Fix Battery Drain Issues in Samsung Galaxy S21 Ultra 5G SM-G9980/B/N/U/U1/W…

Fix Battery Drain Issues in Samsung Galaxy S21 Ultra 5G SM-G9980/B/N/U/U1/W After Installing Update

Flagship mobiles in the Android sector are compared directly with iPhones. So, Companies like Samsung always put their hard effort into fulfilling all specs and features. Also, Due to maintaining a perfect design, They can’t put a massive battery in it. So, By optimizing the software, they try their best to give better battery backup. Samsung Galaxy S21 Ultra 5G comes with a 5000mAh battery. Due to the power of Flagship mobiles, It will drain the battery quickly compared with mid-range mobiles. It can give one-day battery backup without any hassle. But when you notice a sudden battery drain issue after app installation or update, you can fix your Battery Drain Issues in Samsung Galaxy S21 Ultra 5G using one of the below methods.

After the Samsung Galaxy S21 Ultra 5G update, why does the battery drain happen?

However, before we continue, you may want to know a few things about Samsung and its regular OS updates available for the Galaxy series mobiles, as well as the flagship-level series. Samsung has rolled out an OTA update for these models to fix the various bugs reported by users. However, while this update is supposed to fix the previous bugs experienced by the users of these Samsung device models, it also tends to come with a bug that makes the devices consume a lot of Battery. Not all Galaxy mobile users reported about this battery drain issue, anyway. But, if you’re among the users who got affected, we have a solution here.

However, this battery drain issue seems to be associated with Galaxy devices running on One UI. Nevertheless, we have a couple of solutions, and none of them is hard to practice.

How to fix battery drain issues on Samsung Galaxy S21 Ultra 5G after installing the update (SM-G9980, SM-G998B, SM-G998N, SM-G998U, SM-G998U1, SM-G998W)?

Whenever a successor version of Android is released, they always FOCUS on Battery improvement. Most of the time, we notice battery drain issues after the latest security patch update or major upgrades like Android 10. But sometimes, due to some glitch or issues, It can happen on the opposite side. When you face the battery drain issue in your Samsung Galaxy S21 Ultra 5G, You can use the below fix methods.

battery, drain, issues, samsung, galaxy

Install the latest software

You may need to check out a newer software update available for your device. To check out this, follow the steps below. The bug causing your Galaxy device to consume much Battery has likely been fixed in a newer software version; thus, upgrading to the most recent version of your device. It is wise to take a complete backup before updating your mobile.

Go to your mobile device settings.

Scroll down to the About Section and click on the “Software update” option

Tap the “Download and install” option

Wait for the searching to complete to see if any new updates are available.

However, if there is no more original version, kindly try other solutions below.

Sleep most power-consuming apps

It is merely disabling most auto-run and irrelevant apps that run in the background and drain your battery quicker. The option to sleep the apps that make more use of your Battery is also available in the device care option. Follow the steps below to sleep most apps on your Galaxy device running on One UI. It may bring an end to this issue.

Go to your settings and select the “Device Care” option.

Look at the bottom; many icons are available there; click on the “Battery” icon.

You’ll see all the apps that are draining your Battery.

Click on them one after the other and toggle the switch beside “Put app to sleep” to be active.

You can even choose to uninstall the app if it is not essential. Finally, you may want to change the Power Mode to “High Power Saving Mode” if you wish. Click on the “” icon at the top-right to access more battery optimization options.

Auto Optimization

In some cases, optimizing the battery performance will help to make everything start to function well as supposed. Auto Optimizing your device battery performance is a feature built into Samsung’s new devices that allow you to delete cache files and stop irrelevant processes that automatically on the background and drain your device battery. It is one of the best ways to solve this battery drain issue.

Scroll down until you see the Device care option; click on the Device Care.

Click on the three-dotted vertical lines at the top right corner and select “Auto-optimization.”

You may need to set a time that you don’t often use your device, maybe during the nighttime.

Natural Battery Calibration

Used up the Battery until it drains completely; i.e., make sure you use the device until the battery gets to 0% and the device powers off by itself. Do not attempt to charge the Battery in-between this period, ignore the low battery warning, and drain the battery completely.

Repeat the two steps; drain the Battery and charge it back to 100%

This process requires a steady power supply as the device is not supposed to be unplugged during the charge period until it reaches 100%.

After doing this two consecutive times, It will recalibrate your Battery, which might fight the issues you’ve been facing for a long time.

Recalibrate your Battery using USSD codes to deal with the Samsung Galaxy S21 Ultra 5G battery drain issue

Launch your device dialer and dial this code – #0228#

Follow on-screen Instructions

Diagnose apps using Safe Mode

Safe mode allows us to disable third-party apps. When you didn’t face any issues in Safe Mode, the problem for the battery drain is non-system apps. So, you have to find which app to remove. Start with the last installed app. You can boot your mobile into Safe Mode by pressing the Volume Down button’s power button. The combination may vary depending on the manufacturer. Even in safe mode, you have to try other methods if you face the problem.

Clear partition cache

Another solution is the clearing of the cache. When caches build upon our mobile phone, they can result in quite a lot of malfunctioning. Thus, clearing all the caches on your device may help fix the battery issue you’re facing.

Boot into Samsung Galaxy S21 Ultra 5G recovery mode pressing down the Volume Up key, the Volume Down Key, and Power key simultaneously.

Use the volume keys to navigate and the Power key to launch an option; select “clean cache partition.”

Ignore the warning message that will appear on your screen and continue

Disable unwanted apps using ADB to fix the Samsung Galaxy S21 Ultra 5G battery drain issue

  • Enable USB Debugging Mode and OEM Unlock; you’ll find these options at Settings Developer options. If you didn’t see the developer options on your settings menu, then go to about build number. Click on the “Build Number” row about ten times regularly to activate “Developer Option” on your device.
  • Connect your mobile with a PC and unlock your mobile (Screen Lock).
  • Open a command prompt as Administrator and type the below command to check the ADB status.
  • adb devices
  • The above command will display some code for device detection. If you didn’t receive any response, Check with the USB Cable. If you get a response, move to the below commands.
  • You can disable the apps based on their adb package name. You can find these package names using the below command.
  • adb shell pm list packages
  • Based on the title, you can exclude unwanted apps. After that, use the am force-stop and pm disables commands with the Application package name.
  • You can enter the commands one by one, Or All commands and Hit Enter. You can get the application package name in Play Store URL. It will start with com.instagram. Android like that.
  • am force-stop package name(e.g: com.sprint.w.installer)
  • Restart your mobile when you are again stuck on boot logon on your Samsung Galaxy S21 Ultra 5G mobile move to different methods.

Reset Your Mobile

  • Hard Reset/Factory Reset– It will remove all user data. Your mobile OS will become new, like when you purchased it, and you have to set up everything from the beginning.

You can also use your mobile recovery to reset when you can’t boot into your Mobile OS.

9.1 Stock Recovery method

  • Switch off your device. It will boot your mobile into Recovery mode. To do this, press and hold down the Volume Up Power buttons simultaneously for some time. Then, enter into the Stock Recovery mode.
  • If you don’t use Rooted mobiles, you have Stock Recovery, which your official mobile manufacturer provides most of the time. If you have stock recovery, you have the direct option as “Wipe Data/Factory Reset.” Navigate to this option and confirm it using the power key button. Remember, It will delete your entire mobile data. So, backup first before the process.

9.2 TWRP Recovery method

When using Rooted mobiles, you either use Stock Recovery or TWRP custom recovery. If you have Stock Recovery, you can use the above process. When you install TWRP on your mobile, follow the steps below.

  • The Keycombinations will boot your mobile into TWRP Recovery mode.
  • On the Home screen, you can find the option “Wipe.” Select the wipe option; you will receive further details. Select “Dalvik, Data, and Internal Storage.” Don’t select the System, and it will wipe your OS. After selecting other choices, swipe to erase the data. When the process completes, return to home and boot into OS.

Flash Complete Firmware using ODIN

We are going full flash firmware in your boot logo stuck Samsung Galaxy S21 Ultra 5G mobile in this method. It is a Data loss process. So when you don’t have any choice, and none of the above methods don’t work for you, you can use them. Refer- Flash Samsung Galaxy S21 Ultra 5G Firmware using ODIN.

Wrap Up

People always face this kind of battery issue after the software update. Even if the software updates process looks simple, 5-10% of people always face problems making OTA updates. That’s why we suggest you always make a backup before making an update on your mobile. Always use Cloud photo backup services like Google Photos. Compared with other mobile manufacturers, with the help of Samsung’s available tools, we can fix your Samsung Galaxy S21 Ultra 5G battery drain issue.

If you are facing freeze and unresponsive issues on your mobile, You should try different methods than the above mentioned. It is always wise to run through that your previous energy savings options are turned on after the update. Based on your available storage and apps size, battery usage may vary. When you are confident that the settings are perfect for battery optimization, you can follow the above steps to fix your mobile. Comment below when you try different methods than above, and those techniques help you. We try to add if those methods work for everyone.

Selva Kumar is an Android Devices Enthusiast, Who Can Talk and Write About Anything If You Give a Hint About the respective devices. He is a Computer Science Graduate and Certified Android Developer, Making His Career towards this Technology. He is always eager to try new Android devices — not only Software level but Hardware-level Also. Beyond this, He is a Good Swimmer, Guitarist.

Here’s how to check the battery health in Samsung just like iPhone

The battery life of smartphones is a common concern among users. The frustration of having to constantly charge a device or experiencing a decrease in battery health can be overwhelming. Samsung, a prominent smartphone manufacturer, has included a feature that allows users to monitor and control their battery health.

While some degree of battery degradation over time is expected, drastic drops in battery health are uncommon. To address this issue, Samsung has provided a way to check battery health just like what is available on iPhone and even request repairs. This feature can be accessed through the “Samsung Members” app, which is pre-installed on Samsung devices.

How to check the battery health in Samsung smartphones

Unlike other Android devices, Samsung devices come with a native battery health check feature. This eliminates the need to download third-party apps to monitor the battery. However, some users may still prefer to use such apps.

To access the battery health check feature on a Samsung device, users can follow these steps:

  • Open the “Samsung Members” app.
  • Go to the “Assistance” tab located at the bottom right of the screen.
  • Click on “Phone Diagnostics.”
  • Select the “Battery” option.
  • Initiate the battery diagnostics.

Upon completing the diagnostics, information regarding the state of the battery will appear on the screen. If repairs are needed, users can access repair options through the “Samsung Members” app. The following steps can be followed:

  • Go to the “Assistance” tab.
  • Scroll down to the “Frequently Asked Questions” section.
  • Tap on “Battery.”
  • Click on “Request Repair.”

It is important to note that Samsung provides additional support options for users. These options include contacting a specialized technical service agent via text chat or remote support.

Overall, Samsung’s inclusion of a battery health check feature provides a convenient and reliable way for users to monitor and control their device’s battery life. With this feature, users can take proactive steps to ensure their devices’ batteries remain healthy and last longer.

Gizchina News of the week

In this section, we will discuss the signs that indicate a Samsung mobile battery is not in good condition and needs replacement.

Firstly, if your mobile device is new and the battery barely lasts in normal use, it may be an indication of a defective battery. While demanding and extended use can drain the battery, a new battery should be able to last a reasonable amount of time in normal use.

Secondly, if your device has slowed down significantly, it may be a sign that the battery is deteriorating. A warning message may also appear, indicating that the battery’s deterioration can negatively affect not only the device’s autonomy but also its performance.

Thirdly, if your mobile device is not charging with any charging accessory, it may indicate a defective battery. While it is possible that one or two accessories are defective, if all of them fail to charge the device, it is highly likely that the battery is the culprit.

Fourthly, if your device is compatible with wireless charging but does not charge wirelessly, it may also indicate a battery problem. This symptom is detected when the device does not charge even with original and/or certified charging bases.

Fifthly, if your device turns off long before reaching 1% battery life, it may indicate that the mobile battery needs calibration. However, if the issue persists even after calibration, it is a sign that the battery is not in good condition.

Lastly, if your device heats up relatively quickly and without being exposed to high temperatures, it may be due to battery problems. If this is not the culprit, it is clear that it will affect you, and you will need to take the device to a technical service center.

It is important to note that if your mobile device is new, you should not have to pay for any repairs related to a defective battery. When failures of this type occur in a recent device, it is covered by the warranty. The exception would be if the technical service center detects that the battery’s issue is not due to a factory defect but to misuse on your part.

Tips to maintain your smartphone battery health

Here are some tips to help you maintain the health of your smartphone’s battery:

  • Avoid overcharging: It’s important to unplug your phone once it reaches a full charge. Leaving it plugged in for too long can damage the battery.
  • Use a high-quality charger: Use a charger that is compatible with your phone and is of good quality. Avoid using cheap or counterfeit chargers, as they may damage your phone’s battery.
  • Keep the battery cool: High temperatures can harm your phone’s battery. Avoid leaving your phone in direct sunlight, and don’t leave it in a hot car.
  • Avoid always charging your phone to 100%: It’s not necessary to fully charge your phone to 100% all the time. Instead, try to keep your phone’s battery level between 20% and 80% for best performance.
  • Use battery-saving modes: Many smartphones have battery-saving modes that can help extend the life of your battery. You can also manually adjust the brightness of your screen and turn off features like Bluetooth and GPS when you’re not using them.
  • Keep your phone updated: Software updates can help improve your phone’s battery life. Make sure to keep your phone’s operating system and apps up-to-date.
  • Use airplane mode: If you’re in an area with poor cell service or don’t need to use your phone for a while, turning on airplane mode can help conserve your battery.

By following these tips, you can help extend the life of your smartphone’s battery and keep it in good health.

How to Calibrate Your Laptop’s Battery for Accurate Battery Life Estimates

    Chris Hoffman

So you’re using your laptop and, all of the sudden, it dies. There was no battery warning from Windows—in fact, you recently checked and Windows said you had 30% battery power left. What’s going on?

Even if you treat your laptop’s battery properly, its capacity will decrease over time. Its built-in power meter estimates how much juice available and how much time on battery you have left—but it can sometimes give you incorrect estimates.

battery, drain, issues, samsung, galaxy

This basic technique will work in Windows 10, 8, 7, Vista. Really, it will work for any device with a battery, including older MacBooks. It may not be necessary on some newer devices, however.

Why Calibrating the Battery Is Necessary

If you’re taking proper care of your laptop’s battery, you should be allowing it to discharge somewhat before plugging it back in and topping it off. You shouldn’t be allowing your laptop’s battery to die completely each time you use it, or even get extremely low. Performing regular top-ups will extend your battery’s life.

However, this sort of behavior can confuse the laptop’s battery meter. No matter how well you take care of the battery, its capacity will still decrease as a result of unavoidable factors like typical usage, age, and heat. If the battery isn’t allowed to run from 100% down to 0% occasionally, the battery’s power meter won’t know how much juice is actually in the battery. That means your laptop may think it’s at 30% capacity when it’s really at 1%—and then it shuts down unexpectedly.

Calibrating the battery won’t give you longer battery life, but it will give you more accurate estimates of how much battery power your device has left.

How Often Should You Calibrate the Battery?

Manufacturers that do recommend calibration often calibrating the battery every two to three months. This helps keep your battery readings accurate.

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In reality, you likely don’t have to do this that often if you’re not too worried about your laptop’s battery readings being completely precise. However, if you don’t calibrate your battery regularly, you may eventually find your laptop suddenly dying on you when you’re using it—without any prior warnings. When this happens, it’s definitely time to calibrate the battery.

Some modern devices may not require battery calibration at all. For example, Apple recommends battery calibration for older Macs with user-replaceable batteries, but says it’s not required for modern portable Macs with built-in batteries. Check your device manufacturer’s documentation to learn whether battery calibration is necessary on your device or not.

Basic Calibration Instructions

Recalibrating your battery is simple: just let the battery run from 100% capacity straight down to almost dead, and then charging it back to full. The battery’s power meter will see how long the battery actually lasts and get a much more accurate idea of how much capacity the battery has left.

Some laptop manufacturers include utilities that will calibrate the battery for you. These tools will usually just make sure your laptop has a full battery, disable power management settings, and allow the battery to run to empty so the battery’s internal circuitry can get an idea of how long the battery lasts. Check your laptop manufacturer’s website for information on using any utilities they provide.

You should also look at your laptop’s manual or help files. Each manufacturer may recommend a slightly different calibration procedure or tool to ensure your laptop’s battery is properly calibrated. Some manufacturers may even say this isn’t necessary on their hardware (like Apple). However, there’s no harm to performing a calibration, even if the manufacturer says it isn’t necessary. It just takes some of your time. The calibration process essentially runs the battery through a full discharge and recharge cycle.

How to Manually Calibrate a Battery

While it’s a good idea to use any included utilities or just follow instructions specific to your laptop, you can also perform battery calibration without any specialized tools. The basic process is simple:

  • Charge your laptop’s battery to full—that’s 100%.
  • Let the battery rest for at least two hours, leaving the computer plugged in. This will ensure that the battery is cool and not still hot from the charging process. You’re free to use your computer normally while it’s plugged in, but be sure it doesn’t get too hot. You want it to cool down.
  • Go into your computer’s power management settings and set it to automatically hibernate at 5% battery. To find these options, head to Control Panel Hardware and Sound Power Options Change plan settings Change advanced power settings. Look under the “Battery” category for the “Critical battery action” and “Critical battery level” options. (If you can’t set it to 5%, just set it as low as you can—for example, on one of our PCs, we couldn’t set these options below 7% battery.)
  • Pull the power plug and leave your laptop running and discharging until it automatically hibernates. You can keep using your computer normally while this happens.

NOTE: If you want to calibrate the battery while you aren’t using the computer, be sure your computer isn’t set to automatically sleep, hibernate, or turn its display off while idle. If your computer automatically enters power-saving mode while you’re away, it will save power and won’t discharge properly. To find these options, head to Control Panel Hardware and Sound Power Options Change plan settings.

  • Allow your computer to sit for five hours or so after it automatically hibernates or shuts down.
  • Plug your computer back into the outlet and charge it all the way back up to 100%. You can keep using your computer normally while it charges.
  • Ensure any power management settings are set to their normal values. For example, you probably want your computer to automatically power off the display and then go to sleep when you’re not using it to save battery power. You can change these settings while the computer charges.

Your laptop should now be reporting a more accurate amount of battery life, sparing you any surprise shutdowns and giving you a better idea of how much battery power you have at any given time.

The key to calibration is allowing the battery to run from 100% to almost empty, then charging it all the way up to 100% again, which may not happen in normal use. Once you’ve gone through this full charge cycle, the battery will know how much juice it has and report more accurate readings.

Chris Hoffman Chris Hoffman is Editor-in-Chief of How-To Geek. He’s written about technology for over a decade and was a PCWorld columnist for two years. Chris has written for The New York Times and Reader’s Digest, been interviewed as a technology expert on TV stations like Miami’s NBC 6, and had his work covered by news outlets like the BBC. Since 2011, Chris has written over 2,000 articles that have been read more than one billion times-and that’s just here at How-To Geek. Read Full Bio »

How to Extend your Samsung Galaxy Battery Life from Hidden Menu

The Samsung cell phone models that make up the Galaxy series are characterized by having batteries conditioned for intensive use. However, its autonomy and efficiency can decrease over time, causing frequent unexpected shutdowns or slowness to run very demanding applications.

That is why the most advisable thing is to practice a series of preventive measures, such as, for example, doing a proper battery calibration. It is also of great help to reduce the power consumption of the applications installed on the phone as much as possible in case of having a very low level of charge and not having a charger at hand.

The Samsung Galaxy Hidden Menus

These two options are accessible on a Samsung Galaxy cell phone from two secret menus that can be easily activated. For this, you only have to enter a sequence of characters with the keyboard that includes a series of digits and the asterisk and number keys. Here we show you.

How to Access the Samsung Galaxy Hidden Battery Menu

From this hidden menu of Samsung Galaxy phones it is possible to perform a battery calibration procedure, which will result in better terminal performance.

Follow these steps after you’ve charged the battery, preferably 100 percent, as the charge level may drop sharply during calibration.

Open the app to make phone calls. Then enter the sequence #0228#. The BatteryStatus screen will immediately open.

On this screen, click on Quick Start. Then click OK.

Now, fully charge the battery and repeat the process for one more time.

How to Access the Samsung Galaxy Hidden SysDump Menu

Now, the SysDump menu contains advanced system options, one of them being the Low battery dump function, which allows you to deactivate the phone’s applications in order not to consume battery.

This option has the disadvantage that the affected applications will not be able to synchronize information with their servers, so they will not comply with the work of notifying the user, however, it is very useful in case of having the battery with the minimum charge. Follow these steps to activate this function.

Open the app to make phone calls. Then enter the sequence #9900#. The SysDump menu will immediately open.

Click on the Low Battery Dump option so that it changes from Off mode to On mode. Then press Exit to exit the menu.

When your phone returns to an optimal charge level, you can deactivate this option following the same instructions.

Tips to Increase your Phone Battery Life

While it is true that the above procedures can help you improve the battery performance of your phone, your efforts will be useless if you do not take additional measures such as:

  • reducing the brightness of the screen,
  • uninstalling unnecessary applications (for example, supposed battery optimizers ),
  • turning off the Wi-Fi when you are away from home
  • keeping the device’s operating system updated,
  • or turning on the energy saving function in the models in which it is available.

Samsung Galaxy A54 5G Battery

We put the Samsung Galaxy A54 5G through our rigorous DXOMARK Battery test suite to measure its performance in autonomy, charging and efficiency. In these test results, we will break down how it fared in a variety of tests and several common use cases.


Sub-scores and attributes included in the calculations of the global score.

Samsung Galaxy A54 5G

These key points are derived from the lab measurements during testing and do not figure into the overall score. The lab measurements, however, are used for the overall score.


  • Good autonomy when used moderately
  • Very good autonomy when using the GPS on the go
  • Very low residual consumption of the charger when the device is fully charged, whether or not plugged in


  • Poor autonomy when streaming music
  • Low autonomy gained after a quick 5-minute charge
  • Poor charge efficiency

The Samsung Galaxy A54 5G struggled in some of our battery tests, resulting in an overall score that was just below our database average, but still much better than its predecessor.

The autonomy performances were quite good, with the 5000 mAh battery lasting 2.5 days when used moderately. When testing on-the-go and individual usages, the performances were average. However, the Galaxy A54 5G showed very good autonomy when using the GPS outdoors, but poor results when listening to music.

The charging experience of the Samsung Galaxy A54 5G was limited by its 25W charger. Even if the charging power surpassed this 25W, the charging time was slightly below average at only 1 hour and 40 minutes. The autonomy recovered after a quick 5-minute charge was also low, which contributed to its below-average score.

The A54 5G’s efficiency was weak, mainly due to poor charge efficiency. The discharge currents were average overall, except for navigation, which was good, but poor for music streaming, indicating that the device is not perfectly optimized.

Compared with other devices from the High-End segment, the Samsung Galaxy A54 5G still ranked below average. Its slightly above-average autonomy in this segment was offset by its poor charging experience and a low efficiency score.

Test Summary

About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)

The following section gathers key elements of our exhaustive tests and analyses performed in DXOMARK laboratories. Detailed performance evaluations under the form of reports are available upon request. Do not hesitate to contact us.

Battery Charger Wireless Display Processor
Samsung Galaxy A54 5G 5000mAh 25W (not included) AMOLED1080 x 2400 Exynos 1380
Samsung Galaxy A53 5G 5000mAh 25W (not included) AMOLED1080 x 2400 Samsung Exynos 1280
Xiaomi 12T 5000mAh 120W (not included) AMOLED1220 x 2712 Mediatek Dimensity 8100-Ultra

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