The fastest ways to extend your iPhone battery
Most iPhones lose noticeable battery capacity within two to three years of regular use. You cannot reverse that wear, but you can slow it down and reclaim hours of daily use by changing how your phone manages power right now. The single biggest drain on any iPhone is the screen brightness and how often it stays on. Lowering brightness to 30 to 40 percent and enabling Auto-Brightness cuts battery use by 15 to 25 percent on a typical day. After that, turning off location services for apps that do not need it, disabling background app refresh, and switching to Low Power Mode when your battery reaches 20 percent will add another 10 to 15 percent to your remaining charge.
These changes work on any iPhone model running iOS 15 or later. You do not need to buy a new battery or replace hardware — the settings are built in and take less than ten minutes to configure.
Key Takeaways
- Lowering screen brightness to 30 to 40 percent and enabling Auto-Brightness is the single most effective change, cutting battery drain by 15 to 25 percent daily.
- Location services, background app refresh, and push notifications drain battery even when you are not using your phone — turning them off for unnecessary apps recovers 10 to 15 percent of charge.
- Low Power Mode reduces processor speed and network activity to extend battery life by several hours when you reach 20 percent charge.
- Keeping your iPhone between 20 and 80 percent charge during storage and avoiding heat slows the chemical aging of the battery itself.
Adjust screen brightness and enable Auto-Brightness
Your iPhone screen uses more power than any other component. Manual brightness at 100 percent drains the battery twice as fast as brightness at 40 percent. The fastest fix is to lower brightness to between 30 and 40 percent for indoor use and let Auto-Brightness handle the rest.
To set this up, open Settings, tap Display & Brightness, and drag the brightness slider to your preferred level. Then toggle on Auto-Brightness. Your phone will now dim automatically in low light and brighten in sunlight, matching what your eyes need without wasting power on excess brightness.
If you use your phone outdoors often, keep Auto-Brightness on and set the manual slider to 50 percent instead. Auto-Brightness will still dim indoors but will have more headroom to brighten in direct sun.
Turn off location services for apps that do not need it
Location services use your phone's GPS, cellular, and Wi-Fi radios constantly, even when you are not actively using an app. Many apps request location permission but do not need it every time they run. Turning off location for those apps recovers 5 to 10 percent of daily battery use.
Go to Settings, tap Privacy & Security, then Location Services. You will see a list of every app that has requested location access. For each app, tap it and choose "Never" or "While Using". Choose "While Using" only for apps that genuinely need your location in real time — maps, ride-sharing, fitness tracking. For everything else — social media, news, weather — choose "Never". Weather can still show your local forecast if you set it manually once.
Do not turn off Location Services entirely unless you never use maps or navigation. Turning it off per-app is faster and gives you control.
Disable background app refresh for apps you do not monitor
Background app refresh lets apps update their content even when you are not looking at them. This is useful for mail, messages, and news apps you check regularly. It is wasteful for apps you open once a week or less. Disabling it for those apps saves 5 to 8 percent of battery daily.
Open Settings, tap General, then Background App Refresh. You will see a toggle at the top to turn it off entirely, and a list of individual apps below. Keep it on for mail, messages, calendar, and any app you check multiple times a day. Toggle it off for everything else — games, shopping apps, utilities you use occasionally.
Apps will still work normally when you open them. They just will not update in the background while your phone is locked.
Enable Low Power Mode at 20 percent charge
Low Power Mode reduces processor speed, disables some visual effects, and limits network activity to stretch your remaining battery. It typically adds two to four hours of use when you turn it on at 20 percent charge. You can also turn it on manually at any battery level if you know you will not have access to a charger soon.
To enable it automatically, go to Settings, tap Battery, then Battery Health & Management. Toggle on Optimized Battery Charging and Low Power Mode. Your phone will now switch to Low Power Mode automatically when your battery reaches 20 percent. You can also swipe down from the top-right corner of your screen, find Battery in Control Center, and tap Low Power Mode to turn it on manually whenever you want.
Low Power Mode does slow down some tasks — apps may take a second or two longer to open, and video playback may buffer slightly. The trade-off is worth it if you need your phone to last until you can charge it.
Turn off push notifications for apps you do not need alerts from
Every notification wakes your screen and uses power to display it, even if you dismiss it when ready. Apps that send frequent notifications — social media, games, shopping apps — drain battery faster than apps that send one or two per day. Turning off notifications for apps you do not actively monitor saves 3 to 5 percent of daily battery.
Open Settings, tap Notifications, and scroll through the list. For each app, tap it and toggle off Allow Notifications. You can still open the app manually to check for messages — you just will not get a constant stream of alerts. Keep notifications on for mail, messages, phone calls, and calendar reminders.
Keep your battery between 20 and 80 percent when storing your phone
Lithium batteries age faster when they are fully charged or fully drained. If you store your iPhone for more than a few weeks, charge it to about 50 percent, then turn it off. If you use it daily, try to keep it between 20 and 80 percent charge during the day — charge it overnight but do not leave it plugged in after it reaches 100 percent.
Your iPhone has built-in optimized charging that slows charging to 80 percent after you reach it, then finishes the last 20 percent closer to when you wake up. This is turned on by default in Settings under Battery. You can also manually unplug your phone at 80 percent if you prefer.
Heat accelerates battery aging more than anything else. Avoid leaving your phone in direct sunlight, in a hot car, or near a heat source. If your phone gets warm during normal use, close background apps and let it cool down before using it again.
Disable visual effects and animations
Parallax, motion blur, and animated transitions use processor power and drain battery. Turning them off saves 2 to 4 percent of daily battery use and makes your phone feel snappier.
Go to Settings, tap Accessibility, then Display & Text Size. Toggle on Reduce Motion. This disables parallax on your home screen and reduces animation when you open and close apps. You can also go to Settings, tap Accessibility, then Motion, and toggle on Reduce Motion there as well — both settings control the same feature.
Your phone will still work exactly the same way. Apps will open when ready instead of sliding in, and your home screen will not tilt when you move your phone.
Frequently Asked Questions
Does Low Power Mode slow down my iPhone?
Yes, but only slightly. Your processor runs at a lower speed, so apps may take a second or two longer to open and some tasks like video editing will feel slower. For everyday use — texting, email, web browsing — the difference is barely noticeable. The trade-off is worth it if you need your battery to last several more hours.
Will turning off background app refresh break my mail or messages?
No. Mail and messages will still arrive and notify you normally. Background app refresh only controls whether the app updates its content when you are not looking at it. Turn it off for apps you do not check regularly, and keep it on for mail, messages, and calendar.
Can I replace my iPhone battery myself?
Apple and most phone repair shops can replace your battery for between 50 and 100 dollars, depending on your iPhone model. If your battery health has dropped below 80 percent and you use your phone heavily, replacement is often worth the cost. You can check your battery health in Settings under Battery, then Battery Health & Management.
Does charging my phone overnight damage the battery?
Modern iPhones have optimized charging that stops charging at 80 percent, then finishes the last 20 percent closer to when you wake up. This protects your battery from sitting at 100 percent charge for hours. Overnight charging is safe and will not damage your battery.
Why is my battery draining so fast all of a sudden?
A sudden drop in battery life usually means a single app is using too much power. Go to Settings, tap Battery, and look at Battery Usage by App. If one app is using more than 10 percent of your battery, check its background app refresh and location settings. If the problem persists, restart your phone or uninstall the app.