The fastest way to extend battery life is to lower your screen brightness and enable Low Power Mode
Your iPhone screen uses more power than any other component. Lowering brightness to 40 percent or below cuts battery drain noticeably. The single most effective step is turning on Low Power Mode, which reduces performance slightly but extends battery life by hours. On any iPhone, swipe down from the top-right corner (or up from the bottom on older models), tap the battery icon, and toggle Low Power Mode on. Your phone will stay in this mode until you manually turn it off or the battery reaches 20 percent.
Low Power Mode limits background activity, reduces animation smoothness, and caps processor speed. You will notice the difference only in demanding tasks like gaming or video editing. For everyday use—email, messaging, browsing—the slowdown is imperceptible, and the battery gain is real.
Key Takeaways
- Low Power Mode is the single most effective setting change and can extend battery life by several hours with minimal impact on daily use.
- Disabling background app refresh for apps you do not use constantly prevents them from draining power when your phone is locked.
- Location services, Bluetooth, and Wi-Fi consume significant power; turn them off when you are not using them or switch to Wi-Fi over cellular data.
- Reducing screen brightness and enabling auto-brightness, combined with a shorter auto-lock time, cuts display power consumption substantially.
- Older batteries degrade over time; if your iPhone is more than three years old and drains quickly even with these changes, the battery itself may need replacement.
Turn off background app refresh for apps that do not need it
Apps running in the background consume battery even when you are not using them. Go to Settings > General > Background App Refresh and you will see a list of every app with permission to run in the background. Toggle off the ones you do not need constant updates from—social media, news apps, games, and streaming services are common culprits.
Keep background refresh on for apps you genuinely need: email, messaging, maps, and weather. Disabling it for ten to fifteen unused apps can add an hour or more to your battery life. You can also disable background refresh globally by toggling the master switch at the top, though this stops all apps from refreshing unless you open them manually.
Disable location services or limit them to when you are using an app
Constant GPS and location tracking drain your battery quickly. Go to Settings > Privacy & Security > Location Services and review which apps have permission. You will see three options for each app: Never, While Using, or Always.
Change apps to While Using unless they genuinely need your location all the time. Maps, ride-sharing apps, and fitness trackers need location while you are actively using them. Weather, social media, and most other apps do not need constant access. If an app does not need location at all, set it to Never. You can also disable location services entirely by toggling the master switch, though this breaks navigation and weather accuracy.
Turn off Bluetooth and Wi-Fi when you are not using them
Bluetooth and Wi-Fi radios search for connections constantly, even when you are not paired to anything. If you are not using wireless headphones, a smartwatch, or a car system, turn Bluetooth off. If you are away from home or the office, turn Wi-Fi off and let your phone use cellular data instead—searching for a Wi-Fi network uses more power than maintaining a cellular connection.
The quickest way is to swipe down from the top-right corner and tap the Bluetooth or Wi-Fi icon to toggle them. You can also go to Settings > Bluetooth or Settings > Wi-Fi to turn them off permanently. If you use Wi-Fi regularly at home, leave it on there but disable it when you leave.
Reduce screen brightness and enable auto-brightness
Your display is the largest power consumer on your phone. Lowering brightness to 30 to 40 percent for indoor use saves significant battery. Go to Settings > Display & Brightness and drag the brightness slider down. You can also enable Auto-Brightness, which adjusts brightness based on ambient light—this prevents you from running the screen at full brightness in dim rooms.
Set your auto-lock time to the shortest duration you can tolerate. Go to Settings > Display & Brightness > Auto-Lock and choose 1 or 2 minutes instead of 5. Your screen will turn off faster when you are not using it, cutting battery drain during the day when your phone spends time in your pocket or bag.
Disable visual effects and animations
Parallax effects, motion animations, and transparency effects look polished but cost battery power. Go to Settings > Accessibility > Display & Text Size and toggle on Reduce Motion. This disables parallax scrolling and app-opening animations. The phone will feel slightly less fluid, but the battery savings are measurable.
You can also disable Transparency Effects in the same menu. These visual flourishes do not affect functionality—your phone works exactly the same way, just with less animation overhead.
Check which apps are draining the most power
Go to Settings > Battery to see which apps have used the most power in the last 24 hours or 10 days. If a single app is consuming 20 percent or more of your battery, you have a few options: uninstall it, limit its background refresh, disable its location access, or use the web version instead of the app.
Some apps are straightforward power-hungry by design—video streaming, navigation, and fitness apps will always rank high if you use them frequently. But if an app you barely use is in the top three, that is a sign to restrict its permissions or remove it. You can also check Battery Health & Charging in the same menu to see your battery's maximum capacity. If it has dropped below 80 percent, your battery is aging and will drain faster no matter what settings you change.
When to replace your battery
If your iPhone is older than three years and your battery capacity has dropped below 80 percent, even with Low Power Mode and all these changes enabled, the battery itself is degraded. Lithium batteries lose capacity over time and charge cycles. You can check your battery health by going to Settings > Battery > Battery Health & Charging.
Apple and most phone repair shops offer battery replacement. Apple charges between $50 and $80 depending on your model; third-party repair shops often charge less but may void your warranty. A new battery will restore your phone to near-original battery life. If your phone is still under warranty or you have AppleCare+, battery replacement may be covered.
Frequently Asked Questions
Does turning off Wi-Fi and Bluetooth really save battery?
Yes, but the savings depend on how often your phone searches for connections. If you are in an area with weak Wi-Fi signals, your phone searches constantly and drains power faster. Turning Wi-Fi off in those situations saves noticeable battery. Bluetooth drains less power than Wi-Fi but still adds up if you are not actively using a paired device.
Will Low Power Mode slow down my phone noticeably?
You will see a slight slowdown in demanding tasks like gaming, video editing, or opening large files. For everyday use—texting, email, web browsing, social media—the difference is barely noticeable. Most people can leave Low Power Mode on all day without frustration.
Can I leave Low Power Mode on permanently?
Yes. Low Power Mode does not damage your phone or battery. If you prefer longer battery life over maximum performance, you can enable it and leave it on indefinitely. Your phone will perform normally for all routine tasks.
What is the difference between Low Power Mode and Battery Saver Mode?
Low Power Mode is Apple's official feature on iPhones. There is no separate "Battery Saver Mode"—Low Power Mode is the built-in power-saving tool. Some Android phones use the term "Battery Saver Mode," but iPhones use Low Power Mode.
Should I close apps running in the background to save battery?
Closing apps manually does not save battery. Modern iPhones manage background processes efficiently. Disabling background app refresh in settings is far more effective than swiping apps closed. Closing apps repeatedly actually uses more power because your phone has to reload them from scratch each time you open them.