I have found a 40900 cell on Taobao: https://item.taobao.com/item.htm?spm=a1z10.3-c-s.w4002-21513148700.70.667c7b3dkSz6t0&id=593991411207
It is pretty inefficient, though, with only 5.5Ah. But it has only 2 milliohms internal resistance. Seems to be made for car starters.
Interesting. This is a huge news if true. Fortunately we’re likely to learn whether it is in just a week. So I’m waiting patiently.
Similar sized batteries in LifePO4 chemistry that where available over a year ago.
I mentioned them here.
Its a 5498 cell, 10x the energy of a 21700. Floats in antifreeze to warm and cool cell.
One of these cells in the blf-lt1 would give a 2 month runtime.
https://www.youtube.com./watch?time_continue=5&v=QQY2vYhysBY&feature=emb_logo
The difference is that:
They have 10x a 21700 energy. Tesla will use battery pack 1/10th the current size. How is that terrible density? Not understanding ?
It has a catalyst electrode and drops into a pack. Levels of magnitude better then 21700. New teslas built with this 5498 cell will cost msrp 29k and have 300+ mile range.
I will buy one and charge with my solar array and drive for free.
If it’s 54 mm diameter, a host will need a handle to be comfortable. 
I was replying to an earlier post.
I already added a quotation to make it clear to others.
You must have small hands. I was hoping for a headlamp. :partying_face:
It seems that the number 54 comes from “FX054” marking on the can, that sounds like a very wild guess if you ask me, granted it looks bigger than 40700 unless those are small hands.
The bad news is now what will happen to the 21700?
That comes from the twitter guy cited in the video, unless I missed something else (video is such an annoying format, just write an article).
And there are rumours the new batteries will be LFP.
I hope they make packs available to solar off grid users. It would be awesome to have a 100kw pack.
Seriously exciting! But if it is manufactured in-house by Tesla, will it ever be sold in the after market?
Maybe no…but it starts the same as 21700. These cells were intended to be used by Tesla in their vehicles period.
Then they landed nearly everywhere…
[quote=idahofarmer]
They have 10x a 21700 energy. Tesla will use battery pack 1/10th the current size. How is that terrible density? [/Quote]
I don’t think the pack is going to be 1/10 the volume. There will likely be some packing efficiency improvements with the larger cell, but overall volume should remain similar. A 10x reduction in volume would require other worldly improvements in active material specific energy.
The point for them is $$ first. Fewer cells in an architecture with shared components will save time and money in production. I’m not qualified to even guess how much that may be, but I can say pretty confidently the energy density of the cell is not 10x current values.
I guess by “size” he meant “cell count” rather than “volume”.
I guess we will know possibly next week, here is another video posted just 16 hours ago. Talk about massive runtime capabilities in a flashlight! This would be a game changer in the flashlight world!
https://www.youtube.com./watch?v=jK_soSRgMkM
