The battery is one of the essential components of a laptop, and every laptop user considers the health of the battery because the productivity of the whole work relies on the battery. But it is also true that checking efficiency is a technical process, and not all own that technique. And it is also true that the laptop’s battery wears out faster than the other laptop components.

You have to know when to replace the battery and minimize the chances of unwanted surprises; you should test the battery, which gets easy with the help of a multimeter. 

But most of you will ask how to test a laptop battery with a multimeter? Let’s explore how you can do this conveniently!

A Step Wise Process to Check Laptop Battery with Multimeter

To get the answer to the question of how to test a laptop battery with a multimeter? Have a look at this stepwise guide!

Step 1:

Charge Your Laptop Battery 

If you want to check the battery capacity of your laptop, then the first and foremost step in this regard is to charge the battery with the help of the charger altogether. Ensure that there is no issue with the charger and that the charger is working efficiently. 

Step 2:

Turn the Laptop Off and Remove the Battery 

Once you are sure that your laptop’s battery is fully charged, then unplug the laptop from the charger and turn off your laptop to remove the battery. Removing the battery is mandatory because you cannot test it without the laptop’s voltage being printed on the battery. You have to compare it with the voltage of the multimeter. Usually, the laptops have 9.6 V, 10.8 V, 11.1 V, 14.4 V, or 14.8 V, which may get higher or lower in the others. 

Step 3:

Locate the Connector 

The point where the battery interfaces with the laptop are known as a connector, and locating this point on the battery is mandatory. You do not have to go through some challenging processes for looking at the connector because it is mainly present near the side of the center of the battery. 

The connector is not very big because it is an inch in length and is quite similar to the exhaust fan grating of the laptop because it is designed like a series of 5 narrow and identical slots. The negative and positive terminals of the battery are at the outermost slots of the connector. 

Step 4: 

Turn On the Multimeter and Set the Voltage 

The next step is turning on the multimeter. After depending on the multimeter onset, the direct current voltage of the multimeter on 20 V or close to the 20 V where the lines indicate direct current voltage near the voltage setting and the voltage setting of the multimeter is denoted by V, and the alternative current voltage is represented by the wavy lines, so you also be clear about the sign of the direct or alternative current. 

Step 5: 

Insert the Prong of the Multimeter into the Slot of the Connector 

It has already been cleared that the battery has two outermost slots that are represented by the negative and positive charges, so you have to insert the two prongs of the multimeter into the slots of the connector of your laptop battery, and it does not matter whether you are matching the positives and negatives or not. And make sure the prongs are accurately connected with the metallic part of the slots. 

Step 6: 

Observe the Appeared Reading on Multimeter 

Suppose your laptop battery is healthy, has no charging issue, and can last longer than after connecting the slots and prongs. In that case, it will show a reading on the multimeter, which is very close to the reading already printed on the battery

Step 7: 

Compare the Battery Voltage 

Last but not least, compare the fully charged battery voltage and battery voltage after discharging almost 70 to 80% of the battery. If your battery suddenly drops to zero, it is a sign that your battery has worn out, and you have to replace it if you want your laptop.

Here are some top expert tips for testing a laptop battery with a multimeter:

  1. Safety First: Before you start testing, ensure your safety. Disconnect the laptop from any power sources, and handle the battery with care. Wear safety goggles and gloves if necessary, especially if you suspect a damaged battery.
  2. Use a Digital Multimeter: For accurate readings, use a digital multimeter (DMM) rather than an analog one. Digital multimeters are more precise and easier to read.
  3. Set the Multimeter Correctly: Select the DC Voltage (V) setting on your multimeter. If your multimeter has an auto-ranging feature, it will automatically detect the voltage range. Otherwise, set it to a range higher than the expected battery voltage.
  4. Calibrate Your Multimeter: Periodically calibrate your multimeter to ensure accurate readings. Most multimeters come with a calibration adjustment screw.
  5. Fully Charge Your Laptop: For accurate load testing, fully charge your laptop battery before performing the test. This ensures that the battery is at its maximum capacity.
  6. Disconnect External Devices: Remove any external devices connected to your laptop, such as USB devices or external hard drives, before testing. These devices can draw power and affect the test results.
  7. Test in a Controlled Environment: Perform the battery test in a controlled environment with stable temperature conditions. Extreme cold or heat can affect battery performance and test results.
  8. Record Baseline Data: Before you start testing, record the current battery voltage and capacity (if available) for future reference. This baseline data will help you track battery health over time.
  9. Perform Regular Tests: Make battery testing a routine practice, especially if you rely heavily on your laptop. Regular tests can help you detect battery issues early and take preventive measures.
  10. Understand Load Testing: Load testing involves simulating a real-world workload on your laptop to assess battery capacity. It’s essential to understand that the battery’s capacity can vary based on the load. Compare your load test results to the manufacturer’s specifications to assess battery health accurately.
  11. Consider Professional Help: If you’re not comfortable with performing load tests or interpreting results, consider consulting a professional technician or the laptop manufacturer’s customer support for guidance.
  12. Replace If Necessary: If your battery consistently shows low voltage or capacity, it may be time for a replacement. Laptop batteries have a limited lifespan, and continued use of a failing battery can lead to performance issues or even safety hazards.

Wrap Up 

A laptop’s battery is one of the weakest and most sensitive components that demands constant attention. If you find any inaccuracy with the charging time or any other charging issue, you must check the health of your battery, which can be quickly done with the help of a multimeter. Enjoy working with your laptop!