The fastest ways to extend your iPhone battery between charges

Your iPhone battery drains fastest when the screen is on at full brightness, when apps run in the background, and when your phone searches for a weak cellular signal. You can add hours to a single charge by lowering screen brightness, closing unused apps, and turning off location services for apps that do not need it. The single biggest change most people see comes from enabling Low Power Mode, which reduces performance slightly but can stretch a full battery to nearly two days of light use.

The changes that work best depend on how you use your phone. If you spend most of your day on calls or video, screen brightness and background app refresh matter most. If you use your phone for email and messaging with occasional browsing, location services and cellular signal strength become the bigger drain. Start by checking which apps consume the most battery, then disable the features those apps do not actually need.

Key Takeaways

  • Low Power Mode is the single fastest way to extend battery life and can be turned on in Settings > Battery or Control Center without losing core phone functions.
  • Screen brightness accounts for roughly 20 to 30 percent of battery drain on most iPhones, so lowering it or enabling Auto-Brightness saves hours per charge.
  • Background App Refresh allows apps to update even when you are not using them; turning it off for apps you do not need to check constantly saves significant battery.
  • Location services drain battery fastest when apps request your precise location constantly; turning off location for apps like social media and weather saves battery without affecting calls or texts.
  • Checking Settings > Battery to see which apps consumed the most power in the last 24 hours tells you exactly which apps to restrict first.

How Low Power Mode works and when to turn it on

Low Power Mode reduces CPU speed, limits background activity, and disables some visual effects to cut battery drain by roughly 20 to 40 percent depending on your usage. You can turn it on in Settings > Battery > Low Power Mode, or add it to Control Center so you can toggle it with one tap. When Low Power Mode is on, your phone will still receive calls and texts, run navigation, and play music or video—it just processes these tasks slightly slower and stops apps from refreshing in the background.

Most people notice Low Power Mode only when they are downloading large files or playing graphics-heavy games, where the slower processor becomes visible. For everyday use—email, messaging, browsing, maps—the slowdown is not noticeable. You can leave Low Power Mode on all day if you want, or turn it on only when your battery drops below 20 percent. Your iPhone will ask you to enable it automatically at 20 percent, but you can turn it on earlier if you know you will not have a charger for several hours.

Lowering screen brightness and using Auto-Brightness

Your screen is the single largest battery drain on an iPhone, using between 20 and 40 percent of your battery depending on brightness level and how long you use it. Lowering brightness from maximum to 40 percent can add two to four hours to a full charge. You can adjust brightness by swiping down from the top-right corner to open Control Center, then dragging the brightness slider down. For most indoor use, 30 to 50 percent brightness is comfortable and saves significant battery.

Auto-Brightness adjusts your screen automatically based on the light around you, so you do not have to manually change it throughout the day. Turn it on in Settings > Accessibility > Display & Text Size > Auto-Brightness. When Auto-Brightness is on, your phone uses the ambient light sensor to dim the screen in dark rooms and brighten it in sunlight, which keeps battery drain lower than manual brightness ever could. This is one of the easiest changes to make and one of the most effective.

Turning off background app refresh for apps you do not need

Background App Refresh allows apps to check for new messages, updates, and notifications even when you are not actively using them. This is useful for email, messaging, and news apps, but drains battery when enabled for apps like social media, games, or shopping apps that do not need to update constantly. You can see which apps have Background App Refresh turned on in Settings > General > Background App Refresh, and turn it off for individual apps by tapping the toggle next to their name.

Start by turning off Background App Refresh for apps you check only a few times a day—shopping apps, social media, fitness apps, and games are good candidates. Keep it on for email, messaging, and weather, since those apps benefit from staying current. If you turn off Background App Refresh for an app and realize you miss the notifications, you can turn it back on in the same menu. Most people save one to two hours of battery life by disabling it for five to ten apps.

Disabling location services for apps that do not need it

Location services use your phone's GPS, cellular data, and Wi-Fi to pinpoint your location, which is a significant battery drain. Many apps request location permission but do not actually need your precise location to work—social media apps, shopping apps, and news apps are common examples. You can see which apps have location permission in Settings > Privacy & Security > Location Services, and change each app's permission from "Always" to "While Using" or "Never."

Apps set to "Always" drain battery even when you are not using them, because they check your location in the background. Changing them to "While Using" means they can only see your location when the app is open on your screen. For most apps, "While Using" is enough, or you can turn location off entirely if you do not use that feature. Maps, weather, and Find My should stay on "Always" or "While Using" so they work properly, but social media and shopping apps rarely need location at all.

Checking which apps drain the most battery

Your iPhone tracks which apps used the most battery in the last 24 hours and the last 10 days. Open Settings > Battery, and you will see a list of apps ranked by battery consumption. The percentage next to each app shows how much of your total battery that app used. If an app you rarely use is in the top five, that is a sign to disable Background App Refresh for it, turn off its location permission, or uninstall it entirely.

Pay attention to apps that show high battery use but you do not remember opening—these are usually apps running in the background. For example, if a fitness app shows 15 percent battery use but you only opened it once, Background App Refresh is likely running constantly. Tap the app name to see whether it was on-screen or running in the background, then decide whether you need that behavior. Checking this list once a week helps you catch battery-draining apps before they become a problem.

Disabling visual effects and animations

Your iPhone uses animations and visual effects when you open apps, swipe between screens, and interact with notifications. These effects look polished but require your processor to work harder, which drains battery. You can disable most of them in Settings > Accessibility > Display & Text Size > Reduce Motion. When Reduce Motion is on, app transitions become when ready instead of animated, and notifications appear without sliding in from the edges.

Reduce Motion is most noticeable on older iPhones or when you have many apps open, but it saves battery on all models. The visual difference is subtle—your phone still works the same way, just without the extra animations. If you like the animations, you can leave this off, but if you are trying to squeeze every hour out of your battery, turning it on saves roughly 5 to 10 percent battery per charge.

Managing cellular signal and Wi-Fi

Your iPhone works harder to maintain a connection when the cellular signal is weak, which drains battery faster. If you are in an area with poor signal, your phone constantly searches for a stronger connection, using extra power. You can see your signal strength in the top-left corner of your screen—if you see only one or two bars, battery drain will be higher than normal. If you are staying in one place with weak signal, turning on Airplane Mode and then turning Wi-Fi back on lets you use Wi-Fi without the phone searching for cellular signal.

Wi-Fi uses less battery than cellular data, so connecting to Wi-Fi when available extends battery life. However, if your Wi-Fi signal is also weak, your phone will use more battery searching for a stronger connection. If you are moving between locations with weak signal, turning off Wi-Fi entirely and relying on cellular can actually save battery, because your phone stops searching for Wi-Fi networks. The key is matching your connection method to your situation—strong Wi-Fi is best, then strong cellular, then weak signal of either type.

Frequently Asked Questions

Does turning off Bluetooth save battery?

Bluetooth drains battery only when it is actively connected to a device like headphones or a car stereo. When Bluetooth is on but not connected, it uses very little power. If you never use Bluetooth, turning it off saves a small amount of battery—roughly 1 to 2 percent per charge. For most people, the convenience of leaving Bluetooth on outweighs the tiny battery savings.

Will my iPhone battery get worse over time?

Yes. iPhone batteries lose capacity with every charge cycle, and after about 500 full charge cycles (roughly one to two years of normal use), a battery typically holds about 80 percent of its original capacity. You can check your battery health in Settings > Battery > Battery Health & Charging. If your battery health drops below 80 percent and you notice your phone dying quickly, Apple can replace the battery for a fee, or you can use Low Power Mode more often to extend the charge.

Does closing apps in the app switcher save battery?

No. Closing apps by swiping them away in the app switcher does not save battery, because iOS automatically manages app memory and stops inactive apps from running. Closing apps actually uses more battery, because your phone has to reload them from scratch the next time you open them. The only exception is if an app is visibly draining battery in the background—in that case, closing it temporarily stops the drain, but the real fix is turning off Background App Refresh for that app.

Is it bad to use Low Power Mode all the time?

No. Low Power Mode is designed to be safe for long-term use and does not damage your battery or phone. The only downside is slightly slower performance when downloading files or playing games. If you want your phone to last longer between charges and do not mind the minor slowdown, you can leave Low Power Mode on permanently. Many people turn it on at 50 percent battery and leave it on for the rest of the day.

Why does my battery drain faster in cold weather?

Cold temperatures reduce chemical reactions inside your battery, which temporarily lowers its capacity. Your iPhone may show a lower battery percentage or shut down unexpectedly in very cold weather, even though the battery is not actually damaged. When you warm the phone back up, the battery percentage returns to normal. If you use your phone in cold weather regularly, keeping it in an inside pocket or case helps maintain battery performance.