DRIVERS OF GASOLINE-POWERED cars have it easy. Gas stations are everywhere. Fill-ups take just a few minutes. Drivers of electric vehicles, not so much. Public charging stations are far from ubiquitous, and boosting a battery means spending at least half an hour plugged in. So anything that makes an EV easier to use and own helps, and a newly announced goodie aims to make topping off a depleted battery easier than ever.