I run iOS 18 and have no problems with my battery, it is at 73%. iPhone 14 Pro. Don't think I'm going to install 27 either.
I reviewed the battery test results for iOS versions 26 (26.2, 26.3, 26.4, 26.6) and 27. The comparison covered the iPhone 14 series and newer models. The batteries in each model retain their charge 10–15% less effectively on iOS 27.
I reviewed the battery test results for iOS versions 26 (26.2, 26.3, 26.4, 26.6) and 27. The comparison covered the iPhone 14 series and newer models. The batteries in each model retain their charge 10–15% less effectively on iOS 27.