The iPhone 8 might have a smaller 1821 mAh battery, but thanks to the powerful A11 Bionic chip, it’s surprisingly efficient. Even so, if you find your battery draining faster than expected — or just want to squeeze out every last bit of life between charges — there are easy ways to manage and extend your battery performance.
Here’s a complete guide to help you save battery life and fix common battery problems on your iPhone 8.
Use Low Power Mode
Low Power Mode is your best friend when your battery starts getting low. It reduces background activity and visual effects to stretch your battery life.
To turn on Low Power Mode:
- Go to Settings → Battery.
- Toggle Low Power Mode ON.
To add Low Power Mode to Control Center for quick access:
- Go to Settings → Control Center → Customize Controls.
- Add Low Power Mode.
- Now swipe up from the bottom of the screen and tap the Low Power Mode icon.
When enabled, you’ll see a yellow battery icon in the status bar. Just remember — some tasks like mail fetching and Siri might slow down while it’s on.
Optimize Your Display and Connectivity Settings
Bright screens and constant mobile data usage can kill your battery fast. Here’s how to fix that:
Lower Screen Brightness:
- Swipe up to open the Control Center.
- Drag the Brightness slider to the left.
Turn on Auto-Brightness:
- Go to Settings → Display & Brightness.
- Enable Auto-Brightness.
Use Wi-Fi Instead of Cellular Data:
- Go to Settings → Wi-Fi and connect to a network when possible.
- Wi-Fi uses less power compared to cellular networks.
Manage Battery Usage
Check which apps are draining your battery and take action.
To view battery usage:
- Go to Settings → Battery.
- Scroll down to see a breakdown of battery usage by app.
Apps that use a lot of background activity can be limited or disabled when you’re not using them.
Turn Off Background App Refresh
Apps running and updating in the background can eat up your battery.
To disable Background App Refresh:
- Go to Settings → General → Background App Refresh.
- Toggle it OFF.
If Mail shows heavy background activity, you can also adjust its fetch settings:
- Go to Settings → Mail → Accounts → Fetch New Data.
- Set it to Manually or choose a longer fetch interval.
Turn Off Location Services
Location Services constantly ping your location and drain battery life.
To manage Location Services:
- Go to Settings → Privacy → Location Services.
- Turn it OFF completely or limit it per app.
Apps that recently used your location will show an indicator — these are good ones to disable first if you want to save battery.
Disable Unused Connectivity Features
If you’re not actively using Wi-Fi, Bluetooth, or GPS, it’s better to turn them off.
To turn off Wi-Fi:
- Go to Settings → Wi-Fi and toggle it OFF.
To turn off Bluetooth:
- Go to Settings → Bluetooth and toggle it OFF.
To turn off GPS:
- Go to Settings → Privacy → Location Services and toggle it OFF.
Constantly searching for networks burns battery fast — disabling these when you don’t need them makes a big difference.
Other Helpful Tips
- Set your phone to sleep quickly by pressing the Power button when you’re done using it.
- Adjust app sync settings to fetch data less often.
- Turn off app notifications for apps that frequently wake your phone:
- Go to Settings → Notifications, tap the app, and toggle Allow Notifications OFF.
- Use Airplane Mode if you’re in a low-signal area to stop the phone from constantly searching for a better connection:
- Go to Settings → Airplane Mode or toggle it quickly from Control Center.
Just remember that Airplane Mode disables all wireless communications, so you won’t be able to make calls or use data while it’s enabled.
do you recommend waiting to recharge until battery is almost 0% to save battery life; or is it ok to just keep in plugged into charger all night even when 100% charged?