How to Test Laptop Battery with Multimeter

A multimeter is an important tool for anyone who needs to test electronics, as it allows you to check the voltage, current, resistance, capacitance, and continuity of a device. It’s also a great tool for DIY enthusiasts, as you can use it to test your car battery, car alternator, and other electrical components.

In this article, we will discuss how to test laptop battery with multimeter. We will cover different types of laptop batteries and how to test them with a multimeter.

How to Test Laptop Battery with Multimeter

The battery is the most important part of a laptop because it keeps the computer running. Without a fully charged battery, the computer will not start or will be unable to finish its task. You can buy a battery charger, but that will not be the best way to test the battery. Read this article How Much Does It Cost To Replace a Laptop Battery?

When you need to test a laptop battery, you need to use a multimeter to measure the voltage, current, and capacity of the battery. You can use a multimeter to measure the voltage of the battery, current, and capacity of the battery. In this post, I will show you how to test a laptop battery.

You need to know how to test the battery so that you don’t get surprised by an unexpected power outage. A multimeter is one of the most useful tools for testing batteries. Which gets easy with the help of a multimeter. 

Follow this setups

  • Charge Your Laptop Battery
  • Turn the Laptop Off and Remove the Battery 
  • Locate the Connector 
  • Turn On the Multimeter and Set the Voltage 
  • Insert the Prong of the Multimeter into the Slot of the Connector 
  • Observe the Appeared Reading on Multimeter 
  • Compare the Battery Voltage 

Compare the Battery Voltage

We need to first understand the voltage of a battery. If the voltage is too high, it is not a good sign. In case, the voltage is too low, we may need to replace the battery. You can use your multimeter for this purpose. The batteries should be replaced when they have lost half of their capacity.

The next step is to compare the voltage of the battery with its nominal voltage. The nominal voltage of the battery is usually printed on the battery’s packaging. We should compare the voltage of the battery with this nominal voltage. If the voltage is lower than the nominal voltage, then we should replace the battery. Otherwise, we can carry on using the battery.

Observe the Appeared Reading on Multimeter

Before you can observe the Appeared Reading on the Multimeter, you have to observe the reading on the meter. The meter will show either “DETECTED” or “NOT DETECTED”. It indicates that the battery is dead or the battery is present. You have to make sure that the reading is shown “DETECTED” in the battery test mode. The battery has to be connected to the multimeter as well. Read this article Why Do Some Websites Make My Laptop Overheat

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

You will need to insert the Prong of the Multimeter into the slot of the battery.

First, turn the laptop on. After turning on the laptop, the battery LED should light up. The first step is to insert the prongs of the multimeter into the slots of the connector.

Second, connect the positive (+) probe and the negative (-) probe. The multimeter should indicate a reading between 9 and 12 volts.

Third, turn off the laptop. If the battery indicator lights up, the battery is charged. If the battery indicator does not light up, the battery is dead.

Turn On the Multimeter and Set the Voltage

When using the multimeter for testing laptop batteries, you need to know the voltage level in the battery. Set the voltage to the level of the battery. Connect the multimeter to the battery, and turn on the multimeter. Then wait for several seconds for the voltage to stabilise. Use the “V” setting and measure the battery voltage in millivolt (mV). It will read as milli-volts (mV) or micro-volts (µV). The battery voltage varies between 10V to 14V.

The voltmeter is used to measure the amount of electricity in an electric circuit. To measure the voltage, you must first connect the voltmeter to the device.

Locate the Connector

First, locate the connector. Connectors are found at the back of the laptop. There should be a connector marked with a small square. Connectors are used for recharging the battery. You should check whether the connector is disconnected or not.

Next, insert the probes into the two battery terminals. The probes are usually connected to the positive (+) and negative (-) ends of the battery. If you are unsure which terminal is which, consult the instruction manual. You can test the capacity of the battery by measuring the voltage with the multimeter. You can check the remaining time by reading the LED. Make sure that the current doesn’t exceed a safe level. Otherwise, you may get damaged. Read this article What Are Some Good Drawing Apps For Laptop In 2022

Turn the Laptop Off and Remove the Battery

You need to turn off your laptop. You must remove the battery too. When the battery is removed, open the power button so that it gets disconnected. When you turn off your laptop, you must unplug it completely. You should remove the battery as soon as you turn off the laptop. You should disconnect the power button before unplugging the laptop.

If you do not follow the steps correctly, you could damage your laptop. When you remove the battery, you must remove the back cover of your laptop. You should pull it out gently. When you are done removing the battery, you must plug it in again and close the back cover. You should leave the laptop to stand for a while.

Charge Your Laptop Battery

For the most part, it’s pretty simple to charge a laptop battery. When the power is turned on, your battery is charged. When the laptop is turned off, the battery is fully charged. There are a few exceptions though. For instance, if you forget to turn the power off after charging, the battery will be overcharged. Overcharging will damage the battery, but it may not show up in the testing process. So make sure that you keep an eye on your laptop while charging. Read this article Why Does My Hp Laptop Keep Disconnecting From WiFi?

Frequently Asked Questions

How do I know if my laptop battery is bad with a multimeter?

You can tell if your laptop battery is bad by using a multimeter. A multimeter is a device that can measure the resistance of the battery. In other words, it can measure the amount of electricity that is available in the battery. If the battery’s resistance is high, the battery is probably dead.

How can I test my laptop battery?

You can test your laptop battery by plugging it into an outlet and then turning on the power switch. If it doesn’t power on, it’s time to replace it.

Laptop batteries will lose their charge over time, so it is best to keep them in a cool environment. You can also test your battery by plugging it into a power source and see how long it takes for the laptop to turn on. If it takes a long time to turn on, you may need to replace the battery.

How do I check if my laptop battery is bad?

Laptops use batteries, which are usually in the form of AAA or AA cells. Check the label on the back of the laptop. If the battery is not labelled, you can try to replace it with a new one.

How do you check if a battery is good with a multimeter?

You can use a multimeter to test the capacity of a battery. A good battery should have a reading of at least 2 volts. If the reading is below this, then the battery is not good.


In conclusion, it’s important to test your laptop battery periodically. If your laptop battery is not working properly, you can replace it. If your laptop battery is damaged, you can replace it. It is recommended that you test your laptop battery every six months to ensure that it is functioning properly.

So, in this post we have shown you how to test laptop battery with multimeter. I hope this article is very informative for you, for more information you can read more articles on this website. Thank you for reading my blog!

With almost 8 years experience in the PC hardware industry, Leo is happy to share his expertise with you. He writes about what is the best technology on the market, mostly about the laptops. He's also gaming enthusiast and spent his spare time on his gaming PC.

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