How to Charge Laptop Through USB Port (Yes, Really!)

How to Charge Laptop with USB

There are many ports on your laptop or notebook or any other computer mobile devices.

Majority of brands puts at least USB port and charging port.

But, does it possible to charge a laptop through USB?

The short answer is yes, the long answer is depending on the USB model.

Here is why.

First, you need to understand USB type

Since 1996, USB has at least three major evolutions.

You might already know, such as:

  • USB type A
  • USB type B
  • USB type C

USB type A (USB-A) is the most common USB interface today. Average laptop (except the extreme thin one) embed this port. It can connect devices and supply power for 5V and 500 mA. Laptop definitely cannot receive electricity supply from this port.

USB type B (USB-B) also known as micro USB is commonly used on mobile phones. It can obtain power from the station but it never arrived at the major laptop market due to an unpractical application.

USB type C (USB-C) is the latest generation of the USB port. It’s smaller than USB-B and can both supply and receive power. This port is available on some flagship smartphone and some high-end laptop.

In other words, you actually CAN charge your laptop through USB-C port and it’s fully reversible.

So, how to charge a laptop with USB?

How to Charge Laptop with USB

All you need is a laptop with USB-C port and USB-C male cable.

You can connect it with power bank or standard USB charger. As long it delivers right output on the suitable current.


Some smartphone also has a reversible charger, it means you can charger laptop using a smartphone

Yes, seriously!

However, this method is likely slower than using companion charger due to the limit of power.

I recommended you to only use an official charger. Some fake charger has a worse electricity output that can damage your device.

Always read the user manual before buy secondary charger.

“So, laptop with USB-A cannot charge using that port?”

Unfortunately, it’s impossible since USB-A is not designed in mind for it.

Although you buy USB-A to USB-C cable converter, it still won’t work.

Laptop with USB-C port charger support?

Flagship laptop that released after 2014 is most likely to featuring USB-C port, for charger and device connection. The USB-C can make laptop is thinner than ever before.

The well-known laptop with USB-C support:

In the coming year, more laptop with USB-C coming to the market with less price tag.

That way, charging laptop through USB port become something ordinary and absolutely possible!


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  1. Pingback: How to Charge a MacBook Pro With a USB? – USB Tip

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