A friend of mine is a power user and wants to move to an iPhone. He uses his phone all day for work, as well as in his off time. Battery life is #1 above all else. Which setup would provide the most battery life out of these? iPhone 7/8 with the Apple battery case iPhone 7+/8+ I’d assume a 7/8 with the official Apple battery case would beat a plus phone with no battery case, but I haven’t ever had one to know for sure. There are aftermarket battery cases for the plus, but not official apple ones.