7.4mm to 4.5mm DC Power Adapter Cable — HP & Dell Compatible

Need to connect an older round-tip power supply to a newer slim-tip laptop port? This compact DC power converter cable makes it easy. Designed to convert a 7.4mm × 5.0mm round jack (old type) to a 4.5mm × 3.0mm plug end (new type), it's an affordable, plug-and-play solution for HP and Dell laptop users upgrading their charging setup.

⚠️ Important Notes:

This cable is intended for same-brand transfers only — HP power supply to HP laptop, or Dell power supply to Dell laptop.
Cross-brand use (e.g. HP charger with Dell laptop) is not supported.
When used with a Dell laptop, this adapter will power the device on but will not charge the battery — this is a known Dell firmware limitation.

Key Features

✅ Converts 7.4mm × 5.0mm round connector to 4.5mm × 3.0mm slim blue-tip plug
✅ Compatible with select HP and Dell laptops
✅ Lightweight at approximately 16g
✅ Black cable with distinctive blue tip for easy identification
✅ 100% brand new and quality-tested
✅ Great replacement or backup adapter cable

Specifications

Input Connector	7.4mm × 5.0mm Round Jack (old type)
Output Connector	4.5mm × 3.0mm Plug End (new type / blue tip)
Color	Black with Blue Tip
Weight	Approx. 16g
Compatible Brands	HP, Dell
Type	Cable Adapter
Country of Origin	Made in China

What's in the Box?

1 × DC Power Adapter Cable (7.4mm to 4.5mm)

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For more information on electrical connector safety standards, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: AC adapter

Frequently Asked Questions

Q: Can I use this DC adapter cable to connect an HP charger to a Dell laptop?

A: No. This cable is designed for same-brand use only — HP power supply to HP laptop, or Dell power supply to Dell laptop. Cross-brand connections are not supported and will not function correctly.

Q: Will this cable charge my Dell laptop battery?

A: When used with a Dell laptop, this adapter can power the laptop on, but due to Dell's firmware restrictions, it will not charge the battery. It functions as a power-only connection in this case.

Q: What connector sizes does this cable convert?

A: This cable converts a 7.4mm × 5.0mm round DC jack (older HP/Dell charger style) to a 4.5mm × 3.0mm slim blue-tip plug (newer HP/Dell laptop port style).

Q: Is this cable compatible with all HP and Dell laptop models?

A: This cable is compatible with HP and Dell laptop models that use the 7.4mm round input and 4.5mm blue-tip output connectors. Please verify your laptop's port size and your charger's connector size before purchasing to ensure compatibility.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

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