Even if it was for batteries, unless we get fusion factors down to something that can fit in a car, power drill, smartphone, etc. batteries are still going to be a big part of the equation.
Sure, you can generate enough juice to power whatever you want, but only as long as it’s plugged in, anything that needs to get detached from the grid is still going to need batteries, and you probably don’t want your car hooked up to a 10 mile long power cord for your commute.