This is why I buy iPhones. My mother has my old 2015 iPhone 6s. It runs latest iOS 15. Got a new battery at an apple store in under an hour mid last year. Look

This is why I buy iPhones. My mother has my old 2015 iPhone 6s. It runs latest iOS 15. Got a new battery at an apple store in under an hour mid last year. Looks like it just came out of the box. It’s over 6 years old now.