Which iOS update do you remember that did you see an issue with that?Nope, I bought this base iPhone directly from Apple website last year feb. I kinda feel the battery health info maybe false. I do restart, reset the iPhone still show the same. Actually I never check the battery health info ever since I own the base iPhone 15. Just only few months back I go check the first time since everyone so concern about the battery health after install the latest IOS claim draining the battery fast etc. I was shock huh 71 percent?? and my cycle only 280+