We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small rectangular adapter with USB-C plug and 4.0 x 1.7mm female port, matte black plastic and metal body

eForChina

eForChina 4.0 x 1.7mm Female to USB-C Male Adapter

SKU CH-CCVP-2KJZE

Converts a USB-C PD charger to a 4.0 x 1.7 mm barrel jack for notebook power in a compact 53 x 15 x 13 mm metal-and-PC adapter

  • Changer TypePower Adapter
  • Connects 4.0 x 1.7mm barrel devices to USB-C power
  • Pocket-sized at 53 x 15 x 13 mm for travel
  • PC and metal housing resists daily wear
  • Weighs only 9 g so it adds no bulk
  • Requires PD charger for correct operation

Compact adapter for legacy notebook power

This adapter converts a 4.0 x 1.7 mm barrel connector to a USB-C male plug, letting older laptops draw power from a modern PD charger. It suits users who want to replace a lost proprietary brick with a single multi-port GaN supply. The tiny 53 x 15 x 13 mm housing weighs about 9 g and slips into any cable pouch.

Requires a PD-capable charger and correct polarity

The unit needs a USB-C power source that supports Power Delivery; a standard 5 V phone charger will not activate the notebook. Polarity is fixed, so reversing the barrel plug prevents operation and could damage equipment. No driver or software is involved — the connection is purely passive once the PD handshake succeeds.

Delivers up to the notebook’s rated barrel input

The adapter passes whatever voltage and current the PD charger negotiates, up to the limits of the 4.0 x 1.7 mm jack on the target machine. It cannot increase wattage beyond what the charger provides, so high-draw gaming laptops may still need their original high-wattage supply. Barrel tips with different inner diameters are not compatible.

Highlights

  • Connects 4.0 x 1.7mm barrel devices to USB-C power
  • Pocket-sized at 53 x 15 x 13 mm for travel
  • PC and metal housing resists daily wear
  • Weighs only 9 g so it adds no bulk
  • Requires PD charger for correct operation

Specifications

Changer TypePower Adapter

Questions about this item

What power limit does the adapter hit first during sustained use?

The adapter requires a USB-C PD charger; without PD negotiation it will not pass power at all.

Does the adapter generate noticeable heat or noise when used all day?

It contains no active components, so it produces no fan noise and only minimal warmth from passive conduction.

What must I already own for this adapter to work?

A USB-C Power Delivery charger and a device with a 4.0 × 1.7 mm DC input jack.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.