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Black DC adapter cable with 5.5mm to 4.5mm barrel connectors

Japanese Import

Japanese Import DC power adapter cable 5.5mm x 2.5mm to 4.5mm x 3.0mm for HP

SKU CH-M7KB-78DXG

Converts a standard 5.5 mm x 2.5 mm DC plug to a slim 4.5 mm x 3.0 mm connector for HP notebooks without changing voltage

  • Connection typeLighting to USB C
  • Converts standard 5.5 mm x 2.5 mm DC plug to slim 4.5 mm x 3.0 mm for HP notebooks
  • Adapts connector shape only, preserving original voltage and current ratings
  • Female 5.5 mm x 2.5 mm jack accepts common barrel power supplies
  • Male 4.5 mm x 3.0 mm tip fits HP slim-port laptops
  • Ships from Japan as a single conversion adapter cable

DC power adapter for HP notebooks

This new adapter cable converts a standard 5.5 mm by 2.5 mm DC barrel plug to the slimmer 4.5 mm by 3.0 mm connector used on certain HP notebooks. It ships from Japan as a single conversion cable. The female end accepts the larger plug while the male end fits the smaller HP port, changing only the physical connector shape.

Passive connector conversion

The cable contains no active electronics and does not alter voltage, current or polarity. It simply passes power through from a compatible supply to the notebook, so thermal output, noise and power draw remain identical to the original adapter. No fan, heatsink or power circuitry is present.

Single cable in the box

The package includes only the power connector conversion adapter cable itself. No additional software, drivers, mounting hardware or alternate tips are supplied. Buyers who need a different barrel size or a complete power supply unit will not find those items here.

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

Ports & slots
Connection typeLighting to USB C

Questions about this item

How do I connect the 5.5 mm x 2.5 mm female end to my power brick and avoid a loose fit?

Push the female jack straight onto the charger tip until it seats fully; the inner pin must engage the 2.5 mm bore before you route the cable.

Will the 4.5 mm x 3.0 mm male plug wear out and need replacement?

The plug is a passive metal barrel; it has no moving parts, so only physical damage or corrosion would require a new cable.

At what current does the 4.5 mm x 3.0 mm tip become the limiting factor?

The adapter only changes connector geometry; the current limit is set by your charger and laptop, not by the cable itself.

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