However, it aspires to improve something we would bet is incredibly important to most people: battery life. This is because the release notes state that when you install this update, your iPhone or iPad will fix any battery issues that were apparently encountered with the release of iOS 15.4 a few weeks ago. Additionally, you get a fix for Braille devices that do not respond when text-navigating or displaying a notification, and a repair for Made for iPhone hearing aids that lose connectivity to some third-party applications. There may also be other, anonymous, bug fixes and various performance improvements, but clearly the title here refers to this battery drain repair. So if your iPhone or iPad seems to be very hungry after updating iOS or iPadOS 15.4, then you may want to go to Settings and install iOS 15.4.1 or iPadOS 15.4.1 as soon as possible. Source
