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Compact 7.9 by 5.5mm female to USB-C male power adapter in PC and metal finish, 54 by 15 by 15mm

eForChina

eForChina 7.9 x 5.5mm Female to USB-C Male Power Adapter

SKU CH-444W-9WD0T

Converts a USB-C PD charger to a 7.9 x 5.5 mm barrel jack in a compact 54 x 15 x 15 mm, 10.5 g adapter

  • Changer TypePower Adapter
  • Converts 7.9 x 5.5mm barrel plug to USB-C power input
  • Pocket-sized at 54 x 15 x 15 mm for travel
  • Weighs only 10.5 g so it adds negligible bulk
  • PC plus metal housing resists daily wear
  • Requires a PD-capable charger to function correctly

What it does and who needs it

This adapter converts a USB-C power source into a 7.9 x 5.5 mm barrel output for compatible notebooks. It suits users who want to charge a legacy laptop from a modern PD charger instead of the original brick.

The PD requirement and polarity limit

The unit only functions when the USB-C supply supports Power Delivery negotiation; a standard 5 V port will not activate it. Polarity is fixed, so reversing the connector prevents operation and the adapter cannot be used with non-PD sources.

Build and daily handling

A polycarbonate and metal shell measures 54 x 15 x 15 mm and weighs 10.5 g, making it pocket-sized for travel. The snug barrel jack and reversible USB-C plug reduce cable strain during frequent connect and disconnect cycles.

Highlights

  • Converts 7.9 x 5.5mm barrel plug to USB-C power input
  • Pocket-sized at 54 x 15 x 15 mm for travel
  • Weighs only 10.5 g so it adds negligible bulk
  • PC plus metal housing resists daily wear
  • Requires a PD-capable charger to function correctly

Specifications

Changer TypePower Adapter

Questions about this item

Should I choose this 7.9 x 5.5mm adapter or look for a different barrel size?

Select this adapter only if your laptop requires a 7.9 x 5.5mm barrel plug; the output is fixed to that size and will not fit other diameters.

What does the PD requirement mean when I plug this into my laptop?

Your USB-C charger must support Power Delivery negotiation; without PD the adapter cannot request the voltage your laptop expects.

Does the USB-C male plug limit charging speed to a specific USB standard?

The adapter passes whatever voltage and current the PD charger negotiates; it does not enforce a USB 2.0 or 3.x power ceiling.

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