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Increase iPhone 15 Battery Life: What's Behind Dying Battery and How to Fix It

Is your iPhone 15 or 15 Pro having shorter battery life than expected? It's not just you. Let's take a look at seven tips and tricks to help improve your iPhone 15's battery life, reasons why your battery drain is soaring, and more.

Update February 4, 2024:We recently saw a report that one of the most common complaints from iPhone 15 Pro users is poor battery life. Find out more about it here and share your experience in our survey.

The iPhone 15 line has, according to Apple, the same battery life as the iPhone 14 models.

  • iPhone 15 battery life: what you get and how it differs from the iPhone 14 and other models

But along with the initial setup and the “honeymoon” phase when your new iPhone consumes more battery, this year there has been an issue with some apps overheating. Apple is working on a software update, but you can reduce or fix the problem in several ways right now.

Table of Contents

  • iPhone 15 overheating and solutions
  • What causes a sudden jump in battery consumption?
  • How to increase the battery life of iPhone 15
    • 1. How do apps use up battery power?
    • 2. Low power mode
    • 3. Auto-lock, always-on display, screen brightness
    • 4. Hot and cold temperature.
    • 5. Background application update
    • 6. Location services
    • 7. Push and Fetch
  • Summing up

iPhone 15 overheating

After early customers noticed overheating problems with iPhone 15 devices, Apple has solved the problem with iOS 17.0.3 in October 2023.

What causes battery usage to spike?

  • Restoring a backup
    • Loading a large library of photos/videos can be especially draining on energy.
    • The iPhone gets hotter when recovering and uses more battery power.
  • Using applications with constant location tracking
  • An application with a high background. activity
  • Using your new iPhone more than usual, checking out new features, cameras, etc.

Many other factors play a role, but these four deserve attention.

Many other factors play a role, but these four deserve attention.

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If you just got your iPhone 15, even after restoring from a backup, it will take time to fully load your entire photo library, all your apps/data, etc. Your iPhone works harder and gets hotter than usual, so it uses more battery charge than usual.

In the Photos app, you can pause iCloud sync/download until the evening. If it doesn't happen automatically, open the Apple Photos app > Library > All photos > Swipe down and tap Pause. Continuing to do this while charging in the evening will help you save battery power.

How to increase iPhone 15 battery life

7 options instead of using a battery:

1. How do apps use up battery power?

Go toSettings>> Batteryto view detailed battery usage information. Last 24 Hours is the default and shows which apps are using the most power (including Home, Lock Screen, and Siri).

  • Tap the Last X Days toggle on the right gives you a broader view of what's eating up your energy.
  • Look for “Background Activity” under an app to see if it's draining scene energy.
  • Also, check out the battery life recommendations just above the battery usage level (above). This will give you quick and effective ways to reduce battery drain.

2. Low Power Mode

Low Power Mode is a quick way to extend battery life. This feature works by pausing mail, background app updates, automatic downloads, and more with just one button. This is not a feature for everyday use, but it is handy.

You can enable Low Power Mode under Settings > Batteryor ask Sirido it. However, it is useful to have quick access to the power saving mode in the Control Center. Go toSettings > Control Center > Customize your controlsthen tap the + icon next to Low Power Mode if it's not already there.

  • This is useful to stop all background app activity if you've recently installed a new iPhone

3. Auto-lock, screen brightness and always on display

If you notice the “Home & Lock screen” battery drain is higher than you expected, it's a good idea to check these settings.

Auto-locking after 30 seconds will help extend battery life.

Go to Settings > Display & Brightness > Auto-lock.

Lowering the screen brightness will also help extend battery life, but this comes down to personal preference. This can be done in Control Center (swipe down from the top right corner) or inSettings > Display & Brightness.

The iPhone 15 Pro's HDR brightness reaches 1600 nits and peak outdoor brightness of 2000 nits is worth keeping an eye on.

Always-on display

Like the 14 Pro, the iPhone 15 Pro's always-on display shouldn't drain much of your battery because the refresh rate is so low. But if you want to extend your battery's life as long as possible, turning it off can save you as little as 1% of battery usage per hour.

  • How much does the iPhone 14 Pro's always-on display drain the battery with or without background mode [Video]

Go to Settings > Display and brightness > Always onDisplayat the bottom.

Another option is to leave always-on mode enabled, but disable colored wallpapers and/or notifications:

  • How to set up always-on mode on iPhone

4. Hot and Cold Temperatures

Apple says the iPhone's “comfort zone” is an ambient temperature between 32° and 95° F (0° and 35° C). Temperatures above 95°F (35°C) may cause “permanent damage to battery capacity.”

  • In addition to protecting your iPhone from excessive heat, it's best to remove the case from your iPhone if you notice this. It gets warm while charging or restoring from a backup.
  • Meanwhile, temperatures below 32°F (0°C) may temporarily shorten battery life. If you live in a cold climate, placing your iPhone closer to your body in an inside pocket will help extend battery life by keeping it warmer.

5. Background app refresh

Low power mode disables background app refresh across the board, but you can customize which apps use the feature for a smoother experience as well as improved battery life. Go to Settings > General > Background application update.

You can also choose to use Wi-Fi-only background app updates in addition to Wi-Fi and cellular, or disable the feature entirely. However, for most users, it's best to leave Wi-Fi and cellular on and specify which apps will be used for background updates.

Turning off background app updates prevents apps you don't actively use from updating (until you open them again).

6. Location services

Changing location services settings is another way to extend battery life. (This can also reduce your cellular data usage.) Go to Settings > Confidentiality and amplification; Security > Location Servicesto update privileges for your applications.

  • Pay attention to any apps that ask you to Always use your location and switch to While using, Ask next time, or Never.

7. Push and Fetch

If you choose not to use Power Saving Mode, you can manually manage Push and Fetch for your email/Internet accounts.

Best comment from Manbearpig

Liked by 7 people

Got an iPhone 15 pro.

The iPhone was set up as new and a full restore to version 17.0.2 was performed rather than just an update.

Background updates are disabled.

Most notifications are disabled.

Always on display is off.

No mail configured to receive/send.

Auto-lock – 30 seconds.

Maximum operating time 5 hours of screen time on the entire battery, and that's without gaming or anything even remotely intense.

If I start taking photos or doing quick editing, etc., I'll be lucky if I get 4 hours .

My 13pro can easily get 10 hours.

Apple seriously needs to fix this ASAP.

View all comments

Go to Settings > Mail > Accounts > Get new datas. One approach is to set your major accounts to push to receive new mail as soon as possible, and set your less important accounts to receive every hour or even set them to manual.

Increase the battery life of your iPhone 15

Hopefully these tips will reduce your iPhone's battery drain and Apple will likely release a software solution to the overheating problem very soon.

If you find that you don't want to change the settings above, another option is to simply grab a power bank or MagSafe battery.

More 9to5Mac tutorials :

  • iPhone 15 vs 15 Pro: Here's all the differences
  • iOS 17's iPhone screen distance protects your eyes, here's how it works
  • iOS 17 iPhone StandBy : How to use and set up the smart display feature
  • A17 Pro vs A16 Bionic: comparison of speed, efficiency and features

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