Can You Charge Usb C Laptop With Phone Charger

Can You Charge a USB-C Laptop with a Phone Charger?

Understanding USB-C Power Delivery

USB-C is a versatile port that supports both data transfer and power delivery. Laptops with USB-C ports can be charged using compatible chargers and cables. USB-C Power Delivery (PD) is a standard that defines the power levels that can be delivered over a USB-C connection.

  • USB-C PD 3.0: Up to 100 watts (20 volts, 5 amps)
  • USB-C PD 2.0: Up to 60 watts (20 volts, 3 amps)

Phone Charger Power Output

Phone chargers typically provide a lower power output compared to laptop chargers. They range from 5 watts to 30 watts, with most falling in the range of 10-18 watts. The power output of a phone charger is determined by its voltage and amperage, typically 5 volts and 1-3 amps.

Compatibility Considerations

Whether you can charge a USB-C laptop with a phone charger depends on the power requirements of the laptop and the power output of the charger. Generally, phone chargers with a power output of at least 45 watts are recommended for charging laptops.

Charging Speed

Using a phone charger to charge a laptop will result in a slower charging speed compared to using a dedicated laptop charger. This is because the phone charger provides less power, leading to a longer charging time.

Battery Health

Constantly charging a laptop with a low-power phone charger can put strain on the laptop’s battery. Over time, this may shorten the battery’s lifespan and reduce its capacity.

Recommended Chargers

It is highly recommended to use a dedicated laptop charger that meets the power requirements of your laptop. However, if necessary, you can use a phone charger with a power output of at least 45 watts to charge your laptop. Consider the following dos and don’ts to ensure safe charging:


  • Use a high-quality USB-C PD cable.
  • Check the power output of the phone charger before using it with your laptop.
  • Avoid using a phone charger for extended periods of time to charge your laptop.


  • Don’t use a phone charger with a power output lower than 45 watts.
  • Don’t use cheap or low-quality USB-C cables.
  • Don’t leave your laptop plugged into the phone charger overnight.


In conclusion, you can charge a USB-C laptop with a phone charger, provided that the phone charger meets certain power requirements and usage guidelines. However, it is not recommended as an ideal or long-term solution due to slower charging speeds and potential impact on battery health. For optimal performance and longevity of your laptop’s battery, use a dedicated laptop charger.

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