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iOS 15.4.1 Is Here and Has an iPhone Battery Drain Fix

The update also fixes a security flaw some devices might have.

Apple iOS 15
Apple released iOS 15.4.1 on March 31.
James Martin/CNET

A new iPhone update arrived recently: iOS 15.4.1. Coming on the heels of iOS 15.4, this update is relatively small but still important: It resolves a battery-draining bug and fixes a security flaw that Apple says "may have been actively exploited" on some devices.

Read more: iOS 16 Wish List: New iPhone Features We Hope Apple Debuts at WWDC

Some iPhone users took to Twitter to complain about battery drain after installing iOS 15.4. Apple Support responded to these customers by tweeting that it's normal for some apps and features to adjust for "up to 48 hours after an update."

The update also fixes a bug that causes braille devices to become unresponsive when navigating text or showing an alert, as well as a bug that causes some iPhone hearing devices to lose connection in some third-party apps.

Apple's iOS 15.4 was released on March 15, and the update included the ability to unlock your iPhone using Face ID while wearing a mask, Universal Control, 37 new emoji and other features.

For more Apple news, check out every new feature on iOS 15.4, CNET's Apple Studio Display review and why an iPhone subscription could be a great idea.

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