If you upgraded your iPhone to iOS 11.3, which rolled out over the past week or so, look at the Battery section of Settings, under a new menu called Battery Health. That’s where you’ll find crucial information about the health and longevity of your phone. It also gives you the ability to prevent your phone from being slowed down due to poor battery health.
The new feature, still in the potentially buggy beta stage, appears months after Apple Inc. came under fire for slowing down (aka throttling) older iPhones without disclosing...