Under the final section:
>>The ugly
Only 61 percent the battery life of a similarly configured XPS 13> In our battery test, which sets the laptop’s screen brightness to 150 nits and tasks it with endlessly browsing the web via Wi-Fi, the Framework lasted 10 hours and 17 minutes. That’s better than the Dell XPS 13 (7:59)
https://www.tomsguide.com/reviews/framework-laptop-review-th...
Maybe the XPS 13 configuration was different? Or maybe the tests were different in nature? Ars used PCMark 10, which is a standard benchmark that Dell could have specifically optimized for.
The Ars review does have this to say later on:
> The Framework also manages surprisingly high battery life under Ubuntu—in our semi-scientific video playback test, Framework runs neck and neck with the outstanding Acer Swift 3 at just over five hours, with everything else (including the XPS 13, which in this case is hampered by a 4k touchscreen display) trailing well behind.
The only laptop for which that seems to be true is the MacBook, but no x86 laptop will come close to that. From what I've seen the Framework has a mostly uninteresting battery life, outperforming some likely competitors (like Dell's XPS 13 and MS's Surface Laptop) and outperformed by others (like HP's ProBook x360 and ASUS's Zenbook 13).