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I had wondered what neat trick Tesla was going to use to cool those chonker 4680 cells. There is a reason you can't buy rechargeable C or D size batteries even though there are hundreds of options for AA and AAA batteries. Electrolyte is a pretty crappy thermal conductor.

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You can buy those though. They may be harder to find in physical retailers, but there are plenty of options out there.

My experience with those is that they are a AA cell in a plastic shell.

> My experience with those is that they are a AA cell in a plastic shell.

Several years back (2016) I had some EBL NiMH C-size cells that were obviously not AAs in a plastic shell. They were significantly heavier than a AA cell (around the weight of a C-size alkaline) and had a higher MaH rating.

Here's the current product listing: https://www.amazon.com/gp/product/B00FHVM7GC/

as others have mentioned, C & D cells in rechargeable format always have been a AA or similar sized cells. Even back in the nicad days this was true.

My 4x4 RadioShack remote control car from 1989 would beg to differ.

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