Tesla Model S reaches 400-mile range milestone

There's an electric car you can buy, right now, that has more than 400 miles of range — which is what you'd expect from an average gas car. 

On Monday, Tesla announced that the North American variant of its Tesla Model S Long Range Plus car has an official, EPA-rated range of 402 miles, making it the first widely available electric car with a range of more than 400 miles. 

According to Tesla, this is a nearly 20 percent increase in range compared to last year's Model S 100D which has a same battery pack design. So how did Tesla's engineers manage to push the range to 402 miles? Little by little.  Read more...