[riba2233]

They are available for at least half a year now:

https://eu.nkon.nl/rechargeable/other/sanyo-ncr20700b-lithium-battery.html

 

[riba2233]

Panasonic bought Sanyo, and Panasonic makes cells for tesla, so they are based on the same chemistry and probably have similar life expectation.

 

[riba2233]

Really? Didn't tesla open their patents? Also, what you are saying could be true for these new cells, but in past they've used regular panasonic 18650be cells and they are available to anyone.

 

[riba2233]

Internal resistance is closer to 40-42 mohm, but yeah, still a lot heat at max power levels. That's why it can only be used as burst power, their efficiency drops to around 65%.