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Silver nylon braided cable with DC 7.9mm female to USB C male connectors 17.4cm

BUCIER

BUCIER PD 140W DC7909 to USB C Cable 7.9mm x 0.9mm Female to Type C Male 17.4cm

SKU CH-5CD6-HYSPM

A 17.4 cm adapter cable converts a DC 7.9 mm × 0.9 mm barrel jack to USB-C with a built-in PD chip supporting up to 140 W output

  • Connection typeUSB Type C
  • Connector detailsUSB Type C
  • Apple compatibilityLaptop
  • Build detailsCopper
  • Product colorSilver
  • Charges phones and tablets from a DC barrel source
  • Powers compatible laptops at up to 140W via USB-C
  • Built-in PD chip negotiates 5V, 9V or 20V automatically
  • Nylon-braided jacket with pure-copper core for durable daily use
  • Compact 17.4 cm length fits easily in a bag

What the cable does and who needs it

This adapter cable converts a DC 7.9mm x 0.9mm female input into a USB Type C male output with an integrated PD identification chip. It is built for users who want to power or charge Type C devices such as phones, tablets or laptops from a compatible DC power brick while leaving the bulkier charger behind. The 17.4cm nylon braided cable with pure copper cores and metal connector heads is designed for portable use in a backpack or laptop bag. It suits anyone who already owns a suitable DC source and needs a compact bridge to modern USB C equipment.

Capacity and headroom

The cable supports PD output profiles of 5V, 9V at 2A and 20V at 7A, reaching a maximum of 140W with no 12V or 15V steps. The DC input must supply 15V to 20.5V and the source brick must exceed the device's power draw; a 90W brick will not run a 90W or 100W laptop. Buyers whose laptops demand more than 140W or who only have a lower wattage DC adapter cannot use this cable for that device. The fixed 17.4cm length also limits placement flexibility compared with longer leads.

Thermals noise and power draw

Passive copper conductors and a short 17.4cm run keep resistive losses low during normal charging up to 140W. The moulded metal heads and nylon braid dissipate heat without any active cooling so the assembly stays silent in operation. Power draw is dictated entirely by the connected device and the PD negotiation handled by the built in chip; the cable itself adds no measurable overhead.

How it compares

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

Price $16.99
Pricier than about 60% of the 15,227 comparable items (median $14.99).

Specifications

Product
Brand nameSinLoon
Product colorSilver
Ports & slots
Connection typeUSB Type C
Connector detailsUSB Type C
Size & build
Build detailsCopper
Compatibility
Apple compatibilityLaptop

Questions about this item

Will this cable let me power my older laptop that uses a 7.9 mm x 0.9 mm barrel jack from a USB-C PD charger?

Yes — the cable accepts 15 V to 20.5 V on the DC7909 female end and delivers up to 140 W via the USB-C male plug, so a compatible PD charger can replace the original brick.

How can I confirm the built-in PD chip is negotiating the correct voltage for my device?

The chip automatically requests 5 V, 9 V or 20 V from the charger; if your laptop charges normally and shows the expected power level in its battery settings, the negotiation is working.

Does the package include a USB-C power adapter or only the 17.4 cm converter cable?

Only the converter cable is included — a USB-C PD charger capable of at least your laptop’s wattage must be purchased separately.

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