Thunderbolt USB Type-C Power Delivery Available When the Laptop is Powered Off

Summary: Power Delivery continues to function when the laptops are off but connected to AC power.

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Symptoms

The Thunderbolt USB Type-C ports on the computer may continue to output power to charge other devices when the computer is powered off.

Affected Platforms:

  • Dell 14 Premium DA14250
  • Dell 16 Premium DA16250
  • Precision 3550
  • Precision 5550
  • Precision 5750
  • XPS 13 9300
  • XPS 14 9440
  • XPS 15 9500
  • XPS 16 9640
  • XPS 17 9700

Cause

If the computer is connected to the AC power supply, the Thunderbolt USB Type-C Power Delivery function is energized. Any peripheral device such as cell phone, Bluetooth device connected to the computer to charge continues to charge while the computer itself is powered off.

Resolution

The computer is functioning per the design specification.

There is no option to disable the Thunderbolt USB Type-C Power Delivery in the computer BIOS. To deenergize the ports, you must also disconnect the AC Adapter from the computer.

Affected Products

Dell 14 Premium DA14250, Dell 16 Premium DA16250, Precision 3550, Precision 5550, Precision 5750, XPS 13 9300, XPS 14 9440, XPS 15 9500, XPS 16 9640, XPS 17 9700
Article Properties
Article Number: 000061589
Article Type: Solution
Last Modified: 16 Oct 2025
Version:  7
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