Stop lugging your AC adapter back and forth between home and office. Get a second AC adapter for your Laptop and keep one in the office and one for home or travel. The Dell 90-Watt AC adapter enables you to operate your Laptop or charge the battery from electrical power outlets. This product has been tested and validated on Dell systems to ensure it will work with your computer and is compatible with Dell Inspiron 9400/E1705 Laptops / Precision M65 Mobile WorkStation. It is supported by Dell Technical Support when used with a Dell system.