Ciao Andremarty13. As far as charging power goes, you should get plenty of juice. The dock also seems like a good choice for upgrading your Alienware m15. I would venture to say that pretty much all current Dell docking stations are compatible with newer Dell notebooks. The docking stations are designed by Dell for certain notebooks and have been tested on them by Dell. Therefore, the manufacturer can say with certainty: Compatible for xyz. If you don't want to take the risk, I would suggest that you buy a universal dock.