How to fix your Samsung Galaxy Note 8 battery that drains quickly after an update (easy steps)

Aside from a faulty battery, software updates can also trigger a device to drain battery so quickly. Just like what has occurred to some users of the Galaxy Note 8 after installing the latest software version on their phone. Apparently, the main issue is attributed to a software error, therefore can potentially be resolved by end-users at home. And just in case you will need more inputs on how to deal with a post-update issue on your Galaxy Note 8 battery that’s draining so quickly, I have mapped out a few helpful workarounds and battery saving tips for your reference. Read on whenever you need help.

Before anything else though, if you have other issues with your device, then visit our troubleshooting page for we have already addressed several common problems with this phone. Odds are that there are already existing solutions to your problems so just take time finding issues that are similar with yours. If you can’t find one or if you need further assistance, feel free to contact us by completing our Android issues questionnaire. Please provide us with as much information as possible so that it would also be easier for us to troubleshoot the problem. Don’t worry as we offer this service for free, so all you have to do is give us sufficient information about the problem.

First workaround: Quit background apps then restart phone.

  1. Updates may cause any of your background apps to misbehave. To rule this out, quit all background apps or recently used apps on your Galaxy Note 8 with these steps:
  2. Open the Apps screen by swiping up or down from the center of the Home screen.
  3. Navigate to Settings-> Apps.
  4. Tap the Dropdown icon on the upper-right then select All apps.
  5. Locate the app then select Force Stop.
  6. Review the message then tap Force Stop again to confirm.

When you’re finished quitting running apps, reboot your phone or perform soft reset. Doing so will implement the new changes and refreshes the internal memory for smoother and better performance afterwards.

Second workaround: Wipe cache partition on your Galaxy Note 8.

Wiping cache partition is recommended when the device started to act weird after installing an update. The update might have caused some cached files or temporary data from within the system registry, which eventually led to massive power drain. To rule this out, wipe cache partition on your Note 8 with these steps:

  1. Power off your device.
  2. Press and hold the Volume Up, Home (Bixby), and Power buttons simultaneously for a few seconds.
  3. Release all buttons when the green Android logo shows up after the Installing system update label.
  4. Press the Volume Down key several times to scroll to and highlight wipe cache partition from the Android system recovery menu options.
  5. Press the Power button to confirm selection.
  6. Press the Volume Down button until Yes is highlighted then press the Power button to confirm.
  7. Allow your phone to finishing wiping the cache partition. You will know when it’s done if the Reboot system now is highlighted.
  8. By then, press the Power button to restart your device.

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Third workaround: Master reset/Factory data reset.

You may resort to wiping your device and restoring the original settings if all else failed to fix the issue. This however will delete important data including your personal information on the internal storage. Should you wish to continue, back up data on your internal memory then follow these steps to proceed with a master reset:

  1. Swipe up or down from the center of the Home screen to access the Apps screen.
  2. Navigate to Settings-> General Management.
  3. Tap Reset.
  4. Select Factory data reset from the given options.
  5. Review the information then tap Reset to continue.
  6. If prompted, enter your device credentials like PIN, Password, or Pattern.
  7. Tap Delete All to confirm reset.
  8. Allow your phone to finish the factory data reset and reboots automatically.

After the restart, set up your device to use it again as you normally do.

Battery saving tips to preserve power on your Galaxy Note 8

It is recommended to monitor your battery usage regularly. By monitoring means viewing the estimated battery life based on how much you have used over the past week and likewise determining how much battery your apps are consuming. To view and check battery usage on your Galaxy Note 8, follow these steps:

  1. Go to Apps-> Settings menu.
  2. Touch Search and then search for and select Battery.
  3. Touch Battery Usage.
  4. Review the details including the estimated battery life and breakdown of much the battery is being used up by recent apps.

If something is unusual like when a certain app is consuming a significant amount of battery, then you need to manage that app.

Aside from managing battery usage for each app, these subsequent workarounds can also help preserve battery life on your Galaxy Note 8.

Enable auto-brightness.

Turning this feature on will trigger your device to automatically adjust screen brightness depending on the environment. Doing so will not only save battery juice but also reduce eye strain. Here’s how to configure this setting on your Note 8:

  1. Go to Apps-> Settings menu.
  2. Touch Search then search for and select Auto-brightness.
  3. Tap the slider to turn Auto-brightness on.

Adjust screen timeout.

Shorten your phone’s screen timeout to save battery life on your Galaxy Note 8. Here’s how:

  1. Go to Apps-> Settings menu.
  2. Tap Search.
  3. Search for and select Screen timeout.
  4. Select the shortest timeout duration (15 seconds).

Block accidental touches on your Galaxy Note 8.

When you put your phone inside your pocket, chances are that you would dial someone unintentionally. That accidental touches would result to your phone being activated thus battery consumption. To prevent this from occurring, you can block accidental touches with these steps:

  1. Go to Apps->Settings menu.
  2. Touch Search then search for and select Block accidental touches.
  3. Tap the slider to enable or turn on Block accidental touches option.

This will prevent the screen from detecting touch input while your phone is in your pocket or bag.

Always On Display

You can set your device to keep all important information like date and time within easy reach using Always on Display. But enabling this feature also uses battery power as your screen stays active all the time. To extend battery life, you can disable Always On Display on your Galaxy Note 8 with these steps:

  1. Go to Apps-> Settings menu.
  2. Touch Search then search for and select Always on Display.
  3. Touch the slider to turn off Always On Display.

Use Power Saving Mode.

Another way to extend battery life is by putting your device in battery saving mode. While it decreases your phone’s performance, it saves battery life. Here’s how to activate power saving mode on your Note 8:

  1. Go to Apps-> Settings menu.
  2. Touch Search and then search for and select Battery.
  3. Tap to select the Power saving mode you prefer. Among the available options to choose from include Off, Mid, and Max. You can select between Mid and Max options.
  4. Tap Apply to implement the settings.
  5. To modify power saving mode settings, tap the option to Customize. Your phone switches back to normal mode when it’s fully charged.

Seek more help

If your Samsung Galaxy Note 8 battery is still draining so quickly after applying all prior workarounds and battery-saving tips, then you should consider escalating the problem to Samsung Support for further recommendations. Let them know that the problem started after installing the latest software update, so they can make further assessments and if necessary, have it tagged among other post update issues to be addressed in the next update rollout.

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