FlightPathOBN:
Some FDR channels will need to be used to monitor cells (temp and voltage), charger electronics, load limiters, etc.
Batteries are becoming too complex to be used without integrated recorders.
Very difficult task to learn root cause. Perhaps impossible.
The best scenario would be trace it to a defective charger (hard failure like a defective component).
Highly improbable to learn something from the remains of the battery.
