Windows 10 has a built-in, hidden battery report tool that can tell you everything you need to know about your laptop battery, including your battery life estimate and its capacity over time. Use this powercfg command to better understand your battery's health and optimize your computer's battery life.
We'll use the command prompt to generate an HTML battery report for your computer.
1. Hit Windows Button + X and select Command Prompt (Admin). This is the quickest way to open the Command Prompt as an administrator.
2. Type in and enter: powercfg /batteryreport
This command will create a battery report under C:\WINDOWS\system32\battery-report.html or, in Windows versions older than Windows 10, under C:\Users\[Username]
3. Open the Battery report HTML file to view it.
The report will give you more information about the batteries in your system, as well as how they've been used over time.
Perhaps of most usefulness to most people is the battery life estimates--how long you can expect your battery to last based on actual usage--and how it's changed since you first installed the OS. It's more accurate and precise than relying on the battery icon in your taskbar.
Other report sections such as Usage history and battery capacity can help you check your laptop battery's health. To get many more details about your battery than you from the battery icon in the taskbar, remember this hidden trick.
Having trouble seeing Windows 10's battery icon? Here's how to restore a missing battery icon in Windows 10.
Windows 10 Performance and Productivity
Lithium-ion batteries are the most common type of battery used in today’s mobile devices—including laptops and tablets. These batteries charge quickly, discharge at a steady rate, and they have high-energy density that allows for small cell sizes in batteries. By understanding a little about lithium-ion batteries, you can help maximize your battery life and the overall longevity of the battery in your device: The capacity of lithium-ion cells is reduced after a certain number of times the battery is charged and then discharged. This means you’ll need to charge your battery more often and the overall battery capacity may be lower. When using your device, make sure the battery regularly drains below 50%. This will help reduce deterioration in the battery cells. When battery capacity is lower, the battery can’t be charged as much as it used to compared to when it was newer. Therefore, battery life may be reduced and you’ll need to charge your battery more frequently. Like all batteries, lithium-ion cells age and deteriorate over time and with use. To help extend battery life and performance, try to keep the battery level between 20% and 80% several times a week instead of using your device for only a short amount of time, and then plugging it in to recharge the battery. If your device supports Smart charging, turn it on to make sure that your device stays charged to the recommended battery level—even if you keep your device plugged in. As you use your battery, you should avoid some conditions because they can lead to the battery deteriorating and aging at a faster rate: Try not to use your device or charge it at high temperatures. Extremely high temperatures can cause lithium-ion batteries to deteriorate at an accelerated rate, which can permanently lower the battery capacity. Store your device with the battery charged to below 50% but not completely drained. Batteries that are more fully charged and then stored may lose capacity faster. If you need to store your device for a long period of time, it’s best to make sure the battery level is below 50% but not completely drained before storing your device. When a battery has deteriorated a lot, battery life might be very short or the lithium-ion cells may expand. When a battery expands from deterioration, it’s most often caused by the formation of non-flammable carbon dioxide (CO2) gas. If your device’s battery has expanded visibly beyond the mechanical enclosure, we recommend that you stop using the device. You should handle the device with caution to prevent putting pressure on or puncturing the battery cell. If you’re interested in getting more technical info about your battery usage and estimated capacity, you can use the Powerfg command-line option that’s built into Windows 11 to generate a battery report. Select Search on the taskbar, type Command prompt, press and hold (or right-click) Command prompt, and then select Run as administrator > Yes. At the command prompt, type powercfg /batteryreport, then press Enter. The battery report will be an HTML file that’s stored in a folder on your PC. The file location will be shown in the Command Prompt window.
Open File Explorer, go to the folder that the report was saved to, and then double-click the battery report (HTML file) to open it in your web browser.
You can get a lot of detailed info about your battery usage and capacity. Some particular sections you might want to look at to get started include the following: Installed battery, Recent usage, and Battery usage.
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Battery saving tips in Windows
Batteries aren’t meant to last forever, including the battery that powers your laptop. It might seem like the power source that gives life to your device should be the tech equivalent of an everlasting gobstopper, but as with any other battery, your laptop battery has a life cycle that ends at some point.
It’s important to keep an eye on your laptop battery’s health for that very reason: it can, and likely will, die at some point, and you don’t want to get stuck replacing it in a pinch. Plus, just because the battery has died doesn’t mean you need to buy a new laptop. Tap or click here for five signs it’s time for a new laptop.
Let’s take a look at how you can check the life of your laptop battery on both PCs and Mac laptops.
Most laptops use lithium-ion batteries as the power source, and as a general rule, this type of battery tends to lose charging capabilities. This can cause your laptop battery, which once held a full charge of 100%, to be limited to, say, 30% over time.
This can interfere with productivity — and also your laptop’s efficiency. Laptops are meant to be portable, but if you can’t move them from one place to the next without the battery dying, it can cause issues with how useful your device is to you.
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This happens because your laptop battery is only equipped to handle a limited number of complete battery cycles or, in layman’s terms, the charging process in which your battery goes from 0% to 100% before it starts losing efficiency. If you consistently put your laptop battery through complete charge cycles, it will lose efficiency, and so will older batteries as they age.
Your laptop battery can also lose efficiency if you’re partially charging it. Let’s say you regularly charge your laptop from 30% to 50%, or about 20% each time you charge it. Well, do that five times and you’ll have completed one battery cycle because you’ve charged your laptop 100% in total.
You can’t just avoid charging your battery to cut down on the cycles you put it through, so it’s essential to check your battery’s health instead. Doing so will give you a good idea of how much more abuse your battery can take and help prompt you to make some changes to preserve battery health.
But how do you do that? Let’s take a look.
How to check the battery life on your laptop
The steps you take to check your battery health will depend on your laptop type. Checking on the health of your battery on a MacBook is much simpler than checking the health of your battery on a PC laptop, which involves a much more laborious process. Let’s start with the difficult one first.
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How to check the battery health of your PC laptop
Option 1: Use the Windows PowerShell terminal (Windows 8 or later).
You just have to use one simple command from the Windows Powershell terminal to check your battery health.
- Click the Start menu on your laptop.
- Search for PowerShell and then click on the PowerShell option that appears.
- Once it appears, type the following command: powercfg /batteryreport.
- Press Enter, which will generate a report that includes information on your battery health.
- Search for the folder in your user accounts directory with the name: C:\Users[YourUsername] to access the report.
- Note: Rather than searching for Powershell, you can opt to type “cmd” while pressing the Start button.
- Press Ctrl + Shift + Enter to run it in administrator mode.
- While in admin mode, type powercfg /batteryreport.
- Hit Enter.
- Go to Users\Your Username folder and look for the battery-report.html file to access the report.
Following either set of instructions above generates a report containing a ton of information on your laptop, including information about your battery health. This report will be an HTML file, so all you have to do is double-click it to view the contents.
You can find the information about your battery health by scrolling down on the report to the Battery Information section. This section will include subsections with details on Design Capacity, Full Charge Capacity, and Cycle Count.
It also includes a subsection called Battery Life Estimates, which will give you a clearer picture of how long your laptop battery will last on a full charge, along with information on how long it would last on a full charge when it was new. This information should help you better understand your battery’s life cycle.
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Option 2: Use Battery Report, which allows you to see your battery health (best for older laptops)
- Press Windows Key + X to open Win + X menu.
- Choose Command Prompt (Admin). (Note: This opens Command Prompt as an administrator, which allows you to run a battery report for your laptop).
- When Command Prompt opens, type in the same command you use for Windows PowerShell: powercfg /batteryreport and run the report.
This will do the same thing as the Windows PowerShell method: it will generate a report that includes information on your battery health, which can be found by searching in your accounts directory for a folder called C:\Users[YourUsername].
As with the PowerShell method, this report will show you information about your battery, along with the name, serial number, and chemistry type of the battery.
How to check the battery health of your Mac laptop
It’s surprisingly simple to check the health of your MacBook battery, especially when compared to checking the battery health on a PC laptop. To check the health of your battery on a MacBook:
- Hold the Option key and click on the Apple menu.
- Click on System Information.
- Scroll down to Hardware > Power > Cycle Count.
The “Cycle Count” section will give you a firm number of times your laptop battery has completed the battery cycle, and you can use this number to better understand where your MacBook battery is in its life cycle.
You’ll also find information on the full charge capacity, the charge remaining, and a ton of other information about your battery, including the serial number. This information is important because the battery cycles will vary with each model of the Macbook.
As you can see in the screenshot above, the MacBook this was written on has a cycle count of 253, which may seem high, but it’s a MacBook Pro and MacBook Pros that were released in 2009 and later have 1,000 cycles on their batteries. So, this MacBook is about a third of the way into the full battery life cycle.
But, if you complete a battery health check and find that your battery is at the end of its life cycle, don’t panic. There are plenty of replacement batteries available to keep your laptop up and running, and there are tons of ways to help preserve your overall battery life, which you can learn by tapping or clicking here.