How to check laptop battery wear (battery test)

laptop battery Good afternoon.

Probably I won't be mistaken if I say that every laptop user sooner or later thinks about the battery, or rather about its condition (degree of deterioration). In general, from experience I can say that most people start to get interested and ask questions on this topic when the battery starts to drain too quickly (for example, the laptop runs for less than an hour).

To find out the wear and tear of a laptop battery, you can take it to a service (where it can be assessed using special equipment), and use several simple methods (we will consider them in this article).

By the way, to find out the current state of the battery, just click on the power icon 2015-05-20 11_52_08- next to the clock.

Battery status Windows 8

Battery status Windows 8.

1. Checking the battery capacity through the command line

As the first method, I decided to consider the option of determining the battery capacity through the command line (i.e. without using third-party programs (by the way, I checked it only in the OS Windows 7 and Windows 8)).

Let's consider all the steps in order.

1) Run the command line (in Windows 7 through the START menu, in Windows 8 you can use the Win + R button combination, then enter the cmd command and press Enter).

2) Enter the command powercfg energy and press Enter.

If you get a message (like mine below) that the execution requires administrator privileges, then you need to run the command line under the administrator (more on this in the next step).

Ideally, a message about the system operation should appear, and then after 60 seconds. generate a report.

1-error, you need administrator rights

3) How to run command line as administrator?

Simple enough. For example, in Windows 8 go to the window with applications, and then right-clicking on the required program, select the launch item under the administrator (in Windows 7 you can in the START menu: also right-click on the command line and run as administrator).

2-running cmd as administrator

4) Actually, we enter the powercfg energy command again and wait.

A report will be generated in about a minute. In my case, the system placed it at: 'C: \ Windows \ System32 \ energy-report.htm'.

Now go to this folder, where the report is located, then copy it to the desktop and open it (in some cases Windows blocks the opening of files from system folders, so I recommend copying this file to the desktop).

2015-05-20 11_12_09-Administrator_ Command line

5) Next, in the open file, we find a line with information about the battery.

2015-05-20 11_14_52-energy-report.html

We are most interested in the last two lines.

Battery: Battery Details Battery Code 25577 Samsung SDDELL XRDW248 Manufacturer Samsung SD Serial Number 25577 Chemical Composition LION Long Life 1 Sealed 0 Estimated Capacity 41440 Last Full Charge 41440

Estimated battery capacity is the base, initial capacity set by the battery manufacturer. As the battery is used, its real capacity will decrease (the calculated one will always be equal to this value).

Last full charge – this indicator reflects the real capacity of the battery at the last moment of charging.

Now the question is, how do you know the wear and tear of a laptop battery, knowing these two parameters?

Simple enough. Let's just estimate it as a percentage using the following formula: (41440-41440) / 41440 = 0 (i.e., the degree of deterioration of the battery in my example is 0%).

Second mini example. Suppose we have the last full charge equal to 21440, then: (41440-21440) / 41440 = 0.48 = 50% (i.e., the degree of deterioration of the battery is approximately 50%).

2.Aida 64 / battery status detection

The second method is simpler (just press one button in the Aida 64 program), but it requires the installation of this program itself (besides, the full version is paid).

AIDA 64

Official website: http://www.aida64.com/

2015-05-20 12_21_00-AIDA64 _ The Ultimate System Information and Benchmark Tool

One of the best utilities for determining the characteristics of a computer. You can find out almost everything about a PC (or laptop): what programs are installed, what is in startup, what hardware is in the computer, how long has the BIOS been updated, the temperature of the devices, etc.

There is also one useful tab in this utility – power supply. Here in it you can find out the current state of the battery.

AIDA64 - battery rating

Pay attention first of all to indicators such as:

  • battery status;
  • capacity when fully charged (ideally should be equal to the nameplate capacity);
  • degree of wear (ideally 0%).

Actually, that's all. If you have anything to add on the topic – I will be very grateful.

All the best!

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