Why Is My iPhone Battery Draining So Fast All Of A Sudden

By Vernon Roderick, Last updated: September 15, 2020

iPhone is one of the popular mobile devices which is designed and developed by Apple. It runs on an iOS system that allows you to make and receive calls, manage files, emails, capture photos, play videos and games, and other functions. There is an instance when you experience an issue such as why is my iPhone battery draining so fast all of a sudden.

There are a number of reasons that cause this problem. To help you fix it, this article provides multiple methods that you can follow including backing up and restoring data to your device should a need arises.

Part 1: Check Battery Usage and Health of Your iPhone DevicePart 2: How to Fix Issue: Why Is My iPhone Battery Draining So Fast All of A SuddenPart 3: In Summary

Part 1: Check Battery Usage and Health of Your iPhone Device

This section gives detailed steps on how to check the battery usage of your iPhone device and show the activity of apps that may contribute to power consumption.

How to check the battery usage of your iPhone:

  • Step 01: On your iPhone device, head on to Settings.
  • Step 02: Tap on Battery.
  • Step 03: Battery usage will be shown. Tap on Show Activity button.
  • Step 04: Tap on the Last 10 Days. You will see the apps that consume more power in the last ten days.

You can choose to force quit the said apps and see if your battery usage is still the same as before. In the next section are the different methods that you can try to resolve the issue of why is my iPhone battery draining so fast all of a sudden.

How to check the battery health of your iPhone:

  • Step 01: On your iPhone device, head on to Settings.
  • Step 02: Tap on Battery.
  • Step 03: Tap on Battery Health.

It will show the maximum capacity percentage of the battery and peak performance capability. The maximum capacity is the measure of the battery capacity relative to when it was new. Lower capacity may result in fewer hours of usage.
Why Is My iPhone Battery Draining So Fast All Of A Sudden

Part 2: How to Fix Issue: Why Is My iPhone Battery Draining So Fast All of A Sudden

This section provides various processes that will provide guidance on how to fix the issue of why is my iPhone battery draining so fast all of a sudden. There are a number of causes as to why it occurs, it may be a software or a hardware issue.

Turn off Bluetooth or Wi-Fi When Not in Use

When Bluetooth or Wi-Fi setting is turned on, it can consume more power which can drain your battery fast. It is wise to turn these settings off when not in use. When you are also using mobile data, make sure to turn off the Wi-Fi setting.

  • Step 01: On your iPhone device, head on to Settings.
  • Step 02: Tap on Wi-Fi.
  • Step 03: Tap on the Wi-Fioption to toggle it off (must be grayed out).
  • Step 04: Go back to Settings.
  • Step 05: Tap on Bluetooth.
  • Step 06: Switch off the Bluetooth
  • Step 07: Disconnect the connecting devices.

You can also access the settings via the Control Center. Swipe up your screen and find the Bluetooth and Wi-Fi icons. The icon should not be highlighted if it is turned off.

Turn on Low Power Mode When Battery is Low

When your iPhone battery goes low, you can turn on the Low Power mode for additional battery life. A Low Power mode turns off or reduces some processes in your iPhone devices such as automatic downloads, Wi-Fi, background apps, effects, and other features until you can charge your device completely.

To help extend the lifespan of your battery, make sure that you do not drain the battery too much to 0%. Charge your iPhone device as soon as it notifies you of low battery, usually before it gets lower than 20% battery.

  • Step 01: On your iPhone device, head on to Settings.
  • Step 02: Tap on Battery.
  • Step 03: Tap on the Low Power Mode option to toggle it on (must be in green color).

In Control Center:

  • Step 01: On your iPhone device, head on to Settings.
  • Step 02: Go to Control Center.
  • Step 03: Tap on Customize Controls.
  • Step 04: Select Low Power Mode and add it to Control Center.
Turn on Low Power Mode to Fix Issue: Why Is My iPhone Battery Draining So Fast All of A Sudden

Reduce Brightness in Your iPhone Device

If too much brightness is set in your iPhone device, it will also consume much battery usage. Reduce the brightness by setting it to medium bright or lower. You can also try turning off the Auto-Brightness feature in your device as it adjusts according to a requirement resulting in your iPhone battery draining so fast all of a sudden.

  • Step 01: On your iPhone device, go to Settings.
  • Step 02: Tap on Display & Brightness.
  • Step 03: Tap on the Auto-Brightness option to toggle it off (must be grayed out).

Force Quit the Apps that Consume More Power

Apps that are launched and are running may also consume more battery usage. You can check in the Battery settings to check the consumption activity of the app and force quit it to see if it can reduce the power usage.

  • Step 01: On your iPhone device, double tap on the Home button. Or for other iPhone versions, swipe up from the bottom of the screen until the app switcher will appear.
  • Step 02: The app switcher will appear. Select the app that you want to force quit.
  • Step 03: Swipe up the app card to quit and close it.

It is also possible if the recent update to your app causes you to drain your iPhone battery fast, try uninstalling the updates or the app to check.

Restart the iPhone Device

Restart your iPhone device to clear the memory and cache after force quitting all apps that are running.

  • Step 01: Press the Power On/Off button for a few seconds until the Apple logo appears.
  • Step 02: Swipe the Slide to power off icon from left to right to turn off your iPhone.
  • Step 03: Press again the Power On/Off button to turn on the mobile device.

Update your Apps

If your apps are already outdated, it may cause your battery to drain fast. Try to reinstall your apps to get the latest updates from the developers.

  • Step 01: On your iPhone device, launch the App Store.
  • Step 02: Tap on Update All.
  • Step 03: Wait until all app updates are installed.
Update Apps

Turn off Airplane Mode

How do I stop my iPhone battery from draining so fast? When there is a poor cellular signal in your area, the tendency is your iPhone device will consume more power to get a good signal to receive calls and support a good data connection. If you are in an area with a very low signal, try switching on to Airplane mode and switch it off when you reach an area with a good signal. When on an Airplane mode, you will not able to make or receive calls.

  • Step 01: On your iPhone device, head on to Settings.
  • Step 02: Tap on the Airplane Mode option to toggle it on (must be in green color).
  • To turn it off, tap on it again to toggle it off (grayed out).

Turn off Vibration in Your iPhone device

Review the setting on your iPhone if the vibration feature is turned on for every notification you will receive as it can result in the issue that why is my iPhone battery draining so fast all of a sudden.

  • Step 01: On your iPhone device, head on to Settings.
  • Step 02: Tap on
  • Step 03: Tap on Vibrate on Ring option to toggle it off (grayed out).
  • Step 04: Tap on Vibrate on Silent option to toggle it off (grayed out).

Change the Dynamic Wallpaper in Your iPhone device

Dynamic wallpapers may drain your iPhone battery faster than that of still wallpapers. You can change the wallpaper into a non-moving one or turn off the wallpaper. You can set the Lock and Home screen wallpapers to be non-dynamic.

  • Step 01: On your iPhone device, head on to Settings.
  • Step 02: Tap on
  • Step 03: Tap on Choose a New Wallpaper.
  • Step 04: Tap on the Stills
  • Step 05: Select your desired wallpaper.
  • Step 06: On the wallpaper review, tap on Perspective Zoom: Off to disable wallpaper movement.
  • Step 07: On the bottom of the screen, tap on Set.
  • Step 08: Tap on the Set Both

Reduce Screen Motion

To reduce the screen motion effects in your iPhone device, you can choose to turn it off to avoid your iPhone battery to drain so fast by following the steps below.

  • Step 01: On your iPhone device, head on to Settings.
  • Step 02: Tap on
  • Step 03: Select
  • Step 04: Tap on Reduce Motion.
  • Step 05:Tap on Reduce Motion option to toggle it on (must be in green color).

Turn off Location Services

To address the issue of why is my iPhone battery draining so fast all of a sudden, try to turn off Location Services as it uses Bluetooth, GPS, and Wi-Fi hotspot to get the location for your apps. You can also choose what specific app will have access to Location Services.

  • Step 01: On your iPhone device, head on to Settings.
  • Step 02: Tap on
  • Step 03: SelectLocation Services.
  • Step 04: Tap on the Location Services option to toggle it off (grayed out).
  • Or choose the particular app that will use the Location Services.
  • Step 05:Select Never if the app will not use the Location Services.

Verify Your iPhone Device Runs on the Latest iOS Version

Check that your iPhone device runs on the most recent updates of iOS installed in order to prevent the issue that why is my iPhone battery draining so fast all of a sudden.

  • Step 01: On your iPhone device, go to
  • Step 02: Tap on General.
  • Step 03: Tap on Software Update.
  • Step 04: You will be prompted if there are updates available. Tap on Download and Install.
  • Step 05: Restart your iPhone device after the updates are installed successfully.

Reset Your iPhone Device

Try to reset your iPhone device to its original factory settings and see if the issue on why is my iPhone battery draining so fast all of a sudden gets resolved. Note: all of your data in your iPhone will be erased so you must first perform a backup of your important data from your device. You can back up your data to iCloud or via iTunes on your computer. After the reset, you can restore the backed up data to your device.

  • Step 01: On your iPhone device, head on to
  • Step 02: Tap on General.
  • Step 03: Tap on Reset.
  • Step 04: Tap on Erase All Content and Setting.
  • Step 05: A popup will appear asking if you want to update your iCloud backup before erasing. This is important if you backup via iCloud. Tap on Back Up Then Erase.
  • Step 06: Enter the passcode when prompted and tap on Erase iPhone to start the reset.
  • Step 07: Wait until the reset process is finished. Make sure that your iPhone is connected to a power source to avoid interruptions.
  • Step 08: After the reset, restore the backed up data to your iPhone.

How to restore the backed up data:

  • Step 01: Turn on your iPhone device.
  • Step 02: Follow the on-screen instructions until you reach Apps & Data.
  • Step 03: Tap on Restore from iCloud Backup.
  • Step 04: Sign in to iCloud.
  • Step 05: Select the recent backup that you have made.
  • Step 06: Wait until the data transfer is complete and finish the setup in your device.
Reset iPhone Device

iOS Data Backup and Restore One click to backup the whole iOS device to your computer. Allow to preview and restore any item from the backup to a device. Export what you want from the backup to your computer. No data loss on devices during the restore. iPhone Restore Won't Overwrite Your Data Free Download Free Download FoneDog iOS Data Backup & Restore

Contact Apple Support

Contact the Apple Support online or you can visit an Apple Store near your area to check on your iPhone device. It might need a new battery replacement or you might need a new iPhone device.

Part 3: In Summary

Why is my iPhone battery draining so fast all of a sudden? This is a question asked by some of the users that experience the issue on their iPhone devices. This article provides the answers by discussing several ways with step by step instructions on what may have caused the issue and how to resolve it.

Free DownloadFree Download

Leave a Comment

Comment

Comment ()
author image

Vernon Roderick

Technical Expertise for PC / YouTube Scriptwriting /Website Optimization

One of my passion is to develop software of my own

I write articles to share knowledge about IT technology and some experience in developing my own software, and developing my own software is one of my passions for work.

iOS Toolkit logo

iOS Toolkit

3 Methods to recover your deleted data from iPhone or iPad.

Free Download Free Download

How Do You Like This Article?

Check icon/ Check icon

INTERESTINGDULL

Check icon/ Check icon

SIMPLEDIFFICULT

Thank you! Here' re your choices:

Rate This Article: Excellent

Rating: 4.8 / 5 (based on 78 ratings)

iOS Toolkit logo

iOS Toolkit

3 Methods to recover your deleted data from iPhone or iPad.

Free Download

FoneDog uses cookies to ensure you get the best experience on our website. Click here to learn more.