Infinit battery is utopia:)

Even when superconductor is built in, it's still the chemistry that defines the speed. Don't confuse it with supercapacitor.

Also, the wires.. at first it needs to be known if the superconductor is wire-able. If it can't be formed to a wire. Then no use as a wire.

But where ever a strong magnetic field is needed, there the superconductor will be found in use