There are benefits, like being 1/4 the cost per mile of gasoline, starting off "full" every day, not visiting gas stations, lower maintenance costs...
With a $7,500 to $10,000 subsidy (in certain states), EVs have managed to claim 3% of auto sales. That means they need to become $7,500 more valuable to people once subsidies are dropped just to maintain the 3% sales volume. That's a lot of ground to make up.
I'm saying all this as an EV enthusiast (and realist). I haven't owned an EV, but I had a Prius plug-in which was fantastic (and gutless).