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What Chemistry are they using? Do we know for sure?

Delusional

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To me the two biggest questions always were....
1. How thick is the stainless? And that turned out to be a third less than expected.
2. What battery chemistry is it? I really don't have an answer to that. I know the range turned out to be about a third less than expected, but why?

On that battery day a couple years ago they definitely mentioned that they would be putting "high capacity" 4680 cells into the cybertruck, and that means a chemistry that includes cobalt.
But if they are using an iron chemistry, that would explain the shorter range.
Personally, i would prefer Iron because that means thousands of charge cycles, and much reduced fire risk. I suppose the dry anode would reduce fire risk. Ideally, you would order the chemistry of your choosing, with at least two choices.

Maybe this information is out there somewhere, but I have seen zero mentions of actual delivered battery chemistry. I don't even know for sure if they are using the dry-coat anodes and cathodes.

What is up with that?
My guess: They can do the dry anodes with the more stable Iron chemistry but are still having problems with higher capacity chemistries.
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Woodrick

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You will continue to see zero mentions of actual delivered battery chemistry because the battery chemistry isn't just something that you can see.

You should be able to just follow the 4680 discussions.
Batteries have been blamed for being the limiting factor right now. I'm sure that there are going to be some tweaks to them to optimize manufacturing.
 
 








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