The Adapter is a 240W rated power supply and replaces dell alienware m17x r3 laptop charger. Designed to meet Dell’s original specifications. The Replacement Dell AC Adapter is designed to be 100% manufacturer compatible and will meet OEM specifications.This is a genuine Dell Alienware M17x R3 AC Adapter. We only sell genuine Dell AC adapters for a good reason. Dell laptops are very particular. Aftermarket AC adapters often damage the charging circuits on Dell laptops. We learned this the hard way. We strongly recommend you only use a genuine Dell charger with your Dell Alienware M17x R3. You might pay a couple dollars more now but you will save yourself hundreds later.If you are looking to replace an old worn out ac adapter or you recently lost one or you just need to buy an additional Dell Alienware M17x R3 AC Adapter, you have come to the right place. This Dell PA-9E OEM ac power adapter / charger is an excellent choice that is 100% guaranteed to work with your Alienware M17x R3. They are in new to like new condition. The Dell Alienware M17x R3 AC Adapter PA-9E was made by Dell for your laptop.