A lot of deals still get done with handshakes and words, but companies (and mayors) really need to start putting stuff in writing before they announce it. These last few weeks have seen huge news from Hertz, who said it had a deal with Tesla for 100,000 cars, with an option for more, before CEO Elon Musk noted that nothing was finished in the deal.

Today Frank Scarpitti, the mayor of Markham, Ontario, said that the EV company plans to open a factory to produce its new 4680 battery cells. Reuters reports that this is related to Tesla's purchase of Canadian company Hibar, which produces pumps used in battery assembly.

"I'm delighted to share that Tesla Canada is joining our already robust automotive and technology ecosystem by locating a manufacturing facility in the City of Markham," the mayor of the city near Toronto said on Twitter.

"The facility will be the first branded Tesla Canada manufacturing facility in Canada and will produce state-of-the-art manufacturing equipment to be used at the Gigafactories located around the world in the production of batteries," he concluded.

Hibar was named at last year's Tesla Battery Day event by senior vice president Andrew Baglino, who cautioned that "this is a new architecture and unknown unknowns may still exist." That was the same event where we first saw the Model S Plaid.

The 4,680 cells are said to be both cheaper and easier to manufacture, not to mention more powerful. One of the keys is the tabless makeup, which is the point where batteries connect. They need to be attached after production, which slows things down. They're also another weak point in the overall design.

Tesla will join Multimatic in the town of Markham, about four hours from Detroit. Mulitimatic works on many of the carbon fiber monocoque supercars you've heard of, most notably the Ford GT. We'll keep an eye on Musk's Twitter, considering that's now where deals get done, or undone.