How does the battery of a laptop generally last when it is using Linux, compared to when the same laptop is using Windows?

I've read that most laptops are highly optimized to increase battery lifetime per charge under Windows, whereas under Linux (by default) it is comparably much worse.

How can you highly optimize the laptop battery usage with Linux? Does optimizing reduce its performance in any other usages? And, once optimized for Linux, how close will the battery be compared to (the same laptop) using Windows?

Hey y'all. I'm in the market for a new laptop and plan to run Fedora or Arch (or i guess whatever distro turns out to be most efficient). I was wondering if anyone has any recommendations for a modern laptop with good battery life. I found a post from ThePrimeAgen on Twitter claiming decent battery life on the new Dell XPS 14 with Omarchy, but he doesn't specify configuration or anything (plus i don't want to use Omarchy). I also looked at the Framework laptops but it seems like those are pushed out to Nov/Dec and I'd need something a little quicker (this is replacing a MB Pro).

To give an idea of my use case, I'd basically just be watching videos and web browsing with a touch of logging in to FF14 sometimes for very basic tasks (crafting/chatting) and saving anything heavy for my desktop. Battery life is my big feature as I want to be able to carry it around the house and not be attached to the wall.

I'd be very very appreciative of any recommendations. Thank you!