Electrek is reporting that Elon Musk has said “it won’t be long before Model S has a 400-mile range.”

One of the biggest limitations of electric vehicles is range. While they are ideally suited for city and suburban travel, their range can often be a limitation for rural drivers or those wanting to take them on long road trips.

While the Model S currently has a maximum range of a 373 miles, battery technology is reaching the point where the company expects to cross the 400-mile threshold soon. Musk attributed the improvements to changes to the core chemistry in the vehicle’s batteries.

The end result, according to Musk, is “we’re rapidly approaching a 400-mile range for Model S, for example. So, it won’t be long before Model S has a 400-mile range.”

This is good news for Tesla customers, or those interested in making the jump to electric vehicles.