If you normalize for performance the ryzen 4000 laptops should have considerably better battery life than comparable intel models, at least while under load if not idle.
Most people want to know how long it lasts on a charge. If it lasted 30 minutes but was the cheapest, literally nobody would say "If you normalize for cost, it lasts the longest".
How long it lasts on a charge obviously depends on what you're doing with it. Normalizing for performance gives you the efficiency of the system for getting work done.
Compiling/testing software is part of my job, so whether a laptop can complete 200 compiles on battery power or 500 is something I care about. If you only care about how long a laptop can idle for under battery you might as well take a screenshot, print it out and you've got yourself a couple thousand years of 'battery life'.
Good point, but by context, wasn't GP talking about the same load?
If somebody says "The battery performance is poor" I don't assume they go from compiling all day to writing in Notepad when making the comparison - I assumed they meant "For the work the laptop was purchased for".
https://www.anandtech.com/show/15624/amd-details-renoir-the-...