Yeah. 11th gen Framework 13, so one of the first ones. Since I got it I had to use Windows exclusively because of some client work, and battery life was pitiful. 2-3 hours perhaps? Once that project finished I swapped out the SSD and put on Ubuntu with KDE. I was expecting the batter life to be worse, but it is demonstrably better. I now get more like 6 hours, albeit with my power plan on efficiency.
I have one of the newer AMD models and I find it has about 2-3 hours of batter life, though it spends most of it’s time suspended for my use case. I use Fedora and have the “balanced” profile selected. I don’t mind the poor battery life since the processor is leaps and bounds better than the 6th gen 2 core Intel I was using before.