Please check compatibility with your laptop carefully as laptop models do vary.Ensure you have the correct Tip Size, Output Voltage and Amp Rating from your previous charger.The AC power adapter enables you to operate your laptop or charge the battery from electrical power outlets.If you are running your computer on AC power with a battery installed, the adapter charges the battery ( if needed ) and maintains its charge.Tip Size:5.0m X 7.9m OctagonOutput: 19.5V 3.34AUK Three-Pin Plug Power CordCompatibility:Dell Inspiron 1318 1545 1546 1551 1557 1750/Dell Inspiron XPS M1330 ADP-65AH B HR763 PA-21 330-0395 NX061 Please check compatibility with your laptop carefully as laptop models do vary.