Interesting for drive units, competitive with Molicel P42A, P45B
The tabless technology was patented by Tesla in 2020-05-14 (Publication)
Available now, the Ampace JP40 at a price of 5usd per cell (130 batch)
Tested and confirmed by Mooch:
“This is the best performing round cell I’ve tested for moderate to very high power applications”
Tabless advantages:
https://www.quora.com/What-are-Tesla-s-tabless-battery-cells
Well, datasheet says JP40 has 4mohm internal resistance.
Let’s assume we gain 3mohm less per cell comparing to p45b.
Let’s assume we only do starts and at 70A, using 12s2p 48v, that is 3360w.
We will gain then ((0.003/2) * 12 * 70 * 70)/3360=2.5%
improvement in capacity.
But p45b capacity is larger by 500/4000=12.5%.
All in all p45b better by at least 10% for our applications
The first (?) consumer version of a technology only five years old. Let’s hope that other brands will follow and push the capacities, as Molicel has done with its P4x and P5x.
In mooch’s testing the JP40 battery gets the highest rating of all for high current applications. I guess that’s because of the voltage staying higher and in the end providing more energy than even moli 50. You have to remember that the capacity ratings are normally taken at 0.2c so Ah values can’t be compared straight off.
Testing gives the best data 
