How on earth did it get certified then?
Certification process allowed certified individual cells in any configuration, at least until NTSB said
you got to be kidding.
Maybe time for Tesla to supply the batteries from the first of their new "GigaFactories".....
Perhaps Boeing will consider the newer battery chemistry Saft uses for their next endeavour.
It is not about factories, it is about battery test labs. Each automotive manufacturer invested close to $100 Million in battery test labs continuously adjusting chemical composition and testing with different charge/draw and other conditions.
I am not saying Yuasa don't have similar lab, but I doubt anyone tested batteries like Tesla for B787.
Of course I also buy 12v battery for solar system at Harbor Freight with 20%-25% coupon and put it in a empty bucket, just in case it leaks.