Qoltec 40W 19V 2.1A AC Adapter for Asus Laptops with 2.5x0.7mm Barrel Connector

When a laptop's original power brick gives out, the search for a compatible replacement often leads to generic adapters with questionable voltage stability or flimsy connectors. The Qoltec 51503 takes a different route: it is built specifically for Asus notebooks that require 19V and up to 40W, and it terminates in the exact 2.5x0.7mm barrel plug those machines expect. That precision removes the guesswork from the purchase and helps protect the laptop's power regulation circuitry over the long term.

Highlights

• Dedicated Asus compatibility: 19V output and 2.5x0.7mm DC connector match common Asus laptop requirements.
• 40W continuous power with 2.1A current delivery for stable charging and operation.
• Wide input range 100-240V AC, 50/60Hz, so it works with EU mains and international travel adapters.
• Integrated safety suite: overvoltage, overcurrent, short circuit, and over temperature protection.
• CE and RoHS certified, with a robust ABS housing for daily use.

In daily use

The adapter ships with a standard EU power cord and uses an IEC C6 (cloverleaf) inlet on the brick itself, which means the cord can be swapped for a local one when travelling. The DC cable measures 1.2 metres, giving enough reach from wall socket to desk without excessive clutter. Its black, matte finish resists fingerprints and blends into any workspace. Because the unit is designed for 40W output, it is best suited to ultraportables, Chromebooks, and older Asus models that do not demand the higher wattage of gaming or workstation laptops. Users should confirm their original charger's output voltage and connector dimensions before ordering.

Full specifications

• Brand: Qoltec
• Model: 51503
• MPN: 51503
• EAN: 5901878515038
• Product type: AC adapter / laptop charger
• Brand compatibility: Asus
• Power output: 40 W
• Output voltage: 19 V
• Output current: 2.1 A
• Input voltage: 100 - 240 V AC
• Input frequency: 50 / 60 Hz
• DC connector type: Round barrel
• DC connector outer diameter: 2.5 mm
• DC connector inner diameter: 0.7 mm
• DC cable length: 1.2 m
• AC power cord included: Yes (EU plug)
• AC input connector (on adapter): IEC C6 (cloverleaf)
• Safety protections: OVP, OCP, SCP, OTP
• Colour: Black
• Certifications: CE, RoHS
• Housing material: ABS plastic

Final note

For Asus laptop owners who need a dependable spare or replacement charger, the Qoltec 51503 delivers the correct voltage, the right connector, and a full set of electrical protections—all in a compact, travel-ready package.