Even if you upgrade your phone every three years, say, someone else will use it after that. Sometime back, I sold a phone that was 5½ years old when I sold it.

Even if you upgrade your phone every three years, say, someone else will use it after that. Sometime back, I sold a phone that was 5½ years old when I sold it. If phones had better battery life out of the box, it will help their current owner and the next owner.