Tomorrow is Tesla’s Battery Day, in which it will likely unveil some battery advancements and in which CEO Elon Musk will likely make some grand claims. I’m gonna watch because Elon Musk is nothing if not entertaining but for comparison’s sake let’s have a look back on the last time Tesla did this.

That would be Autonomy Day, as April 22, 2019 . That day, Elon went up on a stage and !

Here’s one thing:

By the middle of [2020], we’ll have over a million Tesla cars on the road with full self-driving hardware, feature complete, at a reliability level that we would consider that no one needs to pay attention.

That would be Level 5 autonomy, which, hmm, I don’t think that’s happened yet.

Here’s another thing:

“From our standpoint, if you fast forward a year, maybe a year and three months, but next year for sure, we’ll have over a million robotaxis on the road,” Musk said, . “The fleet wakes up with an over the air update; that’s all it takes.”

Hmm, I don’t think that’s happened either!

Here’s one more thing:

“It’s financially insane to buy anything other than a Tesla.”

Hmm, this is still as untrue today as it was in April 2019, which is all to say when Elon goes on stage tomorrow it’s fair to take a lot of what he says with a grain of salt.

What’s he going to say, anyway?

Here’s :

On Tuesday, Mr. Musk could unveil a technology offering 50 percent more storage per pound at lower cost, according to analysts at the Swiss bank UBS.

And here’s :

Recent acquisitions, leaked photos, patent applications, and research published by Jeff Dahn, one of the pioneering developers of the lithium-ion battery and Tesla’s head of battery research, all point to Tesla making this big shift to in-house battery production.

Several photos of Tesla’s supposed in-house batteries recently surfaced on Electrek. The batteries, which are rumored to be from Tesla’s secretive “Roadrunner” project, appear to be twice the size of Panasonic’s 2170 cells. They also may be higher capacity while being lower cost for the company to produce by removing the tab, a part of the battery that forms a connection between the cell and what it is powering.

And here’s Elon himself:

I am excited to check in two years to see where Tesla is at with everything. I had almost forgotten about the Tesla Semi! That was unveiled , still not in production. The show starts tomorrow at 4:30 p.m. eastern.