Galaxy S7 edge won’t charge properly after an update

Ever since the first updates for the #GalaxyS7 were released, there’s already a lot of issues that we’ve encountered for this device. For today’s troubleshooting article, we want to address a rather common problem for Galaxy devices — charging behavior becomes erratic following an update. If you think you got the same issue on your S7, then consider this a good source of information on how to fix it.

Today’s problem: Galaxy S7 edge won’t charge properly after an update

Hi. I’m Emilie. Since the last update of my phone that occurred about 3 days ago, I have very concerning issues with the charging and the battery. Now, I can’t even use my phone while charging; the battery level will either remain at the same level or worse, it will go down.

So I tried to turn off the phone and then charge it. It worked while it lasted but the same problem occurred again: the phone charged for 2 hours and then the charging stopped at a certain battery level. It’s been 2 days since my phone haven’t reached 100% battery level. And before the new update, I had NEVER EVER experienced this kind of issue. — Emilie

How to fix Galaxy S7 edge that won’t charge properly after an update

Hi Emilie. If you’re positive that the problem started after you installed Android update, that’s very concerning. That can mean that your phone may have coding issue with its operating system which may or may not be fixable on your end. To see if this can be fixed, you must try our suggestions below.

Wipe the cache partition

First, you want to know if this glitch is caused by a bad system cache. To do that, you want to clear the cache partition. Here’s how:

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

Try charging in Safe Mode

One possible reason for your problem may be  due to a bad third party app. To check, restart your S7 to safe mode and see how charging works. If it works normally in safe mode but not when it’s back to normal mode, you have an app problem.

To restart to safe mode, follow these steps:

  1. Turn your Galaxy S7 off.
  2. Press and hold the Power button.
  3. Once the ‘Samsung Galaxy S7’ logo appears, release the Power key and immediately press and hold the Volume Down button.
  4. Continue holding the button until the phone finishes rebooting.
  5. Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.
  6. Let your phone run in this mode for 24 hours and make sure to check if charging works.

Calibrate Android and battery

Sometimes, Android may lose track of true battery levels. This can happen after the device has run for some time, or if the operating system becomes corrupted. To train Android again to detect the true remaining battery levels, follow these instructions:

  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. Restart your S7
  4. Use your phone until it completely runs out of power again.
  5. Repeat steps 1-5.

Wipe the phone via Recovery Mode

This potential solution is also called factory or master reset. Refer to the steps below on how to do it:

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.

Downgrade Android

Since the issue started to occur after updating the operating system, there’s a chance that reverting to the previous Android version may fix this issue for you. What you need to do is to flash the previous Android that ran on your device. For example, if you’ve recently installed a new update for Android Nougat, flashing the firmware back to, say Android 7.0, may help.

This solution requires that you flash or manually install the firmware. In case you’re not aware of it, flashing is a risky procedure that might turn your S7 edge into a paperweight. It also requires some advanced Android knowledge so if you’re not confident that you can do it on your own, we suggest that you simply skip this one.

Get professional help

If your S7 is still problematic up to this point, you need to let Samsung know about it so they can check the device and do what’s necessary. It may end up with repair or replacement so either way, you’ll have to send the device in.