9. Batteries
You get to pay more for batteries if you purchase the iPhone Xs and Xs Max, roughly as of December 31, 2018, a new battery will cost you $69 while all other models will be $49. Since the battery life is not better than the iPhone8, you are paying for the privilege of owning the newest iPhone.
For comparison’s sake, an iPhone 8 gets between 13 and 15 hours (depending on model). The iPhone Xs gets 12 to 13 hours of battery life.