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Short braided cable with DC barrel plug, USB-C connector and LED display module

Fervit

Fervit DC 7.9x5.4mm to USB-C 140W LED Display Cable 21cm

SKU CH-K2RC-P917W

Converts a 7.9x5.4mm DC jack to USB-C with 140W maximum output and an LED display showing real-time voltage, current and power

  • Delivers up to 140W charging with 20V/7A output
  • Real-time LED display shows voltage, current and power
  • Tangle-free braided sleeve adds rugged durability
  • 21 cm compact length for easy portability
  • Works with USB-C laptops including Mac Pro 2020, 2019, 2018, XPS, Chromebook

DC 7.9x5.4mm to USB-C cable for 140W charging

This cable converts a 7.9x5.4mm DC barrel input to a USB-C output with an integrated LED display. It targets users who need to power USB-C laptops, tablets or phones from a compatible DC source while monitoring real-time voltage, current and wattage. The 21cm braided sheath adds durability for portable use.

Maximum 140W at 20V/7A output

The cable delivers up to 140W when paired with a 15V to 20.5V DC supply and a device that accepts 20V/7A. It also negotiates 5V/1.5A and 9V/2A profiles for lower-power hardware. Without a matching DC input and a PD-capable device the full 140W cannot be reached.

Sustained output depends on source and device limits

Continuous 140W operation requires a stable DC input within the 15V to 20.5V range and a host that maintains 20V/7A without thermal throttling. The LED display helps verify that the negotiated profile holds under load, but the cable itself does not regulate temperature or voltage beyond the negotiated PD contract.

How it compares

Measured against everything we stock in USB Cords & Extension Cables, at today’s prices. Recalculated every night.

Price $17.99
Pricier than about 70% of the 15,227 comparable items (median $14.99).

Specifications

Product
Brand nameFervit

Questions about this item

What does the 140W rating mean when the cable is connected to a laptop?

The cable can deliver up to 140W at 20V/7A when paired with a 140W power source and a compatible USB-C device, and it will also negotiate 100W or 65W for lower-power laptops.

Which charging standards does the USB-C end actually negotiate?

It negotiates USB PD plus QC 2.0, QC 3.0, DCP, PE+ 1.1, PE 2.0, FCP, AFC, SFCP and SCP, accepting 15V–20.5V input and outputting 5V/1.5A, 9V/2A or 20V/7A.

Will the 7.9×5.4mm DC jack fit my laptop’s power port?

The barrel connector measures 7.9mm outer diameter by 5.4mm inner diameter, so it fits laptops that use that exact jack size.

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