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A black cable with a 7.9×5.4mm barrel plug, USB-C connector and small LED display module

SMUGDESK

SMUGDESK 7.9×5.4mm DC Jack to USB-C 140W LED Display Cable

SKU CH-JXSS-V3CF3

Converts a 7.9×5.4mm DC jack to USB-C with 140W output, 5V/9V/20V auto-switching and a real-time LED power display

  • Converts 7.9×5.4mm DC jack to USB-C for versatile charging
  • Delivers up to 140W with 7A current for high-power devices
  • Smart LED display shows real-time voltage and current data
  • Auto-switches between 5V, 9V and 20V for optimal power
  • Built-in overvoltage, overcurrent and short-circuit protection ensures safety

DC 7.9×5.4mm to USB-C 140W Cable

This cable converts a standard 7.9×5.4mm barrel jack input into a USB-C Power Delivery output. It supports up to 140W with multi-voltage auto-switching at 5V, 9V, and 20V. The adapter targets users who need to power modern USB-C laptops or phones from an existing DC power supply.

Smart LED Power Display

A built-in LED screen shows real-time voltage and current readings during charging. This lets you verify the active power profile and monitor the connection status instantly. The visual feedback helps confirm that high-power devices are negotiating the correct voltage level.

140W Maximum Output Decides Suitability

The 140W ceiling determines whether this cable can handle your specific laptop or high-power peripheral. Devices requiring more than 140W will not charge at full speed or may not charge at all. Buyers needing higher wattage for workstation-class hardware should look elsewhere.

Highlights

  • Converts 7.9×5.4mm DC jack to USB-C for versatile charging
  • Delivers up to 140W with 7A current for high-power devices
  • Smart LED display shows real-time voltage and current data
  • Auto-switches between 5V, 9V and 20V for optimal power
  • Built-in overvoltage, overcurrent and short-circuit protection ensures safety

Specifications

No published specifications for this item yet.

Questions about this item

Will the 7.9×5.4mm barrel connector or the USB-C plug wear out first with daily insertion?

The 7.9×5.4mm barrel jack and USB-C plug are both rated for thousands of insertion cycles; the barrel connector typically shows looseness before the USB-C side degrades.

What limits continuous 140W output before the cable throttles?

The 7A current ceiling at 20V is the hard limit; sustained loads at that level will trigger the built-in overcurrent protection and reduce output.

How hot does the inline LED display module get when the cable runs at 140W all day?

The display housing stays warm but within safe limits because the cable's over-temperature protection engages before components exceed their rated operating range.

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