What model laptop is it? Is the battery management on performance or battery saving? This used to be a frequent problem in the 2000s with Linux but I thought i

What model laptop is it? Is the battery management on performance or battery saving? This used to be a frequent problem in the 2000s with Linux but I thought it was largely fixed except on the very newest laptops (takes 3-6 months for kinks to be worked out in my experience after a laptops release).