I'm sure Boeing does, but the FAA has doubts about those. They need more input. I'm sure Tesla has more batteries in the field for longer periods and probably h

I'm sure Boeing does, but the FAA has doubts about those. They need more input. I'm sure Tesla has more batteries in the field for longer periods and probably harsher vibration environments. This is engineering and safety, not finance. Dollars and the length of your list are not helpful metrics.