REVIEW: Driving the Tesla Sport. “The Sport is perfectly suited to the high-speed exploration of winding back roads far from civilization. And that’s where you’ll come face to face with the inherent limitations of the Sport’s impressive technology: All batteries, even a beast like the 53-kilowatt-hour pack in the Sport, eventually go dead. And, unless you’re lunching at the Googleplex you’ll be hard-pressed to find somewhere to charge up. Therein lies the quandary of the Roadster Sport. It encourages you — no, it entices you — to explore that squiggly road on the GPS, and it’s so much fun to drive you won’t want to stop. But venture too far and you’ll inevitably think, Will I have the power to get home?”