The most common reasons your iPhone battery empties quickly

Fast battery drain usually comes from one of three sources: an app running in the background and using power constantly, your screen brightness set too high, or a feature like location services or Bluetooth left on when you don't need it. Less often, the battery itself is wearing out — iPhones lose battery capacity over time, and once a battery reaches about 80 percent of its original capacity, you'll notice the phone dies faster than it used to.

The fastest way to find out which one is happening is to check your battery usage report. This built-in tool shows you exactly which apps have used the most power in the last 24 hours or the last 10 days. If one app is using far more than the others, that's your culprit. If the usage is spread evenly across many apps, or if you see "System Services" at the top of the list, the problem is usually a setting or the battery itself.

Key Takeaways

  • Check your battery usage report in Settings > Battery to see which apps are draining power fastest.
  • High screen brightness, location services running constantly, and background app refresh are the three most common causes of fast drain.
  • If one app is using most of your battery, force-close it or uninstall it; if usage is spread across many apps, adjust your settings instead.
  • A battery that has lost more than 20 percent of its original capacity will drain noticeably faster, and replacing it is the only fix.

How to check which apps are using your battery

Open Settings, then tap Battery. You'll see a list of apps ranked by how much power they've used. Tap "Last 24 Hours" at the top to see recent drain, or "Last 10 Days" to spot patterns over time. The percentage next to each app shows how much of your total battery use that app accounts for — not how much battery it has left.

If one app is using 30 percent or more of your battery while you barely use it, that app has a problem. Common offenders are Maps (if location is on), Facebook, YouTube, and games. If you see "System Services" or "Screen" at the top, the problem is a setting, not an app. System Services drain usually means location services, Bluetooth, or background activity is running constantly. Screen drain means your brightness is too high or you're using your phone heavily.

Turn off the features that drain battery fastest

Location services is the single biggest battery drain after screen brightness. Go to Settings > Privacy > Location Services and turn it off entirely, or scroll down and turn it off for individual apps that don't need it — Maps needs it, but Instagram doesn't. Many people leave location on by habit and never use it.

Background App Refresh lets apps update in the background even when you're not using them. Go to Settings > General > Background App Refresh and turn it off, or turn it off for specific apps. You won't get notifications as fast, but your battery will last noticeably longer. Bluetooth and Wi-Fi also drain battery when left on, so turn them off when you leave home or the office.

Screen brightness is the second-biggest drain after location. Go to Settings > Display & Brightness and turn on Auto-Brightness, which adjusts brightness based on the light around you. If you keep brightness at 100 percent indoors, you're wasting power. Lowering it to 40 or 50 percent indoors makes a real difference.

What to do if a single app is the problem

If your battery report shows one app using far more power than others, try closing it completely first. Swipe up from the bottom of the screen (or swipe down from the top right on newer iPhones) to open the app switcher, find the app, and swipe it up to close it. Then check your battery usage again after a few hours of normal use.

If closing it doesn't help, the app itself may have a bug or be misconfigured. Go to Settings > Apps (or the app's own settings) and look for options like "Location," "Microphone," or "Camera" — turn off any permissions the app doesn't actually need. If the app still drains battery heavily, uninstall it and use the web version instead, or look for a lighter alternative. For example, if Facebook is draining your battery, try using Facebook in Safari instead of the app.

Check your battery health to see if it's wearing out

iPhones have a battery health report that tells you what percentage of the battery's original capacity remains. Go to Settings > Battery > Battery Health & Charging. If the number is 80 percent or higher, your battery is fine. If it's between 70 and 80 percent, you'll notice faster drain than when the phone was new, but it's still usable. If it's below 70 percent, the battery is significantly worn and replacing it will solve most of your drain problems.

Apple and most phone repair shops can replace your battery. Apple charges between $69 and $99 depending on your iPhone model. Third-party repair shops often charge $40 to $60. If your phone is still under warranty or you have AppleCare+, the replacement may be covered. Battery health naturally declines over time — after about two to three years of daily use, most iPhone batteries drop to 80 percent capacity.

Less common causes of fast battery drain

If your battery report shows no single app using excessive power, and battery health is above 80 percent, the problem may be a setting you've overlooked. Check whether you have notifications turned on for many apps — each notification wakes your screen and uses power. Go to Settings > Notifications and turn off notifications for apps you don't need alerts from.

iCloud syncing can also drain battery if you're syncing large photo libraries or documents constantly. Go to Settings > [Your Name] > iCloud and turn off syncing for anything you don't need synced in real time. If you use your phone in a place with poor cellular signal, your phone works harder to stay connected and drains faster — this is temporary and will stop once you're in an area with better signal.

Extreme heat or cold also drains battery faster temporarily. If your phone is hot, let it cool down before using it heavily. If you've recently updated iOS, your phone may be indexing files in the background for a few hours after the update — battery drain will return to normal once that finishes.

Frequently Asked Questions

Is it normal for iPhone battery to drain 1 percent per minute?

No. Normal drain is about 1 percent every 5 to 10 minutes during active use, or 1 to 2 percent per hour when the phone is idle. If you're losing 1 percent per minute while doing nothing, check your battery report when ready — an app is likely running in the background or your battery is severely worn.

Does closing apps in the app switcher save battery?

Closing apps does almost nothing to save battery. iOS pauses apps automatically when you're not using them. The only time closing an app helps is if it's actively running and draining power, which you'll see in your battery report. Closing apps you don't use won't fix the problem.

Will turning on Low Power Mode fix fast battery drain?

Low Power Mode slows your phone down and limits background activity to stretch your battery further, but it doesn't fix the underlying cause of drain. If an app is broken or your battery is worn, Low Power Mode just delays the problem. Use it as a temporary fix while you investigate what's actually draining power.

Can I replace my iPhone battery myself?

Apple doesn't sell batteries to consumers, and opening your iPhone yourself will damage the water seal and void any warranty. Use Apple or an authorized repair shop. Some third-party shops do good work, but quality varies — read reviews before choosing one.

Why does my battery drain faster in winter?

Cold temperatures slow down the chemical reactions inside your battery, making it deliver power less efficiently. Your phone may also work harder to stay warm. Once your phone warms up, battery performance returns to normal. This is temporary and doesn't mean your battery is damaged.