Apple batteries last much longer than a year. My first iPhone was 3G model and after changing hands three times and three and a half years later it still goes s

Apple batteries last much longer than a year. My first iPhone was 3G model and after changing hands three times and three and a half years later it still goes strong. Also you are never tied to the outlet with iPhone — battery easily lasts a day even under heavily usage, so you can just plug it in for the night. And for most people convenience is not to have to carry spare batteries. I never so a person who did that — it is extremely rare preference. Apple is done with replaceable batteries, expect others go the same way.