AC power adapter Dell K1PRX 240W 19.5V 12.3A 7.4mm for laptops

Dell K1PRX is a 240W AC power adapter that delivers 19.5V at 12.3A through a 7.4mm barrel connector. It provides mains power and battery charging for compatible Dell laptops, including higher‑performance models in the Alienware and Precision series. The adapter is intended for users who require a high-power external supply for desktop replacement or mobile workstation use.

Advantages

The adapter supports sustained high-current output suitable for power-hungry systems while maintaining stable voltage delivery. Its 7.4mm barrel connector ensures mechanical compatibility with many Dell laptop power inlets. The compact brick design with an AC input cable allows desktop or transportable use and integrates with standard mains voltages for use in office and home environments.

Suitable for

• Charging and powering Dell gaming laptops (Alienware) that require up to 240W
• Supplying power to Dell Precision mobile workstations under heavy CPU/GPU load
• Use as a replacement or spare adapter for compatible Dell models during travel or at a fixed workstation
• Scenarios where sustained high current is necessary, such as rendering, simulation, or extended gaming sessions

Key specifications

• Output voltage: 19.5 V DC
• Output current: 12.3 A
• Rated power: 240 W
• Connector type: 7.4 mm barrel plug
• Input: AC mains (compatible with standard household and office voltages)
• Form factor: External power brick with separate AC cable

How to use

Connect the AC cable to the adapter and plug the cable into a suitable mains outlet. Insert the 7.4mm barrel connector firmly into the laptop's power input jack until it seats properly. When connected, the adapter will supply mains power and charge the laptop battery according to the system's power management. Disconnect the adapter by first unplugging from the laptop, then from the mains, and store the adapter in a dry, ventilated place when not in use.

Usage recommendations

Use the adapter with laptops that accept a 7.4mm barrel connector and require the specified voltage and current. Avoid using adapters with mismatched voltage or connector types. Ensure vents on the power brick are not obstructed during operation and avoid exposure to moisture or extreme temperatures to maintain safe and reliable performance.