AC adapter Dell FWXK3 240W (7.4 mm) external power supply for laptops

Dell FWXK3 240W AC adapter is an external power supply designed for compatible Dell laptops and mobile workstations. It provides up to 240 watts of power through a 7.4 mm barrel connector to support battery charging and system operation under sustained heavy load. The adapter is intended as a high‑power replacement or spare unit for users running demanding applications or using power‑hungry hardware.

Advantages

The adapter delivers a stable high output that supports fast charging and continuous operation during intensive tasks. Its universal external design keeps laptop internals cooler by offloading power conversion, and the 7.4 mm connector ensures secure mating with compatible Dell laptop power ports. The compact brick and integrated cable management make it practical to carry as a spare for travel or office use.

Suitable for

• High‑performance Dell laptops and mobile workstations requiring 240W external power
• Users who need a reliable replacement or spare AC adapter
• Environments where sustained power delivery is needed for heavy CPU/GPU loads
• Travel and remote work where an additional adapter is required

Key specifications

• Output power: 240 W
• Connector type: 7.4 mm barrel connector
• Input: AC mains (standard household voltage range)
• Form factor: External brick with attached output cable
• Intended use: Charging and powering compatible Dell laptops under heavy load

How to use

Connect the adapter to a suitable AC mains outlet using the appropriate mains lead, then insert the 7.4 mm connector firmly into the laptop power port. Ensure the connection is secure and that the adapter is placed on a flat, well‑ventilated surface during operation to allow heat dissipation. When not in use, disconnect the adapter from the mains and the laptop, and store it in a dry location. Use only with laptops that accept a 7.4 mm barrel connector and support 240W external power.

Usage recommendations

Verify compatibility with your laptop model before purchase and inspect the connector and cable periodically for wear or damage. Avoid covering the adapter while in use to prevent overheating. Use the original or equivalent mains lead rated for your region, and replace damaged cables promptly to maintain safe operation.