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Samsung Galaxy S21 - overnight battery draining issue on Samsung community

This is a screenshot taken on the Samsung community a few days ago. Smartphones are evolving to maintain their battery level for days. But still, few people are experiencing battery drain overnight on their Samsung S10, S20, S21 & S22 smartphones.

But your problem will be solved today! In this guide, I am going to tell you how to fix your Samsung smartphone by draining the battery overnight. I have researched this issue and collected all the possible solutions just to present to you!

Keep reading, the answers are a few scrolls away!

Why does my Samsung phone battery drain overnight?

smartphone low battery

There can be one or few reasons. Usually, the battery draining happens when there is an active process consistently running in the background. Android system terminates such processes when there is an over usage of the battery.

But if the battery drains overnight that means one or many processes run in the background overnight, consistently.

If you ask if there are any other reasons why it is happening, well here are some other causes to drain the battery overnight;

  • Poor signals

When there are low or no cellular signals coming to your Samsung galaxy device, it will try to strengthen the receiving to get the maximum signals. This can increase CPU usage and also drain the battery. If it happens overnight, then this might be the issue.

  • Poor configurations

Are you the kind of user who does not pay attention to his smartphone’s settings configured correctly?

Your Samsung Galaxy device could come pre-configured. This could have enabled various features that eat up your smartphone’s battery.

  • Third-party app

Unsupported/buggy apps that you download from the play store or from any other website can cause many issues on your device.

So if such an app runs in the background, then that might be the reason why your Samsung smartphone’s battery goes down overnight.

  • Software update

One time I remember my Samsung Galaxy S9 has begun to drain the battery by itself during the night. I tried every possible solution on the internet. But nothing worked.

Later I discovered that it is happening because of a software update. The problem was caused by a system app that kept running overnight, eating my battery for no reason.

How to fix Samsung Galaxy S10, S20, S21 & S22 battery drain overnight

battery draining fix

There can also be other reasons why your smartphone’s battery goes down at night. But I only talked about the most common reason here for the sake of this guide.

Now let’s talk about how you can reduce or stop battery draining on your device. Some of these fixes are temporary, but those will help you to keep your device’s battery during the night till Samsung sends a software update to fix the issue permanently.

Fix 01 – Turn on Airplane mode during the night

Airplane mode

If you aren’t a busy person at night, this option is best for you. You can turn on Airplane mode when you go to sleep or when you don’t need your device during the night.

This method also has drawbacks as well. When the Airplane mode is on, you won’t receive any calls or text messages through the cellular network. Even you turn on VOLTE calls.

So if you are ok with that, you can turn on the Airplane mode and see if the problem is gone.

Fix 02 – Select a different network

In a previous section, I told you that poor network connection (poor signals) can significantly increase the battery draining of your smartphone.

So what you can do about that? Well, the answer is you have to change the network to see if that works.

Not sure? Here is a comment that a user posted on the Samsung community;

Samsung galaxy battery draining issue answer on forum

you can change your network by following these steps:

  • Go to Settings then Mobile networks.
  • Inside the Mobile networks, tap on Network operators.
  • Now you will see a list of available networks, select a different one.

Now you can check if the problem still persists.

Fix 03 – Turn off unnecessary features

Unnecessary features cause battery draining overnight

Features like Bluetooth, GPS, NFC & Nearby share can drain your Galaxy smartphone’s battery quickly. It is because these features have a higher battery consumption rate (except Bluetooth which has optimized for lower battery consumption).

Therefore, if you don’t use these features during the night, it is better to turn them off. This will help to reduce your device’s battery drains overnight.

Fix 04 – Clear cached data

When I research for any android software-related error, the most used fixes are Clearing the cache and Resetting the device.

It is because when you clear your smartphone’s cache, it allows the device to regenerate fresh cache and it can solve a lot of Operating system-based problems.

Since you have checked for 3rd party app issues and if it did not work, you can try wiping the cache data of your Samsung Galaxy device. Here is how you can do that;

Read: Recovery Mode on Samsung Galaxy Smartphones – Complete Guide (2022)

Note: Clearing the cache won’t take much time. But make sure your smartphone has at least 70% of battery level remaining.

  1. Turn off your device
  2. Press and hold the Volume up key (+) & Power button till your device boot into recovery mode.
  3. Use volume keys to navigate to the wipe cache partition option and press the power button
Wipe cache partition option in S22
  1. Now select Yes & confirm the process by pressing the power button again
Confirmation to wipe cache partition S22

Once the wipe cache partition is done, you will see the recovery mode again. Then;

  1. Select reboot device & press the power button to reboot the device

After the device reboot, try doing the previous fixes to see if the problem is fixed.

Fix 05 – Factory data reset

If none of the above fixes worked for your Samsung smartphone, the last option you are left with is resetting your device by clearing all of its data.

This fix is best if your device’s battery was perfectly fine recently. There are 2 ways that you can perform a factory data reset:

  • Soft factory data reset
  • Hard factory data reset

For your problem, a hard reset will be the best option. Now let’s see how you can perform a hard reset on your Samsung device.

Note: Take a backup before performing a factory data reset. Also, make sure your device has at least 70% battery level remaining.

  1. Turn off your device.
  2. Press and hold the volume up key & power key until the recovery mode appears (as in the previous method)
  3. Now select Factory data reset (use volume keys) and press the power button.
  4. Confirm & press the power button again.


That is the end of the guide. I hope you could successfully fix your Samsung Galaxy smartphone’s overnight battery draining issue. Keep in mind that if none of the fixes worked for you, that means the problem is probably with the software itself. Therefore, it is good to keep an eye on new software updates.

Which method worked for you? If you have any questions regarding this guide, feel free to leave a comment below.

Have a great day!

Check out these Samsung Galaxy smartphone articles too!


The founder of and the tech nerd of the team. He is specialized in Android/iOS development and web development.

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