Sometimes you need to work on the road – but what do you do when your laptop runs low on power? This guide will take you through your options for charging a laptop in your car.

Using a power inverter

Probably the most effective way to recharge your laptop battery is using a power inverter. A power inverter plugs into your car’s 12V outlet (usually called the cigarette lighter) and converts the car’s DC power into AC power, just like a standard wall outlet. Once connected, you simply plug your laptop charger into the inverter and carry on as normal.

A 150W inverter is compatible with virtually any laptop model, although some high-performance notebooks may require a 300W or higher inverter to complete a full battery charge. Check your laptop charger carefully – it is important to choose an inverter that matches your laptop’s power requirements to avoid overloading the device or your car’s electrical system.

When using a power inverter, always start your car before plugging in your laptop to prevent draining the car battery. Avoid charging your laptop for long periods when the engine is off, as this can quickly deplete car battery, leaving you stranded because you cannot start your car.

Using a USB-C car charger

Many laptops, such as Apple MacBooks, charge via USB-C connection. This allows you to use a high-powered USB-C car charger which is both convenient and compact. Many modern vehicles come with built-in USB-C ports, making it even easier to charge your laptop. 

If your car lacks USB-C ports, or cannot deliver enough wattage, you can use a USB-C car adapter. Make sure you choose a charger that supports Power Delivery (PD) and provides enough wattage for your laptop, typically 45W, 65W, or even 100W for more demanding devices. You can find the wattage printed on the label on your regular laptop charger.

It’s worth noting that USB-C charging speeds may not match those of a wall outlet, so it takes longer to achieve a full battery charge. However, USB-C charging is efficient and hassle-free for most people.

Using a dedicated car laptop charger

Some manufacturers offer car chargers specifically designed for certain laptop models. These plug directly into the 12V outlet and provide the correct voltage and current for your device – they are like an all-in-one inverter-charger. Compact and efficient, these dedicated chargers are often more affordable than a general inverter. 

However, a generic laptop charger (one not made specifically for your device) may not deliver enough power for high-performance laptops used for gaming or video editing. Always check compatibility and power output before purchasing to ensure you get a charger that meets your needs.

Using a portable power bank or power station

Power banks are incredibly popular for recharging smartphones on the move – but did you know they can also be used to give your laptop battery a boost? These devices store energy and can be charged at home or in the car. Connect your laptop using a USB-C cable and you can trickle charge the battery whenever you need to. 

You should look for a power bank with at least 20,000 mAh capacity and a minimum output of 45W to reliably charge a laptop. Alternatively, a heavy duty, portable power stations offers greater charging potential and more AC outlets, USB ports, and sometimes DC carports. This means you can power multiple devices for extended periods-ideal for camping or long trips, although the station is much heavier, more expensive and cannot be carried in a pocket or bag.

Safety tips and best practices

Like any electrical device, you should exercise caution when charging your laptop in the car to prevent damage:

  • Always check your laptop’s power requirements and ensure your charging solution matches them.
  • Charge your laptop while the car is running to avoid draining the vehicle battery.
  • Use high-quality cables and chargers to prevent overheating, short circuits or damage to car or laptop.
  • Regularly inspect connections and equipment for wear and tear.
  • Store all charging accessories in your vehicle glove compartment or trunk for easy access.

Charging a laptop in your car is easy – when you have the right gear. Whether you choose an inverter, USB-C charger, dedicated car charger, or a portable power solution, make sure to match your laptop’s needs and follow safety guidelines to keep both your device and your car running smoothly.