Calibrate laptop battery: Here’s how to do it

3 min

The battery is not working properly, so throw it in the trash? This is often neither necessary nor sustainable. We explain to you how you can calibrate the laptop battery and what advantages this has.

From André Gabriel

Home office is becoming increasingly popular. From the employer’s point of view, too, occasionally working at home is a sensible alternative to everyday office life, which can also have a positive effect on employee motivation. If you want to be even more flexible, grab your laptop and take a seat in the café around the corner – if the battery power display is okay, because sockets are not always nearby.

Why should I calibrate the laptop battery?

An intact battery is the basic requirement for mobile work – if the displayed charge status is incorrect, important files can be lost in the worst case. But before you dispose of the energy storage device because it apparently no longer works properly, we recommend: Calibrate the battery. This may save money and resources, because in many cases calibrating the battery solves small problems and you can then use the device normally again.

With these (mostly apparent) problems, we recommend calibrating the laptop battery:

  • No energy despite sufficient battery level
  • Battery discharges unusually quickly
  • No charging, although the battery is receiving power

Calibrating a battery does not directly improve its running time, it only corrects the display. Therefore, the basic tip for handling a laptop battery is: calibrate it before using it for the first time to ensure optimal use right from the start. Nevertheless, the mentioned inconsistencies can occur in the course of use.

What are my options?

laptop battery

Don’t worry: you don’t have to remove the battery from your laptop to calibrate.

Let us summarize the theory: Since batteries normally lose capacity with each charging cycle, a correct display of the charge level is elementary. Otherwise, for example, we will charge the energy storage device even though it still has enough energy and break the efficient charging rhythm.

The good news: You don’t have to send the battery in and have it calibrated for a fee. There are several ways you can realign the rechargeable battery yourself. You either use safe mode, calibrate the laptop battery using a tool or software, or choose a special procedure if you are using Windows 10.

A fourth option is to calibrate the battery via BIOS or UEFI. However, only professionals should put their hands on the “nervous system of computers”, so we only mention the variant for the sake of completeness.

The easiest: the manual method

No software, no specialist knowledge. If you want to calibrate the laptop battery manually, all you need is the laptop and battery, the power supply unit and a little patience. Thats how it works:

  1. Make sure the battery is fully charged.
  2. Reboot the laptop.
  3. Press the F8 key several times when starting up the laptop.
  4. Wait for a black and white menu to open.
  5. Select “Safe Mode” or “Startup in Safe Mode”.
  6. Unplug the power.
  7. Wait until the battery is completely discharged.

Depending on the device, it may take some time to discharge the battery. Practice your patience here. The laptop battery is only calibrated when the laptop shuts down because it no longer has any energy. The power storage display should now function normally.

Calibrate laptop battery using a tool

Software can be used to calibrate the laptop battery. A corresponding data carrier with an installation file is often included in the scope of delivery of the device. In some cases, the software is already installed on the hard drive – this applies above all to OEM (Original Equipment Manufacturer) devices.

As soon as the software is installed on the laptop, you start it and follow the instructions of the program. The rest is done automatically.

Calibrating the battery in Windows 10

If you want to calibrate the battery with a Windows 10 laptop, you can supplement the manual method with special settings in the operating system’s power plan:

  1. Right-click on the Windows icon in the lower left corner.
  2. Select “Search”.
  3. Type “edit power plan” into the search box.
  4. Click on the corresponding result.
  5. Select “Never” under “Turn off the screen”.
  6. Select “Never” under “Sleep mode after”.
  7. Click on “Change advanced power settings”.
  8. In the new window, select “Shut down” under “Action in case of critical battery capacity”.
  9. Define “5%” for “Critical battery capacity”.

After the changes in the energy saving plan, the battery drains as quickly as possible because the laptop remains in operation when it is not in use. Up to a battery charge of 5% – only then does the system shut down.

Then switch to the manual version and fully charge the battery. At 100 percent you disconnect the laptop from the power source and let the battery discharge – you can use the device normally during this time if you want. Did the laptop shut down automatically? Then you reconnect it to the power supply unit to fully charge it and to finally calibrate the laptop battery.


  1. Sometimes the actual charge level and the charge indicator of batteries do not match.
  2. Instead of replacing a battery in the event of problems, it should first be calibrated.
  3. When calibrating manually, the battery is fully charged and then discharged again.
  4. Automatic calibration using the software supplied or preinstalled is also possible.
  5. If you calibrate the battery in Windows 10, you change the settings in the energy savings plan beforehand.


Passionate about DIY for over 10 years and all the new tools, I give you through this blog all my advice, tips, tests in all areas: carpentry, electricity, masonry, gardening, home automation ...


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