Relief at Last: iOS 15.4 Battery Drain Fixed by the New 15.4.1 Update
For the last few weeks since the release of iOS 15.4, many iPhone users have been grappling with a common and frustrating problem: severe, unprecedented battery drainage. Reports flooded social media of iPhones rapidly losing charge, sometimes dropping by as much as 50% in just a few hours. The good news is that, as of early April 2022, Apple has rolled out a crucial fix: iOS 15.4.1.
If you experienced unexpected battery issues after updating to 15.4, the new patch should stabilise your power consumption immediately. Here is a recap of why the drain occurred and how the issue has now been resolved.
📉 The Issue: Why Did iOS 15.4 Drain Batteries?
The iOS 15.4 update was highly anticipated, bringing key functionality like Face ID with a mask and the Universal Control feature for iPad and Mac. However, these major changes triggered intensive background activity that was intended to be temporary but, for many, became a persistent power drain.
- System Re-indexing: After any large software change, the iPhone must re-index all data (photos, apps, files) for Spotlight Search and system stability. This process is highly CPU-intensive and typically takes 48 hours to complete.
- New Feature Integration: Setting up features like Face ID with a mask required significant initial battery drain for calibration, which did not stop for some users.
Apple initially stated that the drain was temporary, but the issue's severity confirmed an underlying bug that prevented power usage from returning to normal levels for many users.
✅ The Resolution: Introducing iOS 15.4.1
Apple acted swiftly, releasing the iOS 15.4.1 patch on 31st March 2022. The release notes specifically called out fixes for battery drain issues, confirming the widespread nature of the bug. Users who install 15.4.1 should notice their battery performance returning to normal almost immediately. If you have not yet installed the update, go to Settings > General > Software Update now.
💡 The Long-Term Lesson: Battery Health Matters
While software bugs are temporary, this recent episode highlights the paramount importance of your phone’s physical battery health. When a bug causes intense CPU usage, a weaker battery degrades much faster than a healthy one.
Whether you are using a new device or considering an older model, always monitor your battery health via Settings > Battery > Battery Health. If your Maximum Capacity is below 85%, you may be vulnerable to performance issues during high-demand periods like intense system updates.
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