AC Adapter Dell 240W (model 4GC66) — replacement power adapter for compatible Dell and Alienware laptops

AC adapter Dell 240W (model 4GC66) is a replacement external power supply designed for compatible Dell and Alienware laptops. It delivers up to 240 watts of DC power to charge batteries and power high-performance systems, supporting sustained operation of gaming rigs and mobile workstations. The adapter features a standard laptop DC output connector and integrated thermal and electrical protections to ensure safe charging and stable voltage under variable loads.

Advantages

The adapter provides the original power capacity needed for power-hungry laptops, enabling full performance for demanding applications. Built-in protections reduce risk of overheating, short circuits and overcurrent, and the compact external design simplifies replacement and portability. Compatibility with a range of Dell and Alienware models makes it a practical spare or replacement for users who require reliable, continuous power delivery.

Suitable for

• High-performance laptops used for gaming and content creation
• Mobile workstations and business laptops requiring full power
• Replacement or spare power adapter for travel and remote work
• Environments where original manufacturer's power rating is necessary

Key specifications

• Output power: 240 W DC
• Output type: Single DC output via laptop connector
• Protections: Thermal protection, overcurrent protection, short-circuit protection
• Form factor: External brick-style AC adapter with detachable or fixed AC input cable depending on configuration
• Intended use: Charging battery and powering high-performance laptop systems

How to use

Connect the adapter to a compatible Dell or Alienware laptop by inserting the DC connector into the laptop power jack until it seats securely, then plug the AC input cable into a grounded mains outlet. Use the adapter while the system is powered off or running; the adapter will provide charging and system power according to the laptop's power management. Ensure the adapter and cables are placed on a flat, ventilated surface during use and avoid covering the adapter to prevent heat build-up.

Usage recommendations

To maintain safe operation, use the adapter only with laptops listed as compatible by the manufacturer, avoid exposure to liquids, and replace frayed or damaged cables. If unusually high heat or abnormal behavior is observed, disconnect the power and inspect the adapter and laptop. For consistent performance during extended gaming or workstation tasks, allow adequate ventilation and consider using the original manufacturer's recommended power profile.