My current laptop, a Dell Precision M3800 has it all: light weight, powerful, reasonable (if not fantastic) battery life, 4K screen, and native support for Linux, out of the box but it's hard to figure out what something the same size would be like at 1/4 the weight.
But I'm agreeing with other comments: I'd rather have this exact weight laptop with 3 days of battery life.
A few years back, I bought the phone with the very best battery life and I don't regret it one minute. Now on its third year, the phone still easily powers through a day with 50% or so battery life, and never leaves me high and dry when flying commercially which is when battery life is most important.
My next phone will be the phone with the best battery life Now that I finally have a powerful laptop that isn't also dreadfully heavy, battery life will once again be #1 for my next purchase.