Miserable battery life after installing a new iOS update is normal, and iOS 12.4 is likely not to be any different. Installing updates seems to throw off the battery calibration, as well as putting the additional workload on the battery. Apple released iOS 11.3, the latest version of its mobile operating system today, March 29. The update includes new privacy settings, new Animoji, updates to its augmented-reality engine, and other general updates. It also includes a new setting called Battery Health, which lets iPhone owners decide
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