Why do you think there is any problem with battery endurance? I’m quite sure Amazon has run the numbers on battery life for individual flights and for the lifet

Why do you think there is any problem with battery endurance? I’m quite sure Amazon has run the numbers on battery life for individual flights and for the lifetime of battery packs many many times. It’s just economics. And has basically nothing to do with safety. Unless a battery fails suddenly and spectacularly, which is rare and probably isn’t what caused it to crash into a crane.