Musk announced a new 100-kilowatt-hour battery upgrade for the Model S and Model X cars that have Ludicrous modes in August.
The new battery option extends the range of the Model S to 315 miles per charge, making it the first electric car on the market to exceed 300 miles of range. The new battery option also extends the range of the Model X with Ludicrous mode to 289 miles.
The upgrade also enables the Model S P100D Ludicrous to accelerate from 0 to 60 mph in just 2.5 seconds, making it the world's third-fastest production car. The larger battery pack also makes the Model X the world's quickest SUV with the ability to accelerate to 60 mph in 2.9 seconds.
But the upgrade isn't cheap — those who already own the car can upgrade for $20,000. If you don't own it yet, it will tack an extra $10,000 on the price.