I think AiG might mean energy density.
The battery pack for a 100 mile range in a car, say, is a lot bigger and heavier than a 2-3 gallon fuel tank. And the battery pack on my bike (range about 25 miles) is half the size of the fuel tank on my old Honda C50, which did about 170 miles on a fill.
Ah OK. That's fair enough. As we have said, battery tech at the moment is still in its infancy. I have no doubt that it will improve significantly. For example the battery in an ID4 is about 630kg. With the new superdense CATL batteries the same 83kw battery would weigh about 170kg. So within a few years we could be looking at longer ranges and much lighter batteries. Which presumably also means the batteries are smaller and easier to swap out / maintain.