The fastest way to add hours to your iPhone battery

Turn on Low Power Mode. This single setting cuts background activity, reduces performance slightly, and extends battery life by several hours on most iPhones. You'll find it in Settings > Battery > Low Power Mode, and you can toggle it on manually or set it to turn on automatically when your battery drops to 20 percent.

After Low Power Mode, the next biggest drain is screen brightness. Reduce it to 40 percent or lower, or turn on Auto-Brightness in Settings > Accessibility > Display & Text Size so your phone adjusts to the light around you. A bright screen running all day uses more power than almost any app or background process.

The third major battery consumer is location services. Apps track your location constantly in the background, even when you're not using them. Go to Settings > Privacy & Security > Location Services and turn it off entirely, or switch individual apps to "While Using" instead of "Always." Maps, weather, and fitness apps need location; most others don't.

Key Takeaways

  • Low Power Mode is the single fastest way to extend battery life and can add several hours to a full charge.
  • Screen brightness accounts for more battery drain than most apps, so reducing it to 40 percent or lower makes a measurable difference.
  • Location services running in the background drain battery constantly; switching apps from "Always" to "While Using" stops most of that drain.
  • Background app refresh, push notifications, and visual effects all consume battery; turning them off for apps you don't need them on saves hours per day.
  • Older batteries lose capacity over time, and you can check yours in Settings > Battery Health & Device Management to see if replacement would help.

Turn off background app refresh for apps that don't need it

Background app refresh lets apps update their content even when you're not looking at them. Mail, Messages, and weather apps benefit from it. Most games, social media apps, and news readers do not. Go to Settings > General > Background App Refresh, turn off the master toggle, then turn it back on only for the apps that actually need it.

This setting alone can add 1 to 2 hours to your battery life, depending on how many apps you have installed. The more apps running in the background, the more your phone's processor and radio stay active, and the faster the battery drains.

Disable push notifications and visual effects

Every notification that arrives on your screen requires your phone to light up, vibrate, or play a sound. Each one uses power. Go to Settings > Notifications and turn off notifications for apps you don't need alerts from. You can still check those apps manually when you want to.

Visual effects like parallax (the way your home screen shifts when you tilt your phone) and animated wallpapers also drain battery. Turn off parallax in Settings > Accessibility > Display & Text Size > Reduce Motion. Use a static wallpaper instead of a live one. These changes are small individually but add up across a day of use.

Manage location services for individual apps

Some apps ask for location permission and then use it constantly, even when you're not actively using the app. Navigation apps need it. Social media apps usually don't. Open Settings > Privacy & Security > Location Services, scroll through the list, and change apps from "Always" to "While Using" or "Never."

Pay special attention to apps you rarely open. If you haven't used an app in weeks, it doesn't need location access. Turning off location for even three or four apps can add 30 minutes to 1 hour of battery life per day.

Keep your iPhone cool and avoid extreme temperatures

Batteries drain faster when they're hot. If your phone gets warm during use, close apps you're not using, reduce screen brightness, and move to a cooler spot. Avoid leaving your phone in direct sunlight or in a hot car.

Extreme cold also hurts battery performance temporarily. If your phone is cold, let it warm up to room temperature before using it heavily. Neither heat nor cold permanently damages the battery in a single session, but repeated exposure over months does reduce battery capacity.

Check your battery health and consider replacement

iPhones older than two years often have batteries that hold less charge than they did new. You can see your battery's health in Settings > Battery > Battery Health & Device Management. If the maximum capacity is below 80 percent, your battery is degrading. Below 50 percent, Apple will throttle your phone's performance to protect the battery.

If your battery health is low and you've tried the settings above, replacement is the most effective fix. Apple charges between $69 and $99 for battery replacement depending on your model. Some third-party repair shops charge less, but Apple's warranty covers the replacement for a year.

Disable 5G and use Wi-Fi when possible

5G uses more power than 4G LTE. If you're in an area with 5G but don't need the speed, go to Settings > Cellular > Cellular Data Options > Voice & Data and switch to LTE. You'll see slightly slower speeds but noticeably longer battery life.

Wi-Fi uses less power than cellular data for the same amount of downloading. When you're at home or at work, connect to Wi-Fi instead of using cellular data. Your phone will also stop searching for cellular signal as aggressively, which saves additional battery.

Frequently Asked Questions

Does closing apps in the background actually save battery?

No. Closing apps manually does almost nothing because iOS suspends apps automatically when you're not using them. The only exception is an app that's actively running in the background, which you'll see in Settings > General > Background App Refresh. Turning off background refresh for specific apps saves battery; closing them manually does not.

Will turning off Bluetooth and Wi-Fi when I'm not using them save battery?

Turning off Wi-Fi saves a small amount of battery because your phone stops scanning for networks. Turning off Bluetooth saves even less unless you have a device actively connected. Low Power Mode handles both automatically, so if you're using that, you don't need to toggle them manually.

Is it bad to leave my iPhone plugged in overnight?

No. Modern iPhones stop charging at 100 percent and hold the charge without draining the battery further. Leaving it plugged in overnight won't damage the battery. However, keeping your phone at 100 percent constantly over months does degrade the battery slightly. If you charge every night, you'll see normal battery wear over two to three years.

Does using dark mode save battery on all iPhones?

Dark mode saves battery only on iPhones with OLED screens (iPhone 12 and newer). OLED pixels produce their own light, so black pixels use almost no power. On older iPhones with LCD screens, dark mode makes almost no difference because the backlight stays on regardless of what's displayed.

What's the difference between Low Power Mode and Battery Saver mode?

Low Power Mode is Apple's official battery-saving feature, available on all iPhones. There is no separate "Battery Saver" mode. Low Power Mode reduces performance, limits background activity, and extends battery life by several hours. You can turn it on manually or set it to set up automatically at 20 percent battery.