iPhone 15 Battery Drain: How to Fix iOS 17’s Overnight Issue

15 min readOct 15, 2023

If you have recently upgraded to an iPhone 15 or installed iOS 17 on your existing device, you might have noticed a significant drop in your battery life. Some users have reported that their iPhone 15 battery drains faster than usual, especially overnight when the phone is not in use. This can be frustrating and inconvenient, especially if you rely on your iPhone for work, entertainment, or communication.

Fortunately, there are some possible solutions to fix the iPhone 15 battery drain issue and extend your battery life. In this article, we will explain what causes iPhone 15 battery drain on iOS 17, how to check your battery usage and health, and how to fix iPhone 15 battery drain on iOS 17. We will also share some tips on how to prevent iPhone 15 battery drain on iOS 17 in the future.

What Causes iPhone 15 Battery Drain on iOS 17?
How to Check Your iPhone 15 Battery Usage and Health
How to Fix iPhone 15 Battery Drain on iOS 17
Turn Off Live Activities
Delete Lock Screen and Home Screen Widgets
Turn Off Live Voicemail
Update Your Apps and Software
Disable Background App Refresh
Adjust Your Screen Brightness and Auto-Lock
Use Low Power Mode
Turn Off Location Services
Disable Push Notifications
Fetch Email Less Frequently
Use Wi-Fi and Airplane Mode
Avoid Extreme Temperatures
Replace Your Battery If Needed
How to Avoid iPhone 15 Battery Drain on iOS 17 in the Future
Conclusion

What Causes iPhone 15 Battery Drain on iOS 17?

There are several possible reasons why your iPhone 15 battery drains faster on iOS 17 than before. Some of them are related to the new features and changes that Apple has introduced with iOS 17, while others are due to bugs or glitches that need to be fixed. Here are some of the most common causes of iPhone 15 battery drain on iOS 17:

Live Activities: Live Activities are a new feature that lets apps keep an ongoing notification on the Lock Screen or Dynamic Island, which is a small display area at the top of the screen. Live Activities can show you useful information such as weather, traffic, reminders, flight status, and more. However, they can also consume a lot of battery power, especially if you have many apps that use them or if you have an iPhone 15 Pro or Pro Max with an Always-On display.
Widgets: Widgets are another feature that has been improved in iOS 17. Widgets can now be interactive and used right on the Lock Screen, so you can do things like control smart home devices or check off tasks without opening an app. Widgets can also be customized and personalized with different sizes, colors, and styles. However, widgets can also drain your battery if they are constantly updating or fetching data from the internet or other sources.
Live Voicemail: Live Voicemail is a feature that lets you get a real-time transcription of a voicemail that someone is leaving so you can decide whether to answer the phone or not. Live Voicemail can be very convenient and helpful, but it can also use up some battery power as it requires your phone to listen and process the incoming audio.
Software Updates: Software updates are essential for keeping your iPhone secure, stable, and compatible with the latest apps and features. However, software updates can also cause some temporary or permanent issues with your battery life. For example, when you update your iPhone to a new version of iOS, it might need to perform some background tasks such as indexing files, syncing data, or optimizing performance. These tasks can take up some battery power until they are completed. Sometimes, software updates can also introduce bugs or glitches that affect your battery life until they are fixed by Apple or the app developers.
App Usage: App usage is one of the most obvious and common factors that affect your battery life. The more apps you use, the more battery power you consume. Some apps are more battery-intensive than others, depending on what they do and how often they run in the background. For example, apps that use GPS, camera, microphone, or internet connection can drain your battery faster than apps that don’t. Apps that have bugs or compatibility issues can also cause excessive battery drain.

How to Check Your iPhone 15 Battery Usage and Health

Before you try to fix your iPhone 15 battery drain issue, it is a good idea to check your battery usage and health. This can help you identify which apps or features are consuming the most power and how well your battery is performing overall. To check your battery usage and health, follow these steps:

Open the Settings app on your iPhone 15.
Tap on Battery.
Scroll down to see the graphs and the list of apps that show you how much battery power you have used in the last 24 hours or 10 days. You can tap on the bars or the clock icon to see more details about your screen time and background activity.
To see which apps draw the most power, start the Settings app and then tap Battery. Scroll down to the list of apps, and you can see which ones are running your battery down the fastest. Note that you can see the battery usage just within the Last 24 Hours or over the Last 10 Days using the tabs above the graphs1.
Tap on Battery Health to see the maximum capacity and peak performance capability of your battery. The maximum capacity shows you how much charge your battery can hold compared to when it was new. The peak performance capability shows you if your battery is able to deliver normal power or if it needs to be throttled to prevent unexpected shutdowns.

How to Fix iPhone 15 Battery Drain on iOS 17

If you have identified some apps or features that are causing your iPhone 15 battery drain issue, you can try some of the following solutions to fix it and extend your battery life. Note that some of these solutions might disable some functions or reduce some convenience on your iPhone, so you need to balance between battery life and user experience.

Turn Off Live Activities

As mentioned earlier, Live Activities are a new feature that lets apps keep an ongoing notification on the Lock Screen or Dynamic Island. Live Activities can be useful and informative, but they can also consume a lot of battery power, especially if you have many apps that use them or if you have an iPhone 15 Pro or Pro Max with an Always-On display.

To turn off Live Activities, follow these steps:

Open the Settings app on your iPhone 15.
Tap on Face ID & Passcode.
Enter your passcode to unlock your iPhone.
Scroll down and toggle off Live Activities. This will prevent Live Activities from showing up on the Lock Screen2.
You can also disable Live Activities on an app-by-app basis by going to the individual app sections in the Settings app and turning off Live Activities there2. Alternatively, you can avoid using Live Activities features within apps.

Delete Lock Screen and Home Screen Widgets

Widgets are another feature that has been improved in iOS 17. Widgets can now be interactive and used right on the Lock Screen, so you can do things like control smart home devices or check off tasks without opening an app. Widgets can also be customized and personalized with different sizes, colors, and styles.

However, widgets can also drain your battery if they are constantly updating or fetching data from the internet or other sources. If you are not using a particular widget often, it might be best to remove it to preserve battery life.

To delete widgets from your Lock Screen or Home Screen, follow these steps:

On your Lock Screen or Home Screen, touch and hold a widget until it jiggles.
Tap on the minus sign (-) on the top-left corner of the widget.
Tap Remove Widget to confirm 2.
Repeat these steps for any other widgets that you want to delete.

Turn Off Live Voicemail

Live Voicemail is a feature that lets you get a real-time transcription of a voicemail that someone is leaving so you can decide whether to answer the phone or not. Live Voicemail can be very convenient and helpful, but it can also use up some battery power as it requires your phone to listen and process the incoming audio.

To turn off Live Voicemail, follow these steps:

Open the Phone app on your iPhone 15.
Tap on Voicemail at the bottom-right corner of the screen.
Tap on Settings at the top-right corner of the screen.
Toggle off Live Voicemail 2.

Update Your Apps and Software

Software updates are essential for keeping your iPhone secure, stable, and compatible with the latest apps and features. However, software updates can also cause some temporary or permanent issues with your battery life. For example, when you update your iPhone to a new version of iOS, it might need to perform some background tasks such as indexing files, syncing data, or optimizing performance. These tasks can take up some battery power until they are completed. Sometimes, software updates can also introduce bugs or glitches that affect your battery life until they are fixed by Apple or the app developers.

To update your apps and software, follow these steps:

Open the App Store app on your iPhone 15.
Tap on your profile picture at the top-right corner of the screen.
Scroll down to see the list of apps that have updates available.
Tap on Update All to update all your apps at once, or tap on Update next to each app that you want to update individually.
To check for software updates, open the Settings app on your iPhone 15.
Tap on General.
Tap on Software Update.
If there is an update available, tap on Download and Install. If not, you will see a message saying Your iPhone is up to date.

Disable Background App Refresh

Background App Refresh is a feature that lets apps run in the background and refresh their content even when you are not using them. This can be useful for apps that need to update frequently, such as news, weather, social media, or messaging apps. However, Background App Refresh can also drain your battery if it is enabled for too many apps or if the apps are not optimized for battery efficiency.

To disable Background App Refresh, follow these steps:

Open the Settings app on your iPhone 15.
Tap on General.
Tap on Background App Refresh.
You can choose to turn off Background App Refresh completely by toggling off the switch at the top of the screen. This will prevent any app from running in the background and refreshing its content.
You can also disable Background App Refresh on an app-by-app basis by toggling off the switch next to each app that you don’t want to run in the background. Alternatively, you can choose to allow Background App Refresh only when your iPhone is connected to Wi-Fi by selecting Wi-Fi from the options at the top of the screen.

Adjust Your Screen Brightness and Auto-Lock

Your screen brightness and auto-lock settings can also affect your battery life. The brighter your screen is, the more power it consumes. The longer your screen stays on when you are not using your iPhone, the more power it wastes. Therefore, it is advisable to lower your screen brightness and shorten your auto-lock time to save battery.

To adjust your screen brightness and auto-lock settings, follow these steps:

Open the Settings app on your iPhone 15.
Tap on Display & Brightness.
Drag the slider under Brightness to adjust the brightness level of your screen. You can also enable Auto-Brightness by toggling on the switch next to it. This will allow your iPhone to automatically adjust the brightness of your screen based on the ambient light conditions.
Tap on Auto-Lock and select a shorter time interval for your screen to turn off automatically when you are not using your iPhone. The shortest option is 30 seconds.

Use Low Power Mode

Low Power Mode is a feature that reduces the power consumption of your iPhone by limiting some functions and features. When Low Power Mode is enabled, your iPhone will do things like dimming your screen, disabling background app refresh, reducing visual effects, lowering network speed, and stopping automatic downloads and updates. Low Power Mode can help you extend your battery life when you are running low on power or when you want to conserve power for later.

To use Low Power Mode, follow these steps:

Open the Settings app on your iPhone 15.
Tap on Battery.
Toggle on Low Power Mode.
You can also enable Low Power Mode from the Control Center by swiping down from the top-right corner of your screen and tapping on the battery icon.

Turn Off Location Services

Location Services is a feature that allows apps to access your location information for various purposes, such as providing navigation, weather, recommendations, or ads. Location Services can be useful and convenient, but it can also drain your battery if it is enabled for too many apps or if the apps are not optimized for battery efficiency.

To turn off Location Services, follow these steps:

Open the Settings app on your iPhone 15.
Tap on Privacy.
Tap on Location Services.
You can choose to turn off Location Services completely by toggling off the switch at the top of the screen. This will prevent any app from accessing your location information.
You can also turn off Location Services on an app-by-app basis by tapping on each app and selecting Never or While Using the App from the options. Alternatively, you can choose to allow Location Services only when your iPhone is in use by selecting While in Use from the options at the top of the screen.

Disable Push Notifications

Push Notifications are alerts that pop up on your screen or make a sound when an app wants to notify you of something, such as a new message, a news update, a reminder, or a promotion. Push Notifications can be helpful and informative, but they can also drain your battery if they are enabled for too many apps or if they are too frequent or irrelevant.

To disable Push Notifications, follow these steps:

Open the Settings app on your iPhone 15.
Tap on Notifications.
Scroll down to see the list of apps that have notifications enabled.
Tap on each app that you want to disable notifications for.
Toggle off Allow Notifications. This will prevent the app from sending you any notifications.
You can also customize the notification settings for each app by adjusting the options for Sounds, Badges, Banners, Lock Screen, Notification Center, and Siri Suggestions.

Fetch Email Less Frequently

Fetching email is a process that allows your iPhone to check for new emails from your email accounts and download them to your device. Fetching email can be useful and convenient, but it can also drain your battery if it is set to fetch email too frequently or if you have too many email accounts.

To fetch email less frequently, follow these steps:

Open the Settings app on your iPhone 15.
Tap on Mail.
Tap on Accounts.
Tap on Fetch New Data.
You can choose to turn off Push by toggling off the switch at the top of the screen. This will prevent your iPhone from automatically fetching new data from your email accounts.
You can also adjust the fetch schedule for each email account by tapping on each account and selecting Manually or a longer time interval from the options. Alternatively, you can choose to fetch new data only when your iPhone is connected to power by selecting Automatically from the options at the top of the screen.

Use Wi-Fi and Airplane Mode

Using Wi-Fi and Airplane Mode can also help you save battery life on your iPhone 15. Wi-Fi uses less power than cellular data, so you should use Wi-Fi whenever possible instead of cellular data. Airplane Mode turns off all wireless connections on your iPhone, such as Wi-Fi, cellular data, Bluetooth, and GPS. Airplane Mode can help you conserve battery when you are not using your iPhone or when you are in an area with poor signal or no service.

To use Wi-Fi and Airplane Mode, follow these steps:

Open the Settings app on your iPhone 15.
Tap on Wi-Fi.
Toggle on Wi-Fi and select a Wi-Fi network to connect to. You can also enable Ask to Join Networks by toggling on the switch next to it. This will prompt you to join nearby Wi-Fi networks when available.
To enable Airplane Mode, swipe down from the top-right corner of your screen to access the Control Center and tap on the airplane icon. Alternatively, you can open the Settings app and toggle on Airplane Mode. Note that this will disable all wireless connections on your iPhone, so you will not be able to make or receive calls, send or receive messages, or use internet services unless you turn off Airplane Mode or enable Wi-Fi or Bluetooth separately.

Avoid Extreme Temperatures

Extreme temperatures can also affect your battery life and performance. According to Apple, the ideal temperature range for using your iPhone is between 16°C and 22°C (62°F to 72°F). If your iPhone is exposed to temperatures lower than 0°C (32°F) or higher than 35°C (95°F), it might cause some issues such as reduced battery capacity, faster battery drain, unexpected shutdowns, or reduced functionality.

To avoid extreme temperatures, follow these tips:

Do not leave your iPhone in direct sunlight or in a hot car for a long time.
Do not use your iPhone in very cold environments or store it in a freezer or refrigerator.
Do not charge your iPhone in very hot or very cold conditions.
Remove any cases or covers that might trap heat or block ventilation on your iPhone.
If your iPhone gets too hot or too cold, let it cool down or warm up gradually before using it.

Replace Your Battery If Needed

If none of the above solutions work for you, or if your battery health is very low, you might need to replace your battery. Replacing your battery can restore your battery capacity and performance to a normal level. However, replacing your battery can also be costly and risky, especially if you do it yourself or use an unauthorized service provider. Therefore, you should only replace your battery if it is absolutely necessary and if you are confident about the process.

To replace your battery, follow these steps:

Check your warranty status and eligibility for battery service by visiting [Apple’s support website] and entering your iPhone’s serial number. You can find your serial number by opening the Settings app, tapping on General, and tapping on About.
If your iPhone is covered by AppleCare+ or the Apple Limited Warranty, you can contact Apple or an Apple Authorized Service Provider to arrange a battery replacement. You can find the nearest service location by visiting [Apple’s support website] and entering your location.
If your iPhone is out of warranty or not eligible for battery service, you can still contact Apple or an Apple Authorized Service Provider to get a quote for a battery replacement. Alternatively, you can try to replace the battery yourself by following [Apple’s instructions] or using a third-party kit. However, this is not recommended as it might void your warranty, damage your iPhone, or cause safety issues.

How to Avoid iPhone 15 Battery Drain on iOS 17 in the Future

Now that you have fixed your iPhone 15 battery drain issue, you might want to avoid it from happening again in the future. Here are some tips on how to prevent iPhone 15 battery drain on iOS 17 in the future:

Monitor your battery usage and health regularly by checking the Battery section in the Settings app. This can help you identify any apps or features that are consuming too much power and take appropriate actions to reduce them.
Adjust your settings and preferences according to your needs and habits. For example, you can turn off or limit some features that you don’t use often, such as Live Activities, Widgets, Live Voicemail, Background App Refresh, Location Services, Push Notifications, and Fetch Email. You can also lower your screen brightness and shorten your auto-lock time to save power.
Use Low Power Mode when you are running low on power or when you want to conserve power for later. Low Power Mode can reduce the power consumption of your iPhone by limiting some functions and features.
Update your apps and software regularly to get the latest bug fixes and performance improvements. This can help you avoid any issues that might affect your battery life.
Use Wi-Fi and Airplane Mode whenever possible instead of cellular data. Wi-Fi uses less power than cellular data, and Airplane Mode turns off all wireless connections on your iPhone.
Avoid extreme temperatures that might damage or degrade your battery. The ideal temperature range for using your iPhone is between 16°C and 22°C (62°F to 72°F).
Replace your battery if needed. If your battery health is very low or if you experience any problems with your battery performance, you might need to replace your battery.

Conclusion

iPhone 15 battery drain on iOS 17 is a common issue that many users face. It can be caused by various factors, such as new features, software updates, app usage, settings, preferences, and environmental conditions. However, there are also some possible solutions to fix it and extend your battery life.

In this article, we have explained what causes iPhone 15 battery drain on iOS 17, how to check your battery usage and health, and how to fix iPhone 15 battery drain on iOS 17. We have also shared some tips on how to prevent iPhone 15 battery drain on iOS 17 in the future.

We hope this article has been helpful and informative for you. If you have any questions or feedback, please feel free to leave a comment below. Thank you for reading! 😊