Compatibility This product is compatible with the following systems: 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 130-Watt AC Adapter from Dell™ is specially designed to meet the power needs of your Dell laptop. Packed with of 130-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. Compatibility - Genuine Dell-branded parts undergo rigorous testing by qualified engineers to ensure compatibility and reliability in your Dell system. - Our sustaining qualification process allows for testing and certification of the newest technology on your Dell system. This product is compatible with the following systems: - Latitude E5440 - Latitude E5540 - Latitude E6440 - Latitude E6540 - Latitude E7240 - Latitude E7440