Is the HP 609940-001 AC Adapter compatible with specific HP ProBook Notebooks?

Yes, the HP 609940-001 AC Adapter is compatible with HP ProBook Notebooks including models 4320s, 4321s, 4420s, 4421s, and 4720s.

What is the output voltage and current of the HP 609940-001 AC Adapter?

The output voltage of the HP 609940-001 AC Adapter is 19V, and the output current is 4.74 A.

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HP 609940-001 AC Adapter

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General InformationManufacturer: HP Inc.Manufacturer Part Number: 609940-001Manufacturer Website Address: http://www.hp.comBrand Name: HPProduct Name: AC AdapterProduct Type: AC AdapterTechnical InformationDevice Supported: NotebookPower DescriptionInput Voltage: 110 V AC220 V ACOutput Voltage: 19 V DCMaximum Output Power: 90 WMaximum Output Current: 4.74 AMiscellaneousCompatibility: HP ProBook Notebooks:4320s4321s4420s4421s4720sEnvironmentally Friendly: YesEnvironmental Certification: RoHSCountry of Origin: China

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General InformationManufacturer: HP Inc.
Manufacturer Part Number: 609940-001Manufacturer
Website Address:
http: //www. hp.
comBrand Name: HPProduct
Name: AC
AdapterProduct Type: AC
AdapterTechnical InformationDevice Supported: NotebookPower
DescriptionInput Voltage: 110
V AC220 V ACOutput Voltage: 19 V DCMaximum
Output Power: 90 WMaximum
Output Current: 4.74
AMiscellaneousCompatibility: HP
ProBook Notebooks: 4320s4321s4420s4421s4720sEnvironmentally
Friendly: YesEnvironmental
Certification: RoHSCountry of
Origin: China

Model
Brand	HP

Details
Color	Multicolor
Type	AC Adapter
Battery Type	Lithium-Ion
AC Adapter Voltage	19V
AC Adapter Current	4.74 A
AC Adapter Output Power	90W

Features
Function	Notebook

Additional Information
First Listed on Newegg	January 14, 2026

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