Tesla Model S reveal

Tesla CEO Elon Musk hinted via tweet Sunday at a breakthrough that would eliminate electric car drivers' greatest fear.

The Model S is already fantastic in terms of range compared to its electric competitors. Each of the four variations delivers ranges between 208 and 270 miles per charge, compared to competitors' 100 miles per charge.

Still, the news was well-received by investors - Tesla stock shot up 3.72% Monday.

But Elon Musk has been criticized in the past for failing to deliver on exactly these kinds of "teaser tweets." Here's how the moonshot entrepreneur did today...