Can a Monitor Charge a Laptop Over USB-C?

A monitor charges a laptop through USB-C only when its port supports Power Delivery. A USB-C connector by itself doesn't guarantee charging, since USB-C can carry video and data without sending enough power to run a laptop.

Check three things before connecting:

The laptop supports charging through the USB-C port you'll use.
The monitor's USB-C port provides Power Delivery, with a stated wattage.
The cable supports the monitor's power output and video connection.

The monitor also needs its own power connection. USB-C carries power from the monitor to the laptop; the laptop doesn't normally power the monitor in this setup.

If you're comparing display connections, our guide to USB-C vs HDMI for a monitor explains what each connection can carry. HDMI can carry video and audio, but it doesn't provide the same single-cable laptop charging setup.

How do you check whether the power is enough?

Compare the monitor's USB-C Power Delivery output with your laptop's charging needs. Find the recommended charger wattage in the laptop's manual or specifications, then check the monitor's USB-C output.

A match gives you a better chance of charging at a normal rate while you work. If the monitor supplies less power than the laptop needs, it may charge slowly, hold its battery level, or drain during demanding tasks.

The Dell S2725DC provides up to 65W of USB-C Power Delivery. That makes it a possible fit for a laptop whose charging needs are within that output.

The number alone doesn't confirm compatibility. Check the laptop's USB-C charging requirements and confirm that the monitor's port is the one that delivers power.

A monitor with a higher output can also work with a laptop that needs less power. The laptop draws what it supports; a larger wattage figure doesn't mean the monitor forces that amount into the device.

What if your laptop needs more power than the monitor provides?

Use the laptop's own charger if the monitor's output falls short. A lower-power monitor may still work for video, but it might not keep the laptop charged during use.

For example, the Dell S2725DC's 65W output may not be enough for every laptop. Check the laptop maker's recommendation, especially if you run demanding software or connect other devices.

Don't assume a charging icon means the setup can keep up indefinitely. Check the battery level after working for a while, and switch to the dedicated charger if it continues to drop.

Does your laptop's USB-C port support charging?

The laptop must accept power through the USB-C port you're using. Some laptops have USB-C ports for data or display only, while others support charging through one or more specific ports.

Look for charging or Power Delivery details in the laptop manual. Port icons can offer a clue, but the manual or manufacturer specifications are the clearer source when several USB-C ports look alike.

If the laptop has no USB-C charging support, connecting it to a USB-C monitor won't replace its power adapter. You may still be able to use another supported connection for video.

For a complete desk setup, see how to set up dual monitors with a laptop. That guide covers display connections as well as the way the screens fit into a laptop workspace.

Which cable should you use?

Use a USB-C cable rated for the monitor's power output and video connection. A cable that fits the port may still have limits on power or data.

The Dell S2725QC includes a USB-C to USB-C cable rated for 100W and 10Gbps. The monitor itself supports up to 65W Power Delivery, so the cable's higher rating doesn't increase the monitor's power output.

The ASUS ProArt PA278CV has a USB-C port with 65W Power Delivery and includes a USB-C cable. Its listed details don't state the cable's power rating, so check that it supports the power your laptop needs.

If you're buying a replacement cable, check its power rating and confirm it supports the video connection you plan to use. Avoid relying on a charging-only cable if you need the same cable to carry a display signal.

Which USB-C monitors in this guide can charge a laptop?

All 4 monitors here list USB-C Power Delivery, with stated outputs ranging from 65W to 90W. Confirm the wattage your laptop needs before choosing among them.

The LG 27UP850K-W provides up to 90W through USB-C for data transfer and power delivery. That higher output may suit a laptop that needs more than 65W, provided the laptop supports USB-C charging.

The Dell S2725DC, Dell S2725QC, and ASUS ProArt PA278CV each provide up to 65W. The Dell S2725QC includes a 100W-rated USB-C cable, while the ASUS and Dell S2725DC include USB-C cables without a stated power rating in the available product details.

These wattage figures describe the monitors' stated USB-C power output. They don't confirm that every laptop will charge at the same rate, so check your laptop's port and power requirements too.

Can a USB-C monitor charge a laptop and display video at once?

Yes, one USB-C connection can carry video and power at the same time when the laptop, monitor port, and cable support those functions. This is the main benefit of a USB-C monitor for a laptop desk.

Connect the laptop to the monitor's USB-C upstream port with a suitable cable. If the screen appears but the laptop doesn't charge, check that you used the monitor's Power Delivery port and that the laptop's port supports charging.

Some monitors also have USB ports for accessories. Those ports may serve a different purpose or supply less power, so use the connection identified for the laptop rather than assuming every port has the same output.

A USB-C connection can also help reduce cables on your desk. If you need to connect more than one computer or share peripherals, our guide to what a KVM monitor is explains when that feature matters.

What should you do if the laptop doesn't charge?

Check the port, cable, and power output first. These are the common points to verify when a USB-C monitor shows a picture but doesn't charge the laptop.

Confirm that the laptop's connected USB-C port supports charging.
Connect to the monitor's USB-C port that provides Power Delivery.
Check that the monitor is powered on and connected to its power source.
Use a cable rated for the monitor's output and the required video signal.
Compare the monitor's wattage with the laptop's recommended charger.

If the laptop charges only when asleep or idle, the monitor may not provide enough power for its workload. Use the laptop's charger for demanding tasks or choose a monitor with a suitable output.

Is USB-C charging worth choosing in a monitor?

Choose a USB-C monitor if its power output matches your laptop and you want one cable for power and video. If the laptop needs more power, or doesn't support USB-C charging, a monitor's USB-C port may not replace its charger.

The ASUS ProArt PA278CV and Dell S2725DC each provide up to 65W, while the Dell S2725QC also provides up to 65W and includes a 100W-rated cable. The LG 27UP850K-W provides up to 90W.

For other laptop monitor features and options, see our guide to the best monitors for a laptop home office. Match the monitor's Power Delivery output to your laptop's charging needs, then confirm that the USB-C port and cable support the connection.

Frequently asked questions

Can every USB-C monitor charge a laptop?

No. A USB-C port may carry video or data without providing laptop charging.

Check the monitor's specifications for USB Power Delivery and its wattage, then confirm that your laptop accepts charging through its USB-C port.

How many watts does a monitor need to charge a laptop?

The right amount depends on your laptop. Compare its recommended USB-C charger wattage with the monitor's Power Delivery output; a lower-wattage monitor may charge slowly or fail to keep up while the laptop is under heavy load.

Can I use a USB-C monitor and a separate laptop charger?

Yes. You can connect the monitor for video and use the laptop's own charger if the monitor does not support charging or supplies too little power.

Check your laptop instructions for supported ports and charging methods.

Does a USB-C cable affect laptop charging from a monitor?

Yes. Use a USB-C cable that supports the needed power and video connection.

Some USB-C cables handle data or charging at limited levels, so check the cable's rated power and the monitor's included cable details.

Can a Monitor Charge a Laptop Over USB-C?