iPhone 15 Side Button
iPhone 15 Side Button

Are you wondering how to manage the screen timeout or completely turn off the screen on your iPhone 15? Managing screen behavior is essential for both privacy and battery conservation. Here’s a comprehensive guide to help you with that!

Understanding Auto-Lock Feature

Auto-Lock Mechanics

The Auto-Lock feature in the iPhone 15 manages screen timeout. This feature is designed to turn off your screen automatically after a set period of inactivity. You can customize this setting to your preference.

How to Adjust Auto-Lock

To adjust the Auto-Lock settings, go to Settings > Display & Brightness > Auto-Lock. Here, you can select the duration after which you want the screen to turn off automatically​​.

Dealing with Always-On Display

About Always-On Display

The iPhone 15 Pro models come with an Always-On Display feature. This means that your screen shows some information even when it’s idle.

Turning Off Always-On Display

To disable the Always-On Display, navigate to Settings > Display & Brightness and turn off the toggle next to ‘Always On Display’. This will ensure your screen turns off completely when the device is locked or left idle​​​​.

Completely Turning Off iPhone 15

Using Buttons to Power Off

If you need to turn off your iPhone 15 completely, press and hold any volume button and the side button simultaneously. Once the power-off slider appears, drag it to turn your device off. Then, wait about 30 seconds for your iPhone to shut down​​.

Alternate Method

Alternatively, press and quickly release the Volume Up button, then the Volume Down button. Following that, press and hold the Side button until the screen turns off completely. If the phone is functioning properly, you’ll see the power-off slider​​.

Maximizing Battery Life

Importance of Screen Management

Managing your screen’s behavior is vital for maximizing battery life. The longer your screen stays active, the more battery it consumes.

Balancing Convenience and Battery Usage

Find a balance between convenience and battery usage. Adjust the Auto-Lock settings to a duration that suits your usage patterns while conserving battery life.

Personalizing Your iPhone 15 Experience

Customizing Display Settings

Customize your display settings to enhance your iPhone experience. This includes adjusting brightness, text size, and wallpaper settings.

Using Display Features Wisely

Use features like Raise to Wake or Tap to Wake judiciously. These are convenient but can also contribute to unnecessary battery drain if used excessively.

Ensuring Security

Screen Timeout and Security

The screen timeout feature is not just about saving battery life; it’s also a security measure. A shorter timeout means your phone is less likely to be accessed by others when left unattended.

Recommended Security Practices

Set a reasonable screen timeout and ensure your phone is locked with a secure method like Face ID or a passcode.


Managing your iPhone 15’s screen behavior is key to both enhancing your user experience and conserving battery life. Whether adjusting the Auto-Lock feature, dealing with the Always-On Display, or completely powering off your device, these steps ensure you make the most out of your iPhone.


  1. Can I set different Auto-Lock durations for different situations? The Auto-Lock duration is a global setting and applies to all scenarios.
  2. Does turning off Always-On Display significantly save battery? Yes, disabling Always-On Display can help conserve battery life.
  3. Is it safe to frequently power off my iPhone 15? Yes, it is safe, but it’s generally not necessary unless troubleshooting.
  4. How does the Raise to Wake feature work? The Raise to Wake feature turns on your screen when you lift your iPhone, making it easier to view notifications.
  5. Can I customize what shows on the Always-On Display? Yes, you can choose to show your wallpaper or notifications on your lock screen.
Eric Chan

Hi! I’m Eric and I work on the knowledge base at GadgetMates.com.  You can see some of my writings about technology, cellphone repair, and computer repair here.

When I’m not writing about tech I’m playing with my dog or hanging out with my girlfriend.

Shoot me a message at ericchan@gadgetmates.com if you want to see a topic discussed or have a correction on something I’ve written.

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