Stop lugging your AC adapter back and forth between home and office. Get a second AC adapter for your notebook and keep one in the office and one for home or travel. The 330-Watt AC Adapter from Dell is specially designed to meet the power needs of your Dell laptop. Packed with of 330-Watt power, this adapter enables you to simultaneously operate your system and charge its battery from electrical power outlets. It comes bundled with 2 meter power cord. This product is compatible with the following systems: - Alienware M18 - Alienware X51 R2.