Elon Musk teased his fans on Friday with a tweet — hinting at the things Tesla has in store for Battery Day, on September 22.

Speculation is driving the auto industry wild.

"Many exciting things will be unveiled on Battery Day 9/22," wrote Elon Musk in a Friday tweet.

Tesla's Battery Day and Shareholders Meeting have so far been pushed back several times, reports Electrek.

Battery Day was initially delayed for unexplained reasons, and later both events were delayed simultaneously due to issues surrounding the COVID-19 crisis as Tesla combined the events into one, with limited and in-person attendance.

In August, Tesla declared it would hold its Shareholders Meeting virtually, with Battery Day going forward mostly via virtual means, with some limited in-person attendance of randomly-selected people.

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