How many gazillions of dollars is it going to cost Boeing to install a different type of battery?
You would think that as long as it took to get this jet into service they would have seen the Li-Ion battery problem pop up once or twice.
actually the planes all entered service at the same time.
so there was no extended shakedown period for a few planes.
if they had flow a couple of them instensely before putting the entire fleet into operation they would have cought this during the shakedown phase.