The fastest way to improve iPhone battery life is to turn off features you are not actively using
Your iPhone drains battery fastest when it is searching for signals, refreshing apps in the background, and keeping your screen at full brightness. You can extend battery life by hours each day without replacing the battery or buying a new phone — by disabling the features that consume the most power and adjusting how your phone refreshes content.
The single most effective step is turning on Low Power Mode, which reduces performance slightly but can add 1 to 3 hours to a full charge. After that, the next biggest gains come from lowering screen brightness, turning off location services for apps that do not need it, and preventing apps from refreshing in the background.
Key Takeaways
- Low Power Mode reduces background activity and performance to extend battery life by 1 to 3 hours, and you can turn it on at any charge level, not just when the battery is low.
- Screen brightness is the single largest drain on battery power, so lowering it or enabling Auto-Brightness saves more power than any other setting change.
- Background App Refresh allows apps to update content even when you are not using them; turning it off for apps you do not need to check constantly saves significant battery.
- Location Services, Bluetooth, and Wi-Fi searching drain battery when enabled; disabling them for specific apps or turning them off entirely when you are not moving saves power.
- Older iPhones with degraded batteries show lower maximum capacity in Settings > Battery Health & Device Management, and a replacement battery restores full capacity.
Turn on Low Power Mode and understand what it changes
Low Power Mode is the fastest single adjustment you can make. Go to Settings > Battery, then toggle on Low Power Mode. Your phone will when ready reduce CPU speed, limit background activity, and disable some visual effects. The trade-off is small: apps open slightly slower, and some features like iCloud sync pause until you turn the mode off.
You can turn on Low Power Mode at any battery percentage — you do not have to wait until your battery is critically low. Many people leave it on all day and only turn it off when they need full performance for a specific task. On most iPhones, Low Power Mode alone adds 1 to 3 hours to your battery life.
Lower your screen brightness or enable Auto-Brightness
Your screen is the largest power consumer on your iPhone. Lowering brightness to 30 to 40 percent for indoor use saves more battery than any other single change except Low Power Mode. Swipe down from the top-right corner of your screen to open Control Center, then drag the brightness slider down.
For a permanent solution, enable Auto-Brightness so your phone adjusts brightness based on ambient light. Go to Settings > Accessibility > Display & Text Size, then toggle on Auto-Brightness. Your phone will dim indoors and brighten in sunlight automatically, which reduces the power drain from keeping the screen at maximum brightness all day.
Turn off Background App Refresh for apps you do not need to monitor
Background App Refresh lets apps update their content even when you are not looking at them — so your email, news, and weather apps are fresh when you open them. But this constant refreshing drains battery. Go to Settings > General > Background App Refresh and toggle off the feature entirely, or scroll down and turn it off for individual apps.
Keep Background App Refresh on for apps you check frequently, like Messages or Mail. Turn it off for apps like games, news readers, or social media that you open on your own schedule. This selective approach keeps your most important apps current while saving battery on the rest.
Disable Location Services for apps that do not need your location
Location Services uses GPS, Bluetooth, and Wi-Fi signals to pinpoint your location, which is a significant battery drain. Go to Settings > Privacy & Security > Location Services. You will see a list of every app that has requested location access. For each app, tap it and choose Never, While Using, or Always.
Choose "While Using" for navigation apps like Maps or Waze, since they need your location only while you are actively navigating. Choose "Never" for apps that do not need location at all — most games, messaging apps, and productivity tools work fine without it. Turning off "Always" for apps that request it saves battery by preventing constant background location tracking.
Turn off Bluetooth and Wi-Fi when you are not using them
Bluetooth and Wi-Fi radios search for signals constantly, even when you are not connected to anything. If you are not using wireless headphones, a smartwatch, or a car system, turn off Bluetooth in Control Center. Similarly, if you are away from home or the office, turn off Wi-Fi so your phone stops searching for networks.
You can also reduce the power drain from Wi-Fi searching by going to Settings > Wi-Fi and toggling off "Ask to Join Networks." This prevents your phone from constantly scanning for available networks when Wi-Fi is off. For Bluetooth, go to Settings > Bluetooth and toggle it off entirely when you are not using wireless devices.
Check your battery health and replace the battery if capacity has degraded
After 2 to 3 years of daily use, iPhone batteries naturally lose capacity. Go to Settings > Battery > Battery Health & Device Management to see your battery's maximum capacity. If it shows below 80 percent, your battery is degraded and will not hold a full charge as long as it once did.
If capacity is below 80 percent and you want the battery life you had when the phone was new, you can have Apple replace the battery. The cost varies by iPhone model and your location, but typically ranges from $50 to $100. Apple will run a diagnostic first to confirm the battery is the issue. If your phone is still under warranty or covered by AppleCare+, the replacement may be free.
Disable visual effects and animations to reduce processor load
Motion effects and animations look smooth but require your processor to work harder. Go to Settings > Accessibility > Display & Text Size and toggle on Reduce Motion. This disables parallax effects (where the background moves when you tilt your phone) and reduces animation speed throughout the system.
You can also reduce transparency effects by toggling on Reduce Transparency in the same menu. These changes are subtle visually but noticeably reduce the work your processor does, which saves battery. Combined with Low Power Mode and brightness reduction, disabling motion effects can add another 30 minutes to 1 hour of battery life.
Frequently Asked Questions
Does closing apps in the background actually save battery?
No. Closing apps manually does not save battery because iOS automatically suspends apps you are not using. Manually closing them forces your phone to reload them from scratch the next time you open them, which actually uses more power. Instead, turn off Background App Refresh for specific apps you do not need to monitor.
Will turning off 5G save significant battery?
Yes, but the savings depend on your location and usage. If you are in an area with strong 5G coverage and use data-heavy apps, turning off 5G can add 30 minutes to 1 hour of battery life. Go to Settings > Cellular > Cellular Data Options > Voice & Data and select LTE instead of 5G. The trade-off is slower read speeds.
Is it bad to leave my iPhone on Low Power Mode all the time?
No. Low Power Mode is safe to use continuously. It reduces performance slightly, but most people do not notice the difference in everyday use. The only reason to turn it off is if you need full speed for gaming, video editing, or other demanding tasks.
Why does my battery drain faster after a software update?
After an update, your phone indexes files and processes background tasks for 24 to 48 hours. During this time, battery drain is higher than normal. If drain remains high after two days, check Settings > Battery to see which apps are using the most power, and turn off Background App Refresh for the heavy users.
Can I improve battery life by disabling notifications?
Slightly. Notifications wake your screen and trigger processing, so turning off notifications for apps you do not need to monitor saves a small amount of battery. Go to Settings > Notifications and review which apps are allowed to send notifications. Disable them for apps you check manually.