A fully functional battery is crucial, especially when you’re on the go and must use your laptop without access to a power outlet because laptops have become an integral part of our daily lives. The battery health of a laptop can be a significant concern for many users. Over time, laptop batteries lose their charge capacity and become unreliable. Manufacturers may estimate how long a laptop battery should last, but it’s only sometimes accurate as several factors affect its lifespan.

Ensure your laptop battery is in good condition by using a multimeter to check its voltage. A multimeter is essential for anyone who wants to test electronic devices’ electrical properties. This article will support you on how to check a laptop battery with a multimeter and identify if it needs replacement or just some maintenance tips to improve its performance.

How to Check a Laptop Battery with a Multimeter

How to Check a Laptop Battery with a Multimeter

Batteries store energy through voltage. It is an electronic tool for measuring electrical circuit voltage, current, and resistance. When using a multimeter, you check how much power is stored inside.

Before testing your laptop battery, please ensure it is turned off and detached from the power source and how much energy is stored inside.

A multimeter consists of two major parts – a dial and a scale. The dial allows you to select the function you want to measure, while the scale displays the measurement in numerical values.

You will need to gather equipment – a multimeter, which can measure voltage and amperage; a small screwdriver to remove the battery from your laptop (if necessary); and an understanding of how batteries work. Locate your laptop battery’s positive (+) and negative (-) terminals. These are usually marked by symbols or colours, with red denoting positive and black denoting negative.

Once you have found the terminals, attach the multimeter leads correctly: red lead goes to the positive terminal, while black information goes to the negative terminal.

How to inform If Your Laptop Battery Is About To Die

The most significant disadvantage of using a laptop is its battery life. We all know that a laptop’s battery life is not unconstrained; it has a limit and will eventually die out over time.

The first indicator that your laptop battery is dying is a decrease in overall performance. If you notice a significant drop in processing speed or the device takes longer than usual to boot up or shut down, then it’s likely that the battery needs replacement. Sudden shutdowns or reboots can be a sign of a failing battery.

Another way to tell if your laptop battery is on its last legs is by monitoring its charging time and duration. An old or faulty battery may take longer than usual to charge fully; once charged, it may only last briefly before running out of power again. If your laptop’s battery lasts only for half the time it used to stay previously, it could be because your laptop’s battery life has decreased, signalling that it may be time to get a new one.

Learn How to Connect Your Multimeter to Your Battery

How to Check a Laptop Battery with a Multimeter

It may seem daunting at first, but connecting a multimeter to your laptop battery is relatively simple, and every person can do it with some practice. These devices allow you to measure electrical circuit voltage, current, and resistance easily.

By connecting your multimeter to your laptop battery, you can take advantage of software that allows you to collect and examine data from your measurements. It makes it easier to diagnose problems and troubleshoot issues within electrical systems.

You need the required tools, such as a digital multimeter and an adapter cable. Ensure the laptop and the meter are turned off before connecting them. By doing this, any damage brought on by electrical shocks or short circuits will be avoided.

Make sure to use a multimeter

Make sure to use a multimeter and not an ohmmeter. An ohmmeter measures only resistance, while a multimeter can also measure voltage and current. This is especially important when dealing with laptop batteries because their charge levels fluctuate constantly. A multimeter will give you a more reliable reading of the battery’s current state.

Using an ohmmeter on a laptop battery can damage the device. Ohmmeters send high voltage levels through the circuit being measured, which can cause harm to delicate components like capacitors or diodes inside laptop batteries.

Make sure the terminals are clean.

One of the most common reasons laptop batteries fail to work is that they are dirty or corroded. That is why ensuring the terminals are clean before checking the laptop battery is essential.

How to Test Your Battery

How to Check a Laptop Battery with a Multimeter

Keeping track of your battery life is essential. A dead battery can be frustrating and may result in lost work. To avoid such situations, testing your laptop battery periodically is advisable. Use a laptop as a monitor while using high graphics on the test network because trying your laptop battery doesn’t have to be complicated or time-consuming; it’s a simple process that requires a few steps.

The first step in testing your laptop battery is to check its current charge level. Most laptops have an in-built tool that shows the percentage of charge remaining. This information helps you identify if the battery needs charging or replacement.

To check the charge level, click the power icon in your screen’s bottom right-hand corner. If the charge level is below 20%, consider charging it before proceeding with any tests.

If your laptop has a removable battery, please take it out and look it over for any signs of destruction, such as cracks or leaks. You can use soft fabric to clean the metal interaction on the battery and the computer port before reinserting it back into place.


Learning How to Check a Laptop Battery with a Multimeter can save you time and money in the long run. This article lets you determine whether your laptop battery functions correctly or needs replacing.

Remember to take safety steps, such as wearing gloves and working in a well-ventilated area when handling batteries. With this knowledge, you can extend the lifespan of your laptop battery and avoid unexpected shutdowns while working on essential projects.


What is the most significant way to check a laptop battery?

Use an external power meter to give you an accurate reading of the battery’s charge. 

What types of batteries can I test for a laptop?

The most usual type of battery is a Li-ion battery. Other types of batteries that can be tested for a laptop include NiCd, NiMH, and Lead Acid.

What should I do if the laptop battery starts to die?

If your laptop battery is low, you can recharge it by connecting it to the power outlet and using the AC adapter. You can also impose the battery by connecting it to a computer with a USB port. If those methods don’t work, you may need to replace the battery.

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