Your iPhone battery drains quickly because one or more apps, settings, or hardware features are using power faster than normal

Fast battery drain usually comes from one of three sources: an app running in the background and using the processor or location services, a setting like screen brightness or Bluetooth left on when you don't need it, or a hardware problem like a failing battery or a component that's stuck in a power-hungry state. The drain might be sudden (it started yesterday) or gradual (it's been getting worse for weeks). Finding which one is causing the problem takes a few minutes of checking, and most fixes are settings you can change yourself.

The first step is to look at which apps are using the most battery. Open Settings, tap Battery, then Battery Usage. You'll see a list of apps ranked by how much power they've used in the last 24 hours or the last 10 days—tap the toggle to switch between them. If one app is using far more than the others, that's usually your culprit.

Key Takeaways

  • Check which apps are draining the most battery in Settings > Battery > Battery Usage, and uninstall or restrict the ones using the most power.
  • Turn off location services for apps that don't need it, disable background app refresh for apps you don't use often, and reduce screen brightness or enable Auto-Brightness.
  • Turn off Bluetooth, Wi-Fi, and cellular data when you're not using them, and disable push notifications for apps that don't need to alert you.
  • If battery drain started suddenly and no single app is the cause, your iPhone's battery itself may be aging and losing capacity, which you can check in Settings > Battery > Battery Health.

Apps running in the background and using location services

Apps can drain battery even when you're not actively using them if they're running in the background. The most common culprits are apps that use location services (GPS), apps that sync data constantly (like email or messaging apps), and apps that play audio or video.

To stop an app from using location services, go to Settings, tap Privacy, then Location Services. You'll see a list of every app that has asked for location permission. Tap each one and change the setting from Always or While Using to Never for any app that doesn't actually need to know where you are. Maps, weather, and find-my-friends apps need location. Your banking app, notes app, and most games do not.

You can also turn off Background App Refresh for apps you don't use often. Go to Settings, tap General, then Background App Refresh. Toggle off the apps that don't need to update when you're not looking at them. Keep it on for email, messaging, and calendar if you want notifications, but turn it off for games, news apps, and social media you check manually.

Screen brightness and display settings

Your screen is one of the biggest power consumers on your iPhone. If brightness is set high or you're using a dynamic wallpaper, the display will drain battery quickly.

Go to Settings, tap Display & Brightness, and turn on Auto-Brightness. This lets your phone adjust brightness based on the light around you instead of you keeping it maxed out. If you prefer to control brightness manually, swipe down from the top-right corner of your screen to open Control Center and drag the brightness slider to the lowest level that's still comfortable to read.

Also check your lock screen and home screen wallpapers. A static image uses less power than a live or animated wallpaper. If you have a live wallpaper set, switch to a still image by going to Settings, tapping Wallpaper, then Choose a New Wallpaper and selecting a static photo.

Bluetooth, Wi-Fi, and cellular data left on

Bluetooth and Wi-Fi search for connections even when you're not actively using them, and this searching uses power. If you're not using Bluetooth headphones or a smartwatch, turn Bluetooth off. If you're on cellular data and don't need Wi-Fi, turn Wi-Fi off so your phone isn't scanning for networks.

Open Control Center by swiping down from the top-right corner, and tap the Bluetooth icon to turn it off, the Wi-Fi icon to turn it off, and the cellular icon (if you want to disable cellular data entirely, though this will stop calls and texts). You can also go to Settings and toggle these off individually if you prefer.

One less obvious drain: if you have 5G turned on and your carrier supports it, your phone uses more power searching for and connecting to 5G networks. If you don't need the speed, go to Settings, tap Cellular, then Cellular Data Options, and change Voice & Data from 5G Auto to LTE.

Push notifications and constant syncing

Apps that send you notifications constantly are waking up your phone's processor and screen. If you don't need when ready alerts from an app, turn off its notifications. Go to Settings, tap Notifications, find the app, and toggle off Allow Notifications.

Similarly, if you have multiple email accounts set to Push (which means they fetch new mail when ready), change them to Fetch (which checks every 15 or 30 minutes) or Manual (which only checks when you open the app). Go to Settings, tap Mail, then Accounts, select an account, tap Account, and change Fetch New Data. This is especially important if you have work email, which often pushes constantly.

Battery health and hardware problems

If you've checked apps and settings and nothing is obviously draining power, your iPhone's battery itself may be aging. All lithium batteries lose capacity over time—after 500 charge cycles (roughly one year of normal use), an iPhone battery typically holds about 80 percent of its original charge. If your phone is more than two years old, battery degradation is likely the cause.

Check your battery's health by going to Settings, tapping Battery, then Battery Health & Charging. You'll see a percentage labeled Maximum Capacity. If it's below 80 percent, your battery is aging and draining faster than it should. If it's below 50 percent, Apple recommends having the battery replaced.

If your battery health is still above 80 percent but drain is severe and no app is the cause, a hardware component may be failing—the display, the processor, or the charging circuit. This requires a visit to an Apple Store or an authorized repair shop to diagnose. Do not attempt to replace the battery yourself unless you have experience with phone repair; the process requires opening the phone and disconnecting components that can be damaged.

Testing which fix actually works

After you make a change—turning off an app's location services, disabling background refresh, or lowering brightness—use your phone normally for a few hours and check the battery percentage. If it's draining noticeably slower, you've found the problem. If it's still draining fast, undo that change and try the next one.

Keep a note of which settings you've changed so you don't forget what you've already tested. Most people find the culprit within two or three changes. If you've turned off location services, background refresh, notifications, and Bluetooth and the drain is still severe, the problem is likely your battery's age or a hardware fault, and you should take your phone to Apple or an authorized repair shop.

Frequently Asked Questions

Can I close apps running in the background to save battery?

Closing apps by swiping them away in the app switcher does not save much battery. iOS is designed to pause apps automatically when you're not using them. Turning off background app refresh and location services is more effective than manually closing apps.

Does low power mode really help?

Yes. Low Power Mode reduces processor speed, disables background app refresh, and lowers screen brightness. Go to Settings, tap Battery, and toggle on Low Power Mode. It typically extends battery life by 1 to 3 hours, though your phone will feel slightly slower.

Why does my battery drain faster in cold weather?

Lithium batteries work less efficiently when cold. Your iPhone may show a lower battery percentage in cold weather, but the battery itself is not damaged. Once it warms up, the percentage will return to normal. Avoid leaving your phone in freezing temperatures for long periods.

Should I let my battery drain completely before charging?

No. Modern iPhones use lithium batteries that last longer if you charge them frequently and avoid letting them drop to zero. Charge your phone whenever it's convenient, and don't worry about "conditioning" the battery.

What if I've tried everything and the battery still drains fast?

If battery health is below 80 percent, the battery needs replacement. If health is above 80 percent and no app is using excessive power, a hardware component may be failing. Contact Apple Support or visit an Apple Store to have the phone diagnosed.