> So now we're only 3x-4x of a direct replacement.
The math leads out an important factor. As the liquid fuel burns, the airplane gets lighter. A lot lighter. Less weight => more range. More like 6x-8x.
Batteries don't get lighter when they discharge.
Not to mention that jet planes routinely take off heavier than their max safe landing weight today too, relying on the weight reduction of consuming the fuel to return the plane to a safe landing weight again while enjoying the extra range afforded. This trick doesn't work well with batteries either.
There isn't any battery technology on the horizon that would lead to practical airliners.