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Black rectangular 120W power adapter with 7.4mm*5.0mm connector and detachable power cord

V2 Technologies

V2 Technologies 120W HP Thunderbolt Dock Adapter 2 in 1 accessory

SKU CH-0123-EQ4TB

Replacement 120 W AC adapter with 7.4 mm × 5.0 mm connector for HP Thunderbolt Dock G2 and compatible laptops

  • Reliable power with 120 W output at 19.5 V 6.15 A
  • Worldwide use via 100-240 V 50-60 Hz input range
  • Secure charging backed by UL certification and multiple protections
  • Fits HP Thunderbolt Dock 120W G2 and listed EliteBook models
  • Includes AC adapter and power cord for direct replacement

HP Thunderbolt Dock 120W G2 power supply

This 120 W AC adapter replaces the original HP charger for the Thunderbolt Dock 120W G2 and compatible EliteBook, Envy and ProOne models. It delivers 19.5 V at 6.15 A through a 7.4 mm by 5.0 mm barrel connector and operates on 100–240 V mains input.

Replaces worn or lost HP 120W dock adapters

The unit matches part numbers such as HSTNN-DA25, ADP-120MH and 644699-001, so it restores full charging performance when the factory supply fails or goes missing. The upgrade is worth it when the original brick shows damaged cables, intermittent power or no longer meets the dock’s 120 W requirement.

Simple barrel-plug installation

Plug the barrel into the dock, connect the IEC cord to the wall and power on; no drivers or configuration are required. Common issues arise only if the connector size is mismatched or the dock’s input rating differs from 19.5 V 6.15 A, so verify the label before use.

Highlights

  • Reliable power with 120 W output at 19.5 V 6.15 A
  • Worldwide use via 100-240 V 50-60 Hz input range
  • Secure charging backed by UL certification and multiple protections
  • Fits HP Thunderbolt Dock 120W G2 and listed EliteBook models
  • Includes AC adapter and power cord for direct replacement

Specifications

No published specifications for this item yet.

Questions about this item

What connector size fits the HP Thunderbolt Dock 120W G2?

The adapter uses a 7.4 mm by 5.0 mm barrel connector that matches the dock's power input.

How do you install the adapter, and what step is often missed?

Plug the IEC power cord into the adapter brick, then insert the 7.4 mm barrel into the dock; the step often missed is confirming the dock requires 19.5 V at 6.15 A before connecting.

When should the power cord or adapter be replaced?

Replace the cord if the IEC plug or cable sheath shows damage, and replace the adapter if output voltage drops below 19.5 V or the unit overheats during use.

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