Berkshire's lithium venture may supply U.S. automakers, including Tesla - FT

(Reuters) - Warren Buffett's Berkshire Hathaway Inc has signed an agreement to allow extraction of lithium from its geothermal wells in California, a project that could offer U.S. carmakers and battery producers a secure supply of the metal, the Financial Times reported on Sunday.The venture has been in talks to supply Tesla Inc with lithium, a component for batteries to power electric cars, the newspaper reported, citing people familiar with the company.Berkshire Hathaway's geothermal wells..