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Learn how to save battery life on the Samsung Galaxy S21 5G.


Battery saving mode

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap Settings > Battery and device care > Battery.
  3. Tap Power saving mode slider to turn on / off then select from the following:
    • Turn off Always On Display
    • Limit CPU speed to 70%
    • Decrease brightness by 10%
    • Limit apps and Home screen
  4. Tap Background usage limits slider to turn on / off then select from the following:
    • Put unused apps to sleep
    • Sleeping apps
    • Deep sleeping apps
    • Never sleeping apps
  5. Tap More battery settings then select from the following:
    • Adaptive battery
    • Enhanced processing
    • Show battery percentage
    • Show charging information
    • Fast charging
    • Super fast charging
    • Fast wireless charging


Tips to save battery life

  • Change application sync settings
  • Lower screen brightness and timeout duration
  • Turn on Airplane Mode if traveling to an area without mobile signal or Wi-Fi
  • Turn off background data
  • Turn off Wi-Fi, Bluetooth, GPS, and Smartphone Mobile Hotspot
  • Uninstall unused apps
  • Update to the latest software

Set device to sleep when unused

Press and then quickly release the Power key to set the screen to sleep mode.

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