Apple admits iOS 15.4 battery drain is an issue but there is a solution

Apple released iOS 15.4 on March 15 after months of waiting. Battery drain problems are common with new iOS updates, but Apple never explained why. The Apple Support account on Twitter responded to a user complaining about the iOS 15.4 battery drain problem. Why new software causes battery drain problems If you can recall when you set up your iPhone for the first time, the battery life would most likely have been worse than what you got, say, a week later. But if you find the iOS 15.4 battery drain issue persists after a few days, Apple has advised restarting the iPhone.