how to charge laptop with hdmi cable

by:HDera     2023-10-07

How to Charge Your Laptop Using an HDMI Cable


With the increasing dependence on laptops for both work and leisure, it's not uncommon to find ourselves in situations where the laptop battery is drained, and we need a quick solution to power it up. One innovative method that has gained attention is using an HDMI cable to charge a laptop. In this article, we will explore this alternative charging method, its limitations, and some essential tips to keep in mind.

Understanding HDMI and Its Function

Before delving into how HDMI cables can be used for charging, it's essential to understand their primary purpose. HDMI (High-Definition Multimedia Interface) cables are most commonly used to transmit high-quality audio and video signals between devices. They enable us to connect laptops, streaming devices, gaming consoles, and televisions seamlessly. However, their capability to transfer data and power simultaneously makes them a potential charging option for laptops as well.

The HDMI Charging Process Explained

1. Compatibility and Requirements

To use an HDMI cable to charge your laptop, certain conditions must be met. Firstly, your laptop and HDMI cable need to support the HDMI version with Mobile High-Definition Link (MHL) availability. MHL is a technology that allows HDMI to carry power. Therefore, ensure your laptop has an MHL-enabled HDMI port.

2. MHL-Enabled HDMI Ports

Not all HDMI ports on laptops are MHL-enabled. To find out if your laptop has an MHL-enabled HDMI port, refer to the user manual or the manufacturer's website. Alternatively, perform an online search using your laptop's make and model, alongside the term 'MHL-enabled HDMI port.'

3. Power Capacity

It's important to note that not all HDMI cables can charge laptops. HDMI cables with standard power capacity are primarily designed for transmitting audio and video signals, not providing power. To charge your laptop, you will specifically need an HDMI cable that supports power transfer. These cables are relatively rare to find, so ensure you have one that explicitly mentions power transfer capability.

4. Connection Process

Once you have confirmed the compatibility and obtained a suitable HDMI cable, follow these steps to charge your laptop:

a. Power off your laptop and identify the HDMI port on both devices—your laptop and the power source (e.g., television).

b. Connect one end of the HDMI cable to the HDMI port on your laptop. The HDMI port on your laptop may vary in location, depending on the make and model.

c. Connect the other end of the HDMI cable to the HDMI port on the power source. It could be a television, screen monitor, or any other device with an HDMI input port.

d. Power on the power source device (e.g., television).

e. Power on your laptop.

5. Limitations and Considerations

While using an HDMI cable to charge your laptop might seem like a convenient option, it has its limitations and considerations:

a. Power Transfer Limitations: HDMI cables are not primarily designed for charging laptops. As a result, the power transferred through an HDMI cable might be significantly lower than what your laptop battery requires. Consequently, the charging process may take longer or may not provide sufficient power to charge your laptop at all.

b. Charging Speed: Due to the limited power transfer capabilities, charging your laptop through an HDMI cable will be considerably slower compared to using the laptop's original charger.

c. Monitor Optimization: When using an HDMI cable to charge your laptop, your laptop might detect the HDMI connection as a display source. Consequently, it might default to mirror or extend the display to the monitor or television, potentially affecting your workflow.

6. Safety and Precautions

When considering alternative charging methods, ensuring the safety of both your laptop and yourself is paramount. Keep the following precautions in mind:

a. Use Reliable Cables: Always use genuine HDMI cables from reputable manufacturers, as using low-quality or counterfeit cables might damage both devices.

b. Avoid Overheating: Charging through an HDMI cable might generate heat. Monitor the temperature of your laptop during the charging process and ensure proper ventilation to avoid overheating.

c. Unplug Properly: When your laptop is fully charged or whenever you want to disconnect the HDMI cable, ensure you power off your laptop before removing the cable connections.


While it is possible to charge a laptop using an HDMI cable, this method comes with several limitations. These include compatibility issues, power transfer limitations, slower charging speeds, and potential disruption to your laptop's display settings. Ultimately, it's important to use HDMI cables primarily for their intended purpose of transmitting audio and video signals. If you find yourself in a situation without a charger, consider this method as a last resort. However, it's always recommended to carry your laptop charger or use a power bank for a reliable and efficient charging solution.

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