Disable automatic downloads and app updates

Downloading apps and updating them in the background uses a lot of power. Turn it off:

  1. Go to Settings > App Store
  2. Turn off Automatic Downloads of Apps
  3. Turn off Automatic Downloads of Apps Updates
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How to Turn on dark mode and turn brightness down

On devices with an OLED display (iPhone X, XS, XS Max, iPhone 11, and iPhone 12), Dark Mode can save quite a bit of battery life, so it's worth enabling: 1.

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13 iPhone Battery Saving Tips to Extend Battery Life

How to improve iPhone battery life with low power mode, background app refresh, location services, and more settings