Tesla Motors Inc. is working exclusively with Panasonic Corp. for its Model 3 electric car battery cells, Chief Executive Elon Musk said, adding that news stories reporting otherwise were “incorrect.”Musk made the statement in a tweet Tuesday night. He also said the cells for the higher-end Model S sedan and Model X SUV were by Panasonic too.Reuters reported Tuesday that Tesla probably would add Samsung SDI as a supplier for the Model 3 if Tesla’s battery plant could not meet demand.Reuters said a Tesla spokeswoman had responded to its inquires Tuesday by saying the company works with “all leading battery manufacturers around the world” but doesn’t comment on details of the programs with specific suppliers. Musk indicated that Samsung could be involved with Tesla Energy, which is focused on ​batteries designed to store energy for homes, businesses and utility companies.

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