Two years ago, when I first got my iPhone 6s, the battery lasted 2 days. After two years, it lasted about one day. I got a new battery last week and hoped it would last like when I first got the iPhone. Unfortunately, it also only lasts a day. Plus, nothing seems particularly faster (not that I saw that much slowdown previously) Is anyone seeing better battery longevity with the replacement? Still on iOS 10.3.3 here.