The power required to charge a laptop is far less than the power required to run a desktop PC with an external monitor. This is due to the fact that laptops are typically charged to 100 percent once a day on average.

According to the laptop you have, the amount of electricity required to charge it to full capacity can vary, but it is usually between 20 and 50 watts on average.

However, not all of this power is used up by heat emission and excess radiation, which reduces the percentage of battery life in your laptop. On average, roughly 30% of this energy is used up by heat emission and excess radiation. Therefore, only approximately 70% of the electricity required to charge your laptop is actually received by your laptop itself.

It is always vital to remember that the quality of the battery that you are using has a direct impact on how rapidly your battery charges.

The efficiency of your laptop’s ability to charge is affected by power consumption

The amount of time it takes for your laptop to charge is directly proportional to the amount of power that your laptop will need to use during the charging process.

If you are using a larger laptop, for example, there is a good probability that it will consume more power in standby mode even when it is not being used than a smaller laptop, such as a notebook or a tablet, while they are being used in their typical capacity View here how to keep your laptop cool all the time.

Factors That Can Affect The Power Consumption Of A Laptop

Despite the fact that laptops are frequently purchased for their portability, they are frequently developed with energy efficiency in mind. However, depending on the laptop’s specifications, there are a few components that may demand a greater amount of electricity in order to function properly.

When not connected to a power source, a laptop’s power usage might range anywhere from 20 to 100 watts depending on the model. When a laptop is charged, its power usage will typically increase by 10-20 percent, depending on the model. It is possible that both of these will differ depending on the individual components of a particular laptop.

The factors that affect the level of energy consumption the most are:

  • The size of the display
  • If there is a graphics card installed
  • The performance of the CPU (central processing unit)
  • The amount of RAM (Random Access Memory)
  • The type and amount of hard drives installed (Hard disk, SSD, or both)
  • Amount and size of fans

Other notable components when it comes to laptop power consumption are the WLAN module and touchpad.


A significant role in determining how much energy your laptop needs is played by the size, power, and type of screen that it has.

When used while charging, a laptop with a 14-inch screen may consume around 60 watts over the course of six hours. Because there is less screen to illuminate, a laptop with a smaller screen, such as a notebook, may consume less power because there is less screen to illuminate, resulting in lower energy consumption.

Furthermore, the size of your laptop’s display can have an impact on the sort of adapter you’ll need to use to charge your laptop. For example, a 15-inch laptop will come with a charger that is 65 watts, and a 17-inch laptop will come with a charger that is 90 watts.

Thus, the quantity of power that your laptop uses is mostly determined by the size of your laptop’s screen because your laptop charger will input more power into your laptop as the screen size increases.


Because it is the most important component of any computer, the central processing unit, also known as the processor, of your laptop will have a significant impact on its energy consumption. Your computer would not function if the Central Processing Unit (CPU) were not present since it would be unable to execute any operating systems and thus would not function.
Using programs that allow you to extract additional performance from your processor will surely result in your laptop consuming greater amounts of electricity. Due to the fact that the CPU will have to work extra hard in order to perform its functions, your laptop will consume more power as a result of this.

Use of any of these programs will almost certainly result in your battery draining considerably more quickly, and if you are using your laptop while it is charging, it will almost certainly take a little longer to charge.

Graphics Card

The availability of a graphics card will have a significant impact on the amount of power that your laptop consumes; however, not all laptops are equipped with one as standard.
Given that graphics cards boost game performance (and, as a result, make games seem better), not all laptops are equipped with them in order to save on costs and power usage. Graphics cards are mostly found in high-end and gaming laptops, as well as in desktop computers.

Visuals cards consume more power because the main processor is typically the only component responsible for the graphics on a laptop computer.

Alternatively, if your laptop is equipped with a graphics card, the rendering of your laptop’s visuals will be divided between the main CPU and the graphics card, resulting in the requirement for additional power to run the additional component.

Because of this, on average, a laptop with a graphics card will use more energy to operate than a laptop without a graphics card.

Other Factors

Additionally, there are a variety of additional aspects that might influence the power consumption of your laptop, like playing music, utilizing the camera and microphone while recording videos or audio, if you are downloading anything, and how you interact with the internet while using your laptop (for example, streaming).

The way a laptop is used will vary depending on the user, and hence the power consumption of each laptop will differ.

While it is likely that you will consume less energy if you use your laptop for work or educational purposes, this is not always the case. The amount of energy consumed by your laptop can vary depending on whether or not you are using your laptop while it is charging, how long you use it for, and the power of its components.

Final Words

It is difficult to predict how much energy a laptop will consume in advance; nevertheless, you may obtain a general idea by glancing at the information written on the bottom of your laptop. The power consumption of your laptop can be approximated if you multiply the number of volts listed by the number of amperes provided in the specifications.

It is also crucial to consider that when a laptop is charging, it will consume approximately 10-20 percent more energy than when it is not connected to power, thus this should be taken into consideration.

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