Regarding the number of batterie that have been changed-out.-
First, one has to go along with the officoal viewpoint at Certification....."safe, well-proven, long service-life......."
So, What we're looking at, is an overgrown cellphone or Laptop battery.
they cost a fraction of (16,0000 USD?) the price of the Thales "box of energy" They're charged by non-technical and sometimes low-intelligence owners ,using cheap and nasty power-supplies.
IT ALL WORKS MILLIONS OF TIMES BETTER THAN THE "SCREAMLINER" SETUP
The number of documented failures have been a minute percentage of the Thales failures.
All these "Domestic" batteries are properly fed/controlled by their interface circuitry.
When your phone needs charging, it switches itself off....you connect a supply and it automatically "sees" it and commences recharging....does this for hundreds of cycles.
So, WHY is the "screamliner's" system so pi55-poor that it won't stop an over-discharge but instead converts it to a disposable?
The lack of sub-cell monitoring and the whole lack of fitness for purpose makes one think of short term profiteering.
For whatever reason, Boeing plumped for the most sensitive and unstable of the Lithium technologies.
You would have thought that the person(s) making that decision, would have used every resource available to ensure that it worked properly.
they didn't ......it doesn't. someone has a lot to answer for. that many "dead" batteries in that short an operating-life points to a major problem......so, who was brushing it under the carpet?
If the volume of components ordered is twice the number that the customer can use (new-builds) the balance is going somewhere.....in this instance, a massive pile of replacements well before their anticipated service-life.
I feel there's a lot we don't know, as yet.