I also have an Alienware and I had the same experience until I spent a lot of time tuning battery life, now I can get 7-9 hours of autonomy. If you want, I can

I also have an Alienware and I had the same experience until I spent a lot of time tuning battery life, now I can get 7-9 hours of autonomy. If you want, I can share my setup with you to spare you the trouble.