What to expect from Tesla on ‘battery day’

Tesla plans to host its annual shareholder meeting, followed by a “battery technology day” presentation, on Tuesday, September 22.

Elon Musk’s electric car company is likely to disclose specifications for at least one new type of battery cell that the company has been developing, and may give an aspiring start-date for manufacturing its own cells at scale, too. As CNBC previously reported, Tesla has established a prototype manufacturing line for battery cells at their skunkworks lab in Fremont, California, near its U.S. car plant.

Since January 2017, the EV maker has mass…