"I have to be honest. The iPhone 14 Pro Max battery sucks. With iPhone 13 Pro Max, I could use my phone all day and it still had some battery left for the next day. iPhone 14 Pro Max, on the other hand, requires me to recharge my phone at least twice a day. The biggest proof of this is that Apple itself promotes iPhone 14 Plus – and not the 14 Pro Max – as the iPhone with the longest battery life."
"iPhone 14 Pro Max has about the same battery capacity as the 13 Pro Max (4352mAh vs. 4323mAh). However, iPhone 14 Pro Max is the first to have an Always-on Display, and that means it drains more battery than its predecessor. Sure, I could turn that feature off, but what’s the point of buying a new phone and turning off one of its key new features?"
"I also believe that part of this is due to poor software optimization (iOS 16 wasn’t a good release) and the A16 Bionic chip not bringing great improvements compared to the A15."