What do do if Galaxy Note8 turns off on its own when battery is low

Is your Galaxy Note8 having a problem shutting down on its own when its battery reaches a certain point? This troubleshooting article will answer that problem. Find out the things that you can do about this trouble below.

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Problem: Galaxy Note8 turns off on its own when battery is low

Hi there. I have read your article but wanted to know if you could help me with my issue. I have a note 8 uk version. Bought 02.2018 Recently last couple of months when it gets to 20% the phone switches off. Needing charge in the past it has gone down to 1%. The phone is fully updated last checked 08.01.19 for any updates and none. I have turned off all permissions for play services apart from storage. Any help appreciated. Looking forward to your reply Thank you.

Solution: There’s a number of possible reasons for this problem. Follow our suggestions below to fix it.

Clear cache partition

Android uses a system cache, which is stored in the cache partition, to load apps quickly. Sometimes, this cache gets corrupted during and after an update, or for some other reasons. While this may sound harmless, a corrupted cache can eventually cause performance issues as well as a bunch of other problems. To ensure that your phone’s system cache is fresh, you can wipe the cache partition. This will force the phone to delete the current cache and replace it with a new one over time.

To wipe the cache partition on your Note8:

  1. Turn off the device.
  2. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  3. When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  4. Press the Volume down key several times to highlight ‘wipe cache partition’.
  5. Press Power button to select.
  6. Press the Volume down key until ‘yes’ is highlighted and press the Power button.
  7. When the wipe cache partition is complete, “Reboot system now” is highlighted.
  8. Press the Power key to restart the device.

Calibrate Android and battery

Sometimes, Android may lose track of the actual battery levels and cause premature shut downs. In case this is the cause of the problem, you can fix it by doing a calibration. To recalibrate the operating system so that it gets accurate battery level readings, do the following:

  1. Drain the battery completely. This means using your device until it powers down by its own and the battery level reads 0%.
  2. Charge the phone until it reaches 100%. Be sure to use original charging equipment for your device and let it charge up completely. Do not unplug your device for at least two more hours and also don’t use it while charging.
  3. After the elapsed time, unplug your device.
  4. Restart the device.
  5. Use your phone until it completely runs out of power again.
  6. Repeat steps 1-5.

Observe on Safe Mode

Sometimes, an app may interfere with Android and cause problems to other apps. To check if this is the reason why your Note8 turns off when battery is low, restart the device to safe mode. All downloaded apps will be suspended on this mode so if there’s no problem at all, that means that one of the apps is behind your issue.

To boot your device to safe mode:

  1. Turn the device off.
  2. Press and hold the Power key past the model name screen.
  3. When “SAMSUNG” appears on the screen, release the Power key.
  4. Immediately after releasing the Power key, press and hold the Volume down key.
  5. Continue to hold the Volume down key until the device finishes restarting.
  6. Safe mode will display in the bottom left corner of the screen.
  7. Release the Volume down key when you see Safe Mode.
  8. Observe the phone while it’s on safe mode for about 24 hours.

If the battery appears to work properly on safe mode but not on normal mode, that means a third party app is causing it. To identify which of your apps is causing the trouble, you should boot the phone back to safe mode and follow these steps:

  1. Boot to safe mode.
  2. Check for the problem.
  3. Once you’ve confirmed that a third party app is to blame, you can start uninstalling apps individually. We suggest that you begin with the most recent ones you added.
  4. After you uninstall an app, restart the phone to normal mode and check for the problem.
  5. If your Note8 is still problematic, repeat steps 1-4.

Reset app preferences

If there’s no change and the problem remains, the next step for you is to ensure that all default apps on the device are enabled. If an important system app has been disabled by mistake, it may cause other apps or functionalities to fail. To reset app preferences:

  1. Open Settings app.
  2. Tap Apps.
  3. Tap on More settings at the upper right (three-dot icon).
  4. Select Reset app preferences.
  5. Restart your Galaxy Note8 and check for the problem.

Factory reset

This is a necessary troubleshooting in this situation. This ensures that you return all software settings to their defaults. Follow the steps below to wipe the phone:

  1. Remove all Google accounts from the device
  2. Create a backup of your data.
  3. Turn off the device.
  4. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  5. When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  6. Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  7. Press Power button to select.
  8. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  9. Press Power button to select and start the master reset.
  10. When the master reset is complete, ‘Reboot system now’ is highlighted.
  11. Press the Power key to restart the device.

Get professional help

If the problem won’t go away after a factory reset, you can assume that there’s a hardware issue that causes the system to power off on its own. It may be a battery issue or a glitch on your device’s power management function. Make sure to let a Samsung technician check the device.


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