How many watts does it take to charge a laptop

How many watts does it take to charge a laptop?

A laptop requires significantly less energy to charge than a desktop computer with an external monitor. This is because, on average, laptops are fully charged daily. Depending on the type of laptop, a full charge can require anywhere from 20 to 50 watts of energy.

Not all this energy adds to your laptop’s battery percentage; approximately 30 percent of this energy is consumed by heat emission and excess radiation. Your laptop only receives around 70 percent of the power necessary to charge it.

Always remember that the quality of the battery you are using determines whether your battery will charge properly or not. Consider that charging is an indicator of battery quality. If your laptop’s battery stops working, you must either replace the individual battery cells or purchase a new battery.

The time required to charge your laptop is directly proportional to the quantity of energy it will require.

Consequently, it is likely that a larger laptop, such as a notebook or tablet, will consume more power in sleep mode than a smaller laptop, which you can use normally.

Read Also: How Many Watts To Charge Laptop In Car | Let’s Find Out!

Factors affecting a laptop’s power consumption:

Although laptops are frequently purchased for their portability, they are commonly constructed with energy efficiency. However, depending on the laptop’s specifications, a few components may require additional power to function correctly.

In the absence of an external power source, a laptop’s power consumption may range between 20 and 100 watts. When a laptop is charged, its energy usage typically increases by 10 to 20 percent. Both of these factors can change according to the laptop’s components.

Many factors affect the power of laptops, but here I will describe the most important factors that affect laptop charging. The majority of the elements that affect laptop charging are mentioned below in their description. But if you still have any other problems with the laptop, put your question in the comment box.

1. Display:

The size, power, and type of your laptop’s display have a major impact on its energy consumption. A 14-inch laptop with a 6-hour charge may use 60 watts. As there is less screen to brighten, a laptop with a smaller screen, such as a notebook, may require less electricity, resulting in reduced energy consumption.

The brand of adapter you choose to power your laptop may also depend on the size of the display on your laptop. For example, a 15-inch laptop will include a 65-watt charger, while a 17-inch laptop will include a 90-watt charger.

This means that the amount of power your laptop consumes primarily depends on the size of its screen, as the quantity of energy supplied by your laptop charger is proportional to the size of your laptop.

2. CPU:

Your laptop’s central processing unit (CPU), also known as the processor. It will significantly impact its energy usage as it is the major part of any laptop. Without the CPU, your computer would be incapable of running any operating systems and consequently be inoperable.

The energy consumption of a laptop will undoubtedly increase. If you use programs that enable the processor to perform at a higher level. The processor will need to exert more effort to complete its responsibilities, leading your laptop to consume more power.

If you use any of these programs, your battery will likely drain considerably more quickly. And if you use your laptop while charging, it will probably take longer to charge.

3. Graphics Cards:

A graphics card’s presence will significantly impact your laptop’s power consumption. However, not all laptops include them. Because graphics cards boost the performance of games (and, consequently, their appearance), not all laptops incorporate them to save money and power. The majority of high-end and gaming laptops are equipped with graphics cards.

Typically, the main CPU is the only component in a laptop responsible for the graphics.

However, if your laptop also contains a graphics card, the rendering of your laptop’s visuals will be splitting between the main CPU and the graphics card, necessitating additional power to run the other component.

Therefore, a laptop with a graphics card will, on average, require a higher energy intake than a laptop without one.

Read Also: How Many Watts Does A Gaming Laptop Use? | Easy To Know!

Other Factors:

In addition to the factors that affects laptop power described above, there are a variety of other factors that might affect your laptop’s power consumption, such as playing music, utilizing the camera and microphone, downloading content, and internet usage (for example, streaming).

The power consumption of each laptop will vary based on the user’s specific laptop usage.

There is a high chance that your laptop consumes less energy if you use it for work or school than if you use it for gaming. However, the power consumption can vary within these categories depending on whether you are using your laptop while it is charging, how long you use it, and the power of the laptop’s components.

Regular use of a modern laptop can result in a power consumption of 60 watts or more. The graphics card is an essential component. Using a laptop with a graphics processor instead of just the central processor increases power consumption dramatically. Dedicated graphics cards are exclusive to high-end and gaming laptops.


I hope you get to know about How many watts does it take to charge a laptop? Examining the information printed on the bottom of your laptop can provide you with an estimate of its energy use.

Multiplying the number of volts indicated by the number of amperes listed will give a reasonable idea of your laptop’s power consumption. A laptop uses 10 to 20% more power when charging than when not. Thus you must also take this into account.

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