You have a laptop with a nearly dead battery, your charger isn’t around, and there’s an HDMI cable sitting next to the TV.

Can that HDMI cable save the day?

No—not by itself. A standard HDMI connection cannot charge a laptop.

That’s the important part many older guides get wrong.

HDMI does carry a small amount of electrical power, but that power exists primarily for HDMI signaling and, on newer equipment, for powering certain active HDMI cables. It is nowhere near what a laptop battery needs.

There are, however, two setups involving HDMI equipment that can charge a laptop. In both cases, the laptop is actually receiving power through USB-C Power Delivery (USB PD) rather than HDMI.

Here’s exactly how it works.

Quick Answer: Can You Charge a Laptop Through HDMI?

You cannot charge a laptop directly through its HDMI port.

A standard HDMI source provides only a tiny 5-volt supply. Even HDMI Cable Power, a newer HDMI feature intended to power active HDMI cables, allows a cable to draw up to 300 mA at 5 volts—about 1.5 watts. That’s for the cable itself, not for charging a laptop. HDMI.org

By comparison, Microsoft’s current Surface Laptop models may require around 39–45 watts minimum and 60 watts for recommended fast charging, while many other laptops use even higher-power adapters. Microsoft Support

That’s not a close comparison:

Power source	Approximate available power	Suitable for laptop charging?
Traditional HDMI 5V signaling supply	Around 0.25W at the normal sink limit	No
HDMI Cable Power	Up to 1.5W	No
USB-C laptop charger	Commonly tens of watts or more	Yes
USB Power Delivery 3.1	Up to 240W maximum	Yes, with compatible hardware

USB Power Delivery was specifically designed for devices requiring substantial power and currently supports up to 240W over compatible USB-C hardware.

So when someone says they’re “charging a laptop through HDMI,” there is usually something else in the setup supplying the power.

Why HDMI Cannot Normally Charge a Laptop

An HDMI cable is primarily designed to transport:

digital video + digital audio + control/signaling data

It was never designed as a high-power laptop charging interface.

HDMI does include a 5V power line. On conventional HDMI implementations, however, that line supplies only a very small amount of current. HDMI’s newer Cable Power feature can supply additional power, but HDMI.org describes its purpose as powering active HDMI cables directly from the source device.

Your laptop battery needs dramatically more power.

There is another problem: the HDMI connector on most laptops is an output, not a charging input.

Plugging a TV’s HDMI port into your laptop’s HDMI port does not suddenly turn either connector into a laptop power input.

No charging negotiation takes place, and your laptop’s charging circuitry isn’t connected to HDMI in the way it is to its USB-C, MagSafe, Surface Connect, or barrel charging port.

Method 1: Use a USB-C Hub With HDMI and Power Delivery

This is probably what most people actually mean when looking for how to charge a laptop with HDMI.

You’re not charging through HDMI.

Instead, you’re using an adapter that handles HDMI video and USB-C charging at the same time.

What You Need

You need:

A laptop that supports charging through USB-C
A USB-C hub or HDMI adapter with a USB-C PD input
A compatible USB-C Power Delivery charger
A USB-C cable rated for the required wattage
An HDMI cable if you also want to connect a TV or monitor

The adapter may have ports labeled something like:

HDMI | USB | PD | SD

The important one for charging is PD, sometimes labeled PD IN, USB-C Power, or Power Delivery.

How to Connect It

The connection should look like this:

Wall outlet → USB-C PD charger → PD port on hub → USB-C connection → Laptop

For video:

Hub → HDMI cable → TV or monitor

So one USB-C connection to your laptop can potentially handle both charging and video output.

Step 1: Confirm Your Laptop Supports USB-C Charging

Do this before buying an adapter.

Having a USB-C connector does not automatically mean the laptop can charge through it.

USB-C is only the connector shape. The features supported by that connector vary by computer.

For example, Dell documents current laptop models where certain USB-C ports support data only, while other implementations support video and Power Delivery. Dell recommends checking the exact model’s specifications or owner’s manual.

Check your manufacturer’s specifications for terms such as:

USB Power Delivery, PD charging, USB-C charging, or Thunderbolt charging.

Step 2: Check Your Laptop’s Required Wattage

Look at the original charger or manufacturer documentation.

You might see something similar to:

45W
65W
90W
100W
140W

The replacement charging setup should meet the laptop manufacturer’s requirements.

Using an underpowered charger may result in:

Very slow charging
Battery percentage dropping while plugged in
A “slow charger” warning
The laptop refusing to charge

Apple, for example, recommends using a USB-C adapter with wattage equal to or greater than the adapter recommended for the Mac model.

Step 3: Connect Power to the Hub

Plug your USB-C charger into the hub’s PD input, not its ordinary USB-C data port.

Then connect the hub’s main USB-C cable to the laptop.

If both your laptop and hub support USB Power Delivery, charging should begin.

Step 4: Connect HDMI Separately

Now connect the hub’s HDMI port to your monitor or TV.

At this point:

USB-C PD is charging your laptop.

HDMI is carrying the video signal.

That’s an important distinction.

One Detail People Often Miss

A “100W” USB-C charger does not automatically mean the laptop receives the full 100W through every hub.

Some hubs reserve power for their own electronics and connected accessories.

Always check the hub manufacturer’s maximum pass-through charging output, not just the wattage printed on your charger.

Method 2: Charge Through a USB-C Monitor or Powered Dock

There’s another setup that can create the impression that the display connection is charging the laptop.

A modern monitor or docking station may deliver power to a compatible laptop through USB-C or Thunderbolt.

The setup looks like this:

Wall outlet → Monitor/Dock → USB-C or Thunderbolt → Laptop

The same connection may provide:

Laptop charging
Video
Audio
USB data
Ethernet
Connected accessories

USB-IF specifically lists a wall-powered monitor charging a laptop while displaying video as a USB Power Delivery use case.

Apple also confirms that compatible USB-C or Thunderbolt displays can provide charging power to supported Mac laptops.

Again, HDMI is not the charging technology here.

If you connect the laptop to that same monitor using only an HDMI cable, the laptop generally won’t charge.

You need the monitor’s USB-C/Thunderbolt port with Power Delivery support.

HDMI vs. USB-C Power Delivery: Why They’re So Different

This is where the confusion usually ends.

Feature	HDMI	USB-C Power Delivery
Main purpose	Audio/video	Power + data + optional video
Charges laptops directly	No	Yes, if supported
High-power negotiation	No laptop-charging negotiation	Yes
Modern maximum power	HDMI Cable Power up to roughly 1.5W for active cables	USB PD up to 240W
Video support	Yes	Yes on compatible ports
Common laptop charging interface	No	Yes
Can connect monitor and charge simultaneously	Not through HDMI alone	Yes with supported monitor/dock

USB Power Delivery also allows the devices to negotiate appropriate power levels rather than simply placing a fixed voltage on a connector. That’s one reason it can safely support equipment ranging from small electronics to high-powered laptops.

What About HDMI Cable Power?

This feature creates some understandable confusion.

Modern HDMI specifications include HDMI Cable Power, which lets compatible HDMI source devices provide additional power directly through the HDMI connector.

So doesn’t that mean HDMI can charge something?

Technically, HDMI can supply power.

But not the kind of power your laptop needs.

HDMI.org states that HDMI Cable Power can provide up to 300 mA from the 5V supply, which works out to approximately:

5V × 0.3A = 1.5W

Its purpose is to eliminate the extra USB power lead sometimes required by long active HDMI cables.

Compare that with a laptop needing 45W:

HDMI Cable Power: 1.5W
Example laptop requirement: 45W

That’s roughly a 30× difference before even considering laptops that require 60W, 100W, 140W, or more.

So HDMI Cable Power does not turn HDMI into a laptop charging standard.

Will an HDMI-to-USB-C Adapter Charge a Laptop?

Usually, no.

This is another common misunderstanding.

A basic USB-C-to-HDMI adapter is normally designed to take a video signal from a USB-C device and send it to an HDMI display.

That does not mean electrical power can travel backward through the adapter into the laptop.

What you need is a USB-C hub or adapter specifically designed with:

USB-C Power Delivery pass-through

The difference matters.

Basic USB-C-to-HDMI Adapter

Laptop → USB-C adapter → HDMI → Monitor

Video: Yes

Laptop charging: No

USB-C HDMI Hub With PD Input

Charger → USB-C PD input → Hub → Laptop

and simultaneously:

Laptop/Hub → HDMI → Monitor

Video: Yes

Laptop charging: Yes, if the laptop and hub support it

The charger—not HDMI—is providing the energy.

Can a TV’s HDMI Port Charge a Laptop?

No, not in the normal sense.

Connecting:

TV HDMI → Laptop HDMI

will not recharge the laptop battery.

A television may provide the small voltage required by the HDMI system, but the laptop’s HDMI circuitry is not designed to accept it as battery-charging power.

If you’re in a hotel room with a dead laptop, a TV and an HDMI cable, HDMI alone isn’t a workable emergency charger.

Can You Charge a Laptop Through USB-C Instead?

Often, yes—and this is the option you should investigate first.

Many modern Windows laptops, Chromebooks and MacBooks support USB-C charging.

But again:

USB-C connector ≠ guaranteed USB-C charging

Check the laptop’s specifications.

Microsoft, for example, recommends a USB Type-C Power Delivery charger for Surface devices that support charging over USB-C and notes that an underpowered charger may charge slowly or not at all.

How Much USB-C Power Do You Need?

Use the laptop manufacturer’s recommended wattage whenever possible.

As a rough buying decision, don’t choose a charger merely because it physically fits.

Check:

Laptop charging requirement → charger output → cable rating

All three matter.

USB-IF currently distinguishes certified USB-C cables by power capability, including 60W and 240W cable ratings.

If your laptop needs more than 60W, don’t assume every USB-C cable in your drawer is appropriate.

What If Your Laptop Has HDMI but No USB-C Charging?

Then HDMI is not your workaround.

Use one of the charging methods officially supported by that laptop.

That may be:

The manufacturer’s replacement AC adapter
A compatible barrel-plug charger
A proprietary charging connector
A compatible DC or travel charger approved for the laptop
A laptop power bank that supports the correct charging interface and electrical requirements

Don’t try to force HDMI, USB-A, or an arbitrary adapter into becoming a laptop charger.

The connector fitting physically does not guarantee electrical compatibility.

Is It Safe to Try Charging a Laptop Through HDMI?

A normal HDMI cable simply isn’t designed to charge the laptop, so there should be no reason to experiment with improvised wiring or unverified “HDMI charging” adapters.

Avoid adapters that promise unusual power conversions without clearly stating:

USB Power Delivery support
Input voltage
Output voltage
Maximum wattage
Compatible devices
Required charger wattage

Incorrect voltage, poor-quality adapters, or noncompliant cables can create unnecessary risk for the laptop and its battery-management electronics.

The safest rule is simple:

Use a charging input your laptop manufacturer actually designed for charging.

The Safest Alternatives When You’ve Lost Your Laptop Charger

If the original charger is unavailable, use this order of preference:

Option	When it makes sense	Recommended?
Manufacturer replacement charger	Almost any laptop	Best option
USB-C PD charger	Laptop supports USB-C charging	Excellent
USB-C PD power bank	Travel/emergency use	Good if wattage is sufficient
USB-C monitor with PD	Desk setup	Excellent
Powered USB-C/Thunderbolt dock	Desk/workstation	Excellent
Compatible replacement barrel charger	Older laptops	Good if voltage/polarity match
HDMI cable	Any laptop	Not a charging solution

Common Mistakes to Avoid

Assuming every USB-C port can charge the laptop

Some USB-C ports support only data. Others support video but not charging.

Check the manual.

Buying a USB-C-to-HDMI cable and expecting reverse charging

Most are intended for video output, not power delivery.

Using a charger with insufficient wattage

The laptop may charge slowly, refuse to charge, or continue losing battery while being used.

Confusing HDMI Cable Power with laptop charging

HDMI Cable Power exists primarily to power active HDMI cables, not laptop batteries. HDMI.org

Assuming a monitor charges through HDMI

A monitor that charges a laptop usually does so through its USB-C or Thunderbolt connection, not HDMI.

FAQs About Charging a Laptop With HDMI

Can you charge a laptop with an HDMI cable?

No. A standard HDMI cable cannot directly charge a laptop battery. HDMI’s small power supply is intended for HDMI functions and, on supported hardware, active HDMI cables—not laptop charging.

How do I charge a laptop with HDMI and USB-C?

Use a USB-C hub with HDMI and USB Power Delivery pass-through. Plug a compatible USB-C charger into the hub’s PD input, connect the hub to your laptop, and use HDMI separately for your display.

The laptop is being charged through USB-C PD, not HDMI.

Can HDMI provide power?

Yes, HDMI includes a small 5V supply. Newer HDMI Cable Power implementations can provide up to 300 mA at 5V to compatible active HDMI cables. That is far below normal laptop charging requirements.

Can you charge a Chromebook with HDMI?

Not directly.

If the Chromebook supports USB-C Power Delivery, charge it through its supported USB-C charging port with a compatible PD charger or powered USB-C dock.

Can you charge a MacBook through HDMI?

No.

Compatible MacBooks can charge through USB-C or MagSafe, depending on the model. Apple also supports charging from compatible USB-C or Thunderbolt displays.

Can I charge a laptop from a monitor?

Yes, if the monitor has a USB-C or Thunderbolt port that provides enough Power Delivery for your laptop.

An HDMI-only connection will not normally charge it.

Can I charge my laptop without its original charger?

Often, yes.

A compatible USB-C PD charger, USB-C monitor, docking station, or appropriately rated laptop power bank may work if your laptop supports that charging method. Match the laptop’s required wattage and charging specifications.

Can USB-A charge a laptop?

Usually not as a practical replacement for a modern laptop charger.

Traditional USB-A power levels are far below what most laptops require, and USB-A does not provide the same high-power USB PD capability available through compatible USB-C setups.

The Bottom Line

If you came here searching for how to charge a laptop with HDMI, here’s the answer worth remembering:

You cannot safely charge a normal laptop battery directly through HDMI.

HDMI carries a small amount of electrical power, but it isn’t a laptop charging interface.

What does work is:

Method 1: Use a USB-C HDMI hub with Power Delivery pass-through and a compatible USB-C charger.

Method 2: Use a powered USB-C/Thunderbolt monitor or docking station that supplies Power Delivery to the laptop.

In both cases, HDMI may be part of your display setup—but USB-C Power Delivery is doing the charging.

If your laptop doesn’t support USB-C charging, use the manufacturer-recommended charging port and a properly rated replacement adapter rather than attempting to improvise through HDMI.

How to Charge a Laptop With HDMI? 2 Methods Explained