B&O noise cancelling headphones have easily accessible replaceable batteries, so there’s no fear of battery failure (I have a spare that I’ve never had to use). Useful, if you’re on a long-haul flight, to carry a spare battery.

Prior to buying my B&O H8’s, I auditioned the Bose (and B&W): to my ears, B&O is considerably superior to Bose (and B&W).