Apple has released iOS 15.4.1 and iPadOS 15.4.1 to fix the power drain fault that has plagued most of its users since they upgraded to iOS 15.4.
A representative from Apple Support tweeted to a client with battery problems that it was “common for your applications and features to need to adjust up to 48 hours following an update.”
Yes it’s draining fast after iOS #ios15.4 update #Apple
— J@Q (@jawadaq) March 19, 2022
Security fixes are also included in the release. Simply go to Settings, General, then Software Update on your iPhone to update it.