Attention Tesla drivers: now you can swap your battery in California by Ben Geier @FortuneMagazine 11:47 AM EST E-mail Tweet Facebook Google Plus Linkedin Share icons If you’re driving from Los Angeles to San Francisco in a Tesla, you can now deal with a drained battery faster than it would take you to fill up the gas tank of a traditional car. Tesla CEO Elon Musk announced today on Twitter that the much-anticiapted “battery swap stations” were now operating in beta: Pack swap now operating in limited beta mode for SF to LA route. Can swap battery faster than visiting a gas station. Tesla blog out soon. — Elon Musk (@elonmusk) December 19, 2014 So how exactly does this work? According a video produced by Tesla TSLA , a battery pack swap area will be at Tesla’s stations found between Los Angeles and San Francisco. A person who pulls in can either use the supercharger to recharge the battery in their car — which is free — or pay to have their battery swapped out, which will cost money but be faster. Telsa hasn’t announced a price for the battery swap feature. “The only decision you need to make when you come to one of our Tesla stations is do you prefer faster or free?” Musk said. The battery replacement is done by machines similar to the ones used in the Tesla factory. On average, Telsa’s batteries last for about 350 miles per charge, if a car was traveling at 55 miles per hour. The driving distance between Los Angeles and San Francisco is a little over 380 miles — so a Tesla driver would need to recharge at least once on the journey. It hasn’t been announced yet how many stations in California will have battery swap machines, or when the program could be expanded.