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Of course they do. Specifically they went into a lot of details during last investor presentation.

• bmitc 6y ago
  They announced plans. That's different than has or have.
  • vl 6y ago
    If you want do be nitpicky about it, they announced specific cell designs, which means that they developed them, i.e. they have the “technology“.
  • marvin 6y ago
    Oh, come on. Yes, Panasonic carries part of the partnership when it comes to battery cells manufacturing. Tesla is still heavily involved in decisions regarding cell chemistry, and exclusively involved regarding battery pack design and manufacturing. Avoiding fires, charging quickl, ensuring battery longevity and making sure you get the most miles per kWh into the pack are largely battery pack issues. But then again, the longer this confusion lasts, the longer before it becomes obvious to everyone that Tesla has a significant in-house lead on this technology, so meh.