Wrong Laptop Battery Percentage, Here’s How To Fix It

By | January 9, 2022

It is not uncommon for Windows 10 laptops to display incorrect battery information. This could be a fault with the battery hardware or Windows software. We will show you how to fix it and make it display the proper battery charge level.

If you’ve ever experienced a laptop shutting down unexpectedly, even when you seem to have enough battery, this should help you fix the problem.

Not every laptop battery is created equal. Laptop batteries have a defined capacity, defined by milliamp-hours (mAH). Simply put, the higher the mAH value, the more power the battery can hold. It’s common for more expensive laptops to have better batteries, but check your manufacturer’s specs if you’re not sure.

The amount of time your laptop will stay without costing you more depends on how you use the laptop. Having the screen at full brightness, watching videos, and running multiple programs are all things that will drain the battery faster.

There is also debate about whether removing a laptop battery will increase its lifespan.

That said, no matter how lightly you use your laptop, the total battery capacity will always decrease over time. Each battery has a specific number of charge and recharge cycles. They are also affected by environmental factors such as heat. Of course, the battery won’t last as long as it did when you bought the laptop. Typically, you will notice a reduction in battery runtime after 18 to 24 months.

Remaining Battery Is Prediction

Before you go through the steps below to try to sort out the battery readings provided by Windows, you should understand how they are calculated as these might not go wrong, for starters.

The estimated battery time provided by Windows is an estimate. It is based on what your laptop is currently doing and assumes it will continue to do so.

If you’re watching a video, or playing a game, or doing something intensive like that, Windows won’t estimate how many hours you have left.

However, if you stop playing the game, reduce the screen brightness, and only open a Word document, the number of hours remaining on the battery will increase.

The number can also change without you actively doing anything, such as if a program installs updates in the background.

So if the remaining hours count skips a lot, it’s probably normal. But if your laptop suddenly shuts down at a 30 percent charge, there’s a problem.

Calibrate Your Laptop Battery

If your laptop’s battery meter displays the wrong number, the most likely way to solve it is to calibrate the battery. This is where you run the battery from full charge to empty and then back again.

This process will not give your battery more power or increase its life, but will instead allow Windows to give an accurate reading.

Customize Your Power Plan

  • To get started, right click battery icon on the taskbar. Click Power Options, then click Change when the computer sleeps from the left menu.
  • Pay attention to the settings here as you will have to restore them later. Change all dropdowns to never and click Save changes.
  • Click Change advanced power settings. Expand Battery, then expand Critical battery level. Record the current percentage for later. Click percentage On battery and set it as low as possible.
  • Expand Critical battery action and make sure that On battery set to Hibernate. If not, click to change it.
  • When finished, click OK to save changes.

Charge Your Laptop

Connect your laptop and charge the battery to 100 percent. You can still use your laptop while doing this.

When it reaches 100 percent, stop using the laptop and wait a few hours. You want the battery to cool down. It will also be responsible for any additional charges that may need to be incurred if the reading is 100 percent inaccurate.

Unplug Your Laptop

Uncharge your laptop and let the battery drain. Again, you can use your laptop during this time. You have to wait until the laptop completely runs out of power and turns off. When it’s done, let it rest for a few hours.

Charge Your Laptop Again

Plug the laptop back into power and charge the battery to 100 percent. Go back to Windows power plan settings, follow the previous instructions, and set everything back to the way it was. (Or adapt it to something new, if you prefer.)

The battery percentage provided by Windows should now be accurate. If not, try the other steps below.

Reinstall the Battery Driver

Your battery driver may be missing or corrupted and thus causing an incorrect percentage reading. Let’s reinstall.

Press the button Windows + X and click Device Manager. copy Batteries and you will see Microsoft AC Adapter and Microsoft ACPI-Compliant Method Method Battery.

Right click on Microsoft ACPI-Compliant Control Method Battery and click Uninstall device. Wait for this to finish.

When finished, from the top menu, click Action > Scan for hardware changes. This will reinstall the driver. Restart your computer when finished.

Update Windows

You should keep Windows up to date to keep your system protected and benefit from the latest features.

The problem with Windows out-of-date is that the battery percentage displayed when you hover over the taskbar icon, compared to the percentage displayed when you click on it, is one percent different.

To make sure your laptop is running the latest version of Windows, press the key Windows + I to open Settings, click Updates & Security, and click Check for updates. Any available updates will automatically download and install.

Optimize Your Battery Life

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