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At an event in Los Angeles last year, we showcased battery swap technology to demonstrate that it's possible to replace a Model S battery in less time than it takes to fill a gas tank. This technology allows Model S owners in need of a battery charge the choice of either fast or free. The free long distance travel option is already well covered by our growing Supercharger network, which is now at 312 stations with more than 1,748 Superchargers worldwide. They allow Model S drivers to charge at 400 miles per hour. Now we're starting exploratory work on the fast option.