Enhanced auto-pilot features may be released to "beta" customers by late June, Tesla Motors Inc. Chief Executive Elon Musk said Tuesday at the electric-car maker's annual shareholder meeting. Musk said he is personally testing the latest version "every week" and making steady progress in the driver-assistance feature. Musk also announced that the Powerwall, Tesla's stationary battery for homes and small-scale commercial applications, will more than double its power capacity to 7 kwh, with the price unchanged at $3,500. The Model X, Tesla's upcoming SUV, will be ready to be sold in three to four months, Musk said. Shares of Tesla declined 0.4% in after-hours trading after ending the regular session down 0.1%.
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