Iphone 15 Pro Max Battery Drain

Have you updated it not long ago? Please wait a few days as your iPhone is still busy with indexing in the background.

If not, you might want to force restart it to see if the issues persist

1. Press and quickly release the volume up button.
2. Press and quickly release the volume down button.
3. Press and hold the side button.
4. When the Apple logo appears, release the side button.