> Manufacturing of both cars and batteries. That's vertical integration.
Tesla is building their own battery packs, but they're still buying the cells from Panasonic, just like everyone else (Apple included) has the option to do.
And their first gigafactory in Nevada as far as I know has been producing cells for years. I suspect they stopped buying cells from Panasonic years ago.
Actually, the Gigafactories are operated by Panasonic on behalf of Tesla. Technically the cell production in the Gigafactory is done by Panasonic and the packs then assembled by Tesla.
Tesla is building their own battery packs, but they're still buying the cells from Panasonic, just like everyone else (Apple included) has the option to do.