It's not uncommon for a Windows 10 laptop to display the wrong battery percentage. Perhaps the battery percentage is not decreasing or it is just not accurate. This could be a fault in the battery hardware or in the Windows software. We'll show you how to fix the problem and show the correct battery level.
Also, if you've ever had a laptop shut down unexpectedly, even when it seemed that it still had enough battery, this will help you fix the problem.
Laptop batteries don't last forever
Not all laptop batteries are created equal. A laptop battery has a fixed capacity, which is determined by the milliampere hour (mAH). Simply put, the higher the mAH, the more power the battery can hold. It's common for more expensive laptops to have better batteries, but check your manufacturer's specifications if you're not sure.
The amount of time your laptop stays on without additional charging depends on how you use the laptop. Full brightness screen, watching videos, and running lots of programs are all things that drain your battery faster.
No matter how lightly you use your laptop, the overall battery capacity will always decrease over time. Each battery has a certain number of charge and charge cycles. They are also influenced by environmental factors such as heat.
Of course, no battery lasts as long as when you bought a laptop. Typically, you will notice a decrease in battery life after 18 to 24 months.
You can use the battery health tools to get a better understanding of how your battery is behaving.
The remaining battery life is a prediction
Before reading the steps below to sort the Windows-supplied battery level, understand how it is calculated as it may not be wrong to begin with.
The battery life estimate provided by Windows is an estimate. It is based on what your laptop is currently doing and assumes that it will continue to do so.
When you're watching a video, playing a game, or doing something intense, Windows estimates a reduced number of hours remaining.
However, if you quit the game, lower the screen brightness, and only open one Word document, the number of hours left on the battery will skyrocket.
The number can also change without your actively doing anything, for example if a program installs updates in the background.
So if the number of hours remaining fluctuates significantly, this may be normal. However, if your laptop suddenly turns off when it is 30% charge, then there is a problem.
1. How to calibrate your laptop battery
If your laptop's battery meter shows an incorrect percentage or time estimate, the most likely way to fix it is to calibrate the battery. Here you can drive the battery from a full charge to empty and then recharge it.
This process does not give your battery more power or extend its life, but instead allows Windows to provide accurate readings.
1. Customize your power plan
To begin, Right click the Battery icon in the system tray. click Energy settings, then click Change when the computer is asleep from the left menu.
Make a note of your existing settings here, as you will have to reset them later. Change all the drop-down lists to never and click save Changes.
click Change advanced power settings. Expand battery, then expand Critical battery level. Write down the current percentage for later. Press the Battery powered Percent and set it as low as possible.
Expand Critical battery action and make sure that Battery powered is set to Overwinter. If it doesn't, click to change it.
When you're done, click OK to save the changes.
2. Charge your laptop
Connect your laptop and charge the battery to 100%. You can still use your laptop while doing this.
When it reaches 100%, stop using the laptop and wait a couple of hours. You want the battery to cool down. It also takes into account any additional charges that may arise if the 100% measurement is inaccurate.
3. Disconnect your laptop
Unplug your laptop and let the battery discharge. You can still use your laptop during this time. You have to wait for the laptop to completely empty and turn off. When it's done, let it sit for a couple of hours.
4. Recharge your laptop
Reconnect the laptop to the power supply and charge the battery to 100%. Go back to the Windows Power Plan Settings, follow the previous instructions and get everything back up to date (or tweak it to something new if you want).
The battery percentage provided by Windows should now be correct. If it doesn't, try the other steps below.
2. How to reinstall battery drivers Re
Your battery drivers may be missing or damaged, causing an incorrect percentage. This can also be helpful when your laptop is plugged in and not charging. Let's reinstall them.
Press Windows Key + X and click Device manager.
Expand Batteries, and you should see Microsoft power supply and Battery for Microsoft ACPI-compliant tax method.
- Right click on Battery for Microsoft ACPI-compliant tax method and click Uninstall device. Wait for this to finish.
When you're done, click on the top menu Action> Check for Hardware Changes. This will reinstall the driver. Restart your computer when it is done.
3. How to update Windows
You should always keep Windows up to date to protect your system and take advantage of the latest features.
There is an issue with Windows where the battery percentage that appears when you hover over the battery icon in the system tray is one percent different from the number that appears when you click it. This is usually resolved by updating Windows.
To make sure your laptop is running the latest version of Windows:
Press Windows key + I to open settings
click Update & security.
click Check for updates. All available updates will be downloaded and installed automatically.
Extend the life of your Windows battery
Hopefully this helped you understand how to read your Windows laptop battery and fix it if necessary.
If your laptop battery is getting old and not delivering a lot of power, consider using custom Windows power plans to conserve power and extend battery life.
How to extend the battery life of laptops with custom Windows power plans
Windows power plans are essential for managing laptops. Here's what you need to do if you want to save energy and extend battery life!
About the author
(619 published articles)
Joe was born with a keyboard in hand and immediately started writing about technology. He has a BA (Hons) in Business and is now a full-time freelancer who enjoys making technology easy for everyone.
Posted by Joe Keeley
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