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How to fix iPhone battery life problems

There could be several reasons why you might need to fix iPhone battery problems. It could be the result of some intensive process that you just need to wait out, or it could be something more serious. In any case, here’s how you can handle iPhone battery life problems.

How to fix iPhone battery life problems

Whether you restore from backup or set up as new, your iPhone or an updated version of iOS 15 (read our iOS 15 review for more on the new features) could expand up a lot of power downloading apps, games, mail, photos, and other content. That’s because the Wi-Fi radio stays on for a long time, and Spotlight — the iOS search system — has to index everything. Some apps rebuild their own libraries and databases as well. When radios and processors can’t sleep, power consumption goes way up.

If you’ve just upgraded to a new iPhone, updated to the latest version of iOS, or restored your iPhone, give things a day or so to finish up and go back to normal. If you’re fine after that, great. If not, keep reading!

In addition to the system taking a while to really finish transferring everything over, we also tend to spend a long time playing with new phones and new features. That’s especially true with things like Animoji, Portrait Lighting, and Augmented Reality (AR) apps. So the screen stays on, storage gets written to, Wi-Fi and maybe cellular radios stay lit up, and power gets consumed.

In other words, if your battery feels like it’s only lasting half as long, the first step to fixing it is figuring out if you’re using it twice as much.

So, note how much battery life you have left. Then put your iPhone down for 20 to 40 minutes. When you pick it back up, note how much battery life you have left again. If there isn’t a big change while in standby, you’re probably okay, and your battery life will return to normal when your usage returns to normal (after the novelty wears off).

If this doesn’t fix iPhone battery problems and it continues to drain and drain fast, even when you weren’t using it, keep reading!

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How to reset your iPhone

Rebooting, restarting, or resetting is the oldest cliche in troubleshooting because it works. Sometimes a good reset is all that’s needed to kick bad bits loose.

To reset iPhone 8, 2nd-generation iPhone SE, or iPhones with Face ID:

  1. Quickly click and release the Volume Up button.
  2. Quickly click and release the Volume Down button.
  3. Press and hold the Side button (sleep/wake, on/off).

    Rebooting iPhone showing steps to reboot iPhone X by pressing the volume buttons, then the side buttonSource: iMore

To reset iPhone 7:

  1. Press and hold down the On/Off button on the right side
  2. While continuing to hold the On/Off button, press and hold the volume down button on the left side of your iPhone.
  3. Hold both buttons as the screen turns offand keep holding them until the screen turns back on and displays the Apple logo.

    Rebooting iPhone showing steps to reboot the iPhone 7 by pressing and holding the volume down and on/off buttons until the Apple logo appears

    Rebooting iPhone showing steps to reboot the iPhone 7 by pressing and holding the volume down and on/off buttons until the Apple logo appearsSource: iMore

For iPhone 6s and older:

  1. Press and hold down both the Sleep/Wake button and the home button at the same time.
  2. Keep them held down until you see an Apple logo.
  3. Let go.

    Rebooting iPhone showing steps to reboot the iPhone 6 by pressing the Home button and On/Off button until the Apple logo shows

    Rebooting iPhone showing steps to reboot the iPhone 6 by pressing the Home button and On/Off button until the Apple logo showsSource: iMore

Once your iPhone has rebooted, repeat the previous steps, and see if the battery drain has returned to normal. If this doesn’t fix iPhone battery problems, keep reading!

How to check your iPhone’s battery usage

iOS contains a terrific battery usage — aka battery shaming — utility that lets you know exactly which apps and services are using your battery and how.

  1. Launch Settings from your Home screen.
  2. Tap on Battery, Wait a moment for Battery Usage to populate.

    Battery troubleshooting showing how to check battery usage by opening Settings, then tapping Battery

    Battery troubleshooting showing how to check battery usage by opening Settings, then tapping BatterySource: iMore

  3. Tap on the Show Activity button to get a breakdown of foreground and background power usage.
  4. Tap on Last 10 Days to get a broader look at power consumption over time.

    Battery troubleshooting showing how to get details of what's using the battery by tapping Show Activity then tapping a timeframe

    Battery troubleshooting showing how to get details of what's using the battery by tapping Show Activity then tapping a timeframeSource: iMore

It can be tricky to understand, but here’s the deal: If you see iCloud Photo Library there and you’ve just upgraded, it’s a sign you’re downloading thumbnails, and things should return to normal when you’re done. If you see Facebook there and it says 4% on screen and 40% on background, it’s a sign something has gone wrong.

At that point, you can force-quit a rogue app and likely get your power consumption back to normal.

To force-quit an app on iPhones with a Home button:

  1. double click the Home button to bring up the fast app switcher.
  2. Swipe to the app you want to force quit.
  3. Touch the app card and flick it up and off the screen

    Battery troubleshooting showing how to force quit apps on an iPhone with a Home button by double-clicking Home button and swiping up on an app

    Battery troubleshooting showing how to force quit apps on an iPhone with a Home button by double-clicking Home button and swiping up on an appSource: iMore

To force-quit an app on iPhones with Face ID:

  1. Swipe up from the bottom of the screen and hold your finger in place for a moment until the card-like multitasking interface appears.
  2. Swipe to the app you want to force quit.
  3. Flick the app card up.

    Battery troubleshooting showing how to force quit apps on an iPhone with Face ID by swiping up from the bottom, swiping through your apps, then swiping up on the app you want to quit

    Battery troubleshooting showing how to force quit apps on an iPhone with Face ID by swiping up from the bottom, swiping through your apps, then swiping up on the app you want to quitSource: iMore

If an app appears to be consistently misbehaving, you can try re-installing it or even switching to an alternative app or a service’s website for some of your activity.

How to check your iPhone’s battery health

Your iPhone has a section showing Battery Health information. It reveals the current maximum capacity and peak performance capability. It will also inform you if your iPhone is being slowed down, whether it needs service, and will even allow you to turn off advanced power management — now called performance management — if you so choose.

  1. Tap on Battery in the Settings app.
  2. Tap on Battery Health,

    Battery troubleshooting showing how to check your iPhone's battery health by tapping Battery in Settings and tapping Battery Health

    Battery troubleshooting showing how to check your iPhone's battery health by tapping Battery in Settings and tapping Battery HealthSource: iMore

If your iPhone had been slowed down due to prevent an unexpected shutdown, iOS will restore it to its previous, unmanaged performance levels. Performance management will only kick back in when and if you experience another unexpected shutdown. Until then, it’s a clean slate.

It’s worth noting what the percentages you see on the Battery Health screen actually mean. At 100% health, your battery should experience peak performance. When Battery Health is at 95%, that means that your iPhone has experienced a shutdown, and Performance management has now been applied. If your phone’s battery health is at 79% or less, it has been significantly degraded. At this point, you should probably take your iPhone to an Apple Authorized Service Provider for replacement.

How to restore your iPhone as new

Sometimes restoring from an old backup, especially a backup of a different device like an iPad, can be less than ideal. Cruft builds up, and things just don’t run like they used to. Sometimes your once-fresh setup also goes stale.

If you suspect that’s the case, you can suck it up and set up your iPhone as new, Yes, it can be an incredible pain in the apps, but if you have a significant and continual problem, and nothing else can fix it, setting up as new can be a solution. First, you’ll need to erase your iPhone.

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  1. Tap General in the Settings app.
  2. Tap Reset,

    Battery troubleshooting showing how to reset your iPhone by tapping General in Settings, then tapping Reset

    Battery troubleshooting showing how to reset your iPhone by tapping General in Settings, then tapping ResetSource: iMore

  3. Tap Erase All Content and Settings,
  4. Tap Erase Now since you’re going to be restoring your iPhone as new.

    Battery troubleshooting showing how to reset your iPhone by tapping Erase all content and Settings, then tapping Erase Now

    Battery troubleshooting showing how to reset your iPhone by tapping Erase all content and Settings, then tapping Erase NowSource: iMore

After you’ve nuked your device back to the Stone Age, you’re going to need to set it up as a new device, rather than transferring your data back to your device.

How to turn on Low Power Mode

  1. Launch the Settings app from the Home screen.
  2. Tap Battery,
  3. Toggle Low Power Mode to on,

    Battery troubleshooting showing how to enter Low Power Mode by tapping Settings, then Battery, then tapping the switch for Low Power Mode

    Battery troubleshooting showing how to enter Low Power Mode by tapping Settings, then Battery, then tapping the switch for Low Power ModeSource: iMore

Equipment to keep your iPhone fully charged

If you’re dealing with power drain issues on your iPhone, it might be time for an upgrade, and you’ve got some choices on the best iPhone for your needs. If you’re not ready to upgrade today, however, a good battery may do the trick in the case.

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