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Small black HP power adapter dongle converting 7.4 mm to 4.5 mm

HP

HP K0Q39AA 7.4 mm to 4.5 mm power adapter

SKU CH-VYSK-P1D4K MPN K0Q39AA

Converts a 7.4 mm barrel connector to a 4.5 mm plug for HP power supplies

  • Converts 7.4 mm barrel plugs to 4.5 mm jacks
  • Genuine HP part ensures correct voltage delivery
  • Compact dongle fits tight laptop ports
  • Includes documentation for quick setup

7.4 mm to 4.5 mm connector adapter

This HP K0Q39AA adapter converts a 7.4 mm barrel jack to a 4.5 mm plug for compatible power supplies. It allows a newer HP charger to connect to an older laptop port. The dongle provides a direct mechanical and electrical link between the two sizes. No configuration or driver installation is required.

Suits owners of legacy HP laptops with 4.5 mm inputs

Buyers who need a 7.4 mm plug for a modern laptop cannot use this dongle. Users with USB-C or proprietary slim-tip charging ports should look at a different adapter. The single conversion direction does not support the reverse connection. Anyone requiring a longer cable run will need an extension cord separately.

How it compares

Measured against everything we stock in AC Adapters & Power Bricks, at today’s prices. Recalculated every night.

Price $42.99
Pricier than about 75% of the 3,875 comparable items (median $23.99).

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Specifications

Product
Brand nameHewlett Packard
Size & build
Shipping weight0.09 kg
Package size241 × 178 × 25 mm

Questions about this item

Does my laptop need a 7.4 mm barrel port to use this HP K0Q39AA adapter?

Yes, the dongle plugs into a 7.4 mm barrel input on the laptop and converts it to a 4.5 mm tip for the charger.

Will this adapter let me keep using my older 4.5 mm HP charger with a newer 7.4 mm laptop?

Exactly, it bridges the 7.4 mm laptop socket to the 4.5 mm plug on your existing power supply.

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