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Black rectangular AC adapter with 4.5 by 3.0 mm barrel connector and detachable power cable

myVolts

myVolts 45W 19.5V 2.31A AC Adapter 4.5×3.0 mm

SKU CH-57R7-9C28B

A 45 W, 19.5 V AC adapter with a 4.5 × 3.0 mm connector for compatible HP Pavilion, EliteBook, Stream, Spectre and Envy laptops

  • 45 W output powers compatible HP laptops efficiently
  • 5 V / 2.31 A delivery matches original charger specs
  • 5 × 3.0 mm barrel connector fits listed HP models
  • 100–240 V input works worldwide without a voltage converter
  • Includes AC adapter and AC power cable in the box

What this adapter replaces

This 45 W AC adapter supplies 19.5 V at 2.31 A through a 4.5×3.0 mm barrel connector. It is built for HP laptops including Pavilion 11, 13, 15 and 17 models, EliteBook Folio 1020 G1, 1040 G1 and 1040 G2, Stream x360 11, 13 and 14, Spectre x360 13 and 15, Envy x360 13 and 15, and ProBook 11 EE G1, 210-G1, 255-G3, 255-G4, 255-G5, 340-G2, 350-G2, 355-G2, 410-G1, 450-G3, 455-G3 and 612-G1. The package includes the adapter and an AC power cable.

Input voltage and connector fit

The unit accepts 100-240 V at 50-60 Hz, so it works on mains supplies worldwide without a separate voltage selector. The only physical constraint is the barrel plug: interior diameter 3.0 mm, exterior diameter 4.5 mm. If the laptop requires a different pin diameter or a centre-positive polarity that does not match, the adapter will not connect or will not charge. No other interface or communication protocol is involved.

Installation and common issues

Plug the AC cable into the adapter, insert the barrel into the laptop power port, then connect the mains plug. The connection is purely mechanical; there is no driver or firmware step. Problems usually arise when the tip size is close but not identical — forcing a mismatched barrel can damage the DC jack. Verify the 4.5×3.0 mm dimensions against the original charger before use. Buyers who need a USB-C power delivery charger or a higher wattage unit for a larger workstation cannot use this model.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $25.99
Cheaper than about 60% of the 27,790 comparable items (median $30.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I know if the 4.5×3.0 mm connector fits my HP laptop?

The adapter uses a 4.5 mm outer and 3.0 mm inner diameter barrel tip; match those dimensions to your laptop's DC jack or check the compatible model list that includes many HP Pavilion, Stream, Spectre, EliteBook Folio, Envy and ProBook series.

Will the 45 W output charge my HP Spectre x360 13 at full speed?

The unit delivers 19.5 V at 2.31 A for 45 W total, which matches the factory charger spec for the listed Spectre x360 13 models, so charging performance will be identical to the original supply.

Can I use this adapter worldwide with the 100-240 V input range?

Yes, the input accepts 100-240 V at 50-60 Hz, so it works on mains voltages from North America to Europe and beyond without a voltage converter, only a plug adapter for the local socket.

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