How Many Watts To Power A Laptop? [April 2022]

A laptop needs a good and compatible power source to charge up the battery. Let’s found out, how many watts to charge a laptop?

How many watts to charge a laptop?

It all depends on how many watts (power) your laptop needs. The average wattage for a laptop is typically 40w.

But the appropriate wattage varies depending on what you’re using your laptop for.

If you’re checking email and surfing the web, 20w should be enough.

If you’re doing intensive activities like playing video games or editing videos, up to 100w will be required.

An important thing to remember is that most laptops won’t allow power exceeding 100-200 watts total to stay plugged in all at once.

What type battery is inside my laptop?

A lithium-ion battery typically powers laptops. But the battery doesn’t always supply the full power required to run the laptop’s circuits.

As a result, your laptop will supply power from both its internal battery and AC adapter simultaneously.

Also, note that while power requirements will vary depending on what you’re doing with your laptop, it’s not uncommon for some laptops to draw more than 125w at all times, even when inactive (while sitting on standby).

As a result, you must be certain that you are purchasing a high-quality laptop AC adapter to ensure maximum compatibility between your notebook and charger.

What is the average life span of a laptop battery?

The average life expectancy of a laptop battery is typically 300-500 cycles.

However, there are a lot of variables at play, including how often you charge it and what kind of power source you’re using.

Also, what type of work are you doing on your laptop battery.

Output and Input power

It’s important to check the adapter’s output capacity because each brand can supply a slightly different amount of voltage.

For example, a laptop might state “45v” as its output capacity, but if you use an adapter that offers only 40v, you will see a power difference.

It would be best if you matched the total wattages between your charger and your laptop, or else you’ll overheat your laptop.

Most laptops have an internal fan that helps cool down the internals of your computer when it becomes too hot.

This is important because excessive heat can be detrimental to the delicate electronics of your laptop.

Laptop AC adapters have an input voltage (AC voltage) of between 100v and 240v. In the US, this is typically 110v, 120v, or 220v.

The higher the input voltage of your AC adapter, the greater amount of power your laptop will receive from it.

Checking Support Manual

Most laptops have only one connector (power connector) since they run on one power source only.

However, some laptops may take up to three connectors (power cord). If you’re unsure which kind of power supply your laptop takes, look at its documentation or check out its website.

You can often find this information in a place called a “support manual.”

We hope this article has helped you determine how you need to charge your laptop and how many watts to power a laptop.

Moatsim
Moatsim is a tech content writer. Writing is his passion and loves writing about laptop reviews & tech with in-depth research!