How to fix Galaxy S8+ won’t charge at random issue

Do you have a charging issue on your Galaxy S8+? Today’s troubleshooting episode talks about how to fix an S8+ that rejects chargers randomly. Learn what to do if you are in a similar bind.

Problem: Galaxy S8+ won’t charge at random

Hi, My Galaxy s8+ has recently started to reject chargers randomly.  What I mean is that I will use the same chargers for months (one at my home and one at my office.) and the phone will charge normally and then randomly for no apparent reason it will essentially stop taking a charge from that charger.  when I plug the phone in, the time to full charge shown on the lock screen will show for example one hour to full charge, and then 1-2 seconds later it will change to show 15-16 hours till full charge. The phone will be on the charger all night, and in the morning have a lower charge than when I plugged it in because it is charging so slow. When this happens I will switch to a different charger, and the phone will go back to normal, and then a few days to a week later, I will put the phone back on the original charger and it will charge normally again for a few weeks till it again randomly rejects the charger.  It has done this with charging from my computer, from a USB hub, and from dedicated wall chargers. Most of the time when this happens, I just switch to using my wifes wireless charger, but I can’t figure out why the phone will at random stop taking a charge from a charger it has been charging on without issue for so long. Thanks.

Solution: An issue like this does not have a straight answer. To see if you can fix it on your level, follow our suggestions below.

Forced reboot

Some charging issues are brought about by temporary bugs. They usually go away after a system refresh. In your case, we recommend that simulate the effects of a “battery pull” in order to check if the problem goes away. Here’s how:

  1. Press and hold the Power + Volume Down buttons for approximately 10 seconds or until the device power cycles. Allow several seconds for the Maintenance Boot Mode screen to appear.
  2. From the Maintenance Boot Mode screen, select Normal Boot. You can use the volume buttons to cycle through the available options and the lower left button (below the volume buttons) to select. Wait for up to 90 seconds for the reset to complete.

Use known working charging accessories

Charging cables do go bad. That may be hard to believe especially if there’s no obvious damage but that’s the reality. There are hundreds of tiny wires in a typical USB cable so the more these wires are cut, the lesser power is transferred to the phone during charging. For troubleshooting purposes, we recommend that you use a new cable and adapter to see if any one of them is to blame. As much as possible, you only want to use official charging accessories but if that’s not possible, you can use new compatible third party ones.

Clean the charging port

It’s possible that there may be dirt or foreign object that may be randomly interfering with the charging cable. Make sure to clean the port using a can of compressed air. Do not stick anything inside to avoid damaging the system.

If possible, use a magnifying tool to take a peek inside the port. If you think there’s lint or foreign object in there, clean it up properly using compressed air.

Charge on Safe Mode

Some apps may be interfere with Android and can lead to all sorts of problems. To check if a bad app has been  installed, you can boot the phone to safe mode and observe it while charging. You want to do this as many times as possible in order to be sure. If your Galaxy S8 Plus charges fine on safe mode only, you can be sure that an app is to blame. To boot your S8 Plus 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.

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 S8 Plus is still problematic, repeat steps 1-4.

Reset all settings

This procedure is separate from the previous one as it covers all settings of your Android device and not just the apps. To do this, follow the steps below:

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap General Management > Reset settings.
  3. Tap Reset settings.
  4. If you have set up a PIN, enter it.
  5. Tap Reset settings. Once complete a confirmation window will appear.

Factory reset

Lastly, try to wipe your phone and return all software settings back to their defaults with a factory reset. If the cause of the problem is a software bug, factory reset must help. To factory reset your S8:

  1. Create a backup of your data.
  2. Turn off the device.
  3. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  4. 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).
  5. Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  6. Press Power button to select.
  7. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  8. Press Power button to select and start the master reset.
  9. When the master reset is complete, ‘Reboot system now’ is highlighted.
  10. Press the Power key to restart the device.

Get Samsung’s help

Should none of the solutions above work, that means that the problem is likely hardware-related, or buried deep inside the device’s codes. Either of these issues are not fixable on an end user’s level so you want to simply have the phone replaced. Visit your local Samsung Service Center to discuss options for you.


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Harvey Hisona

Harvey is keen with mobile technology and loves writing about all things mobile. He is passionate in helping technology-challenged people by finding resolution to their issues. Contact me at Email

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