Apple was still selling the iPhone 11 new then. They discontinue the Pro's as soon as the next one comes along though.

I'm assuming because it's an older phone. Apple's manufacturer warranty covers the battery if it hits 80% within a year or during AC+ coverage. If you bought it elsewhere, two years ago...yeah, golly, Apple is so unfair.

Where and when did you get the 11 Pro from? Apple stopped selling them new with the release of the 12 Pro’s, over two years ago, and their refurbs come with a brand new battery. If you bought a used phone how would that be Apple’s responsibility? Alternately it was a brand new 11 Pro, and it could be over three years old. Batteries are consumables. Get it replaced if it needs to be.

Generally from an aging battery.

However, it can also be from a seemingly still decent battery in an area with extremely marginal reception.

Source: me out in the boonies

Was one of the elementary kids. We were West Coast though, so we didn't have it on live, I think we were planning to watch the first broadcast from the shuttle they had set up. A handful of us stayed inside for recess, our teacher was turning on the TV to see what was going on. That's when we found out.

Fast forward a decade and half, and I watched the pieces of Columbia falling through the sky from a breakroom at work. Drove home in a daze listening to the news.