@Framework, seems like the HDMI expansion card is taking up around 1W of power (with no HDMI cable plugged in), which seems quite high. Did a ton of A/B tests on both Fedora and Windows, but basically idle and normal usage discharge rates are ~1W higher with the HDMI expansion card plugged in, vs. without.
The USB-C and USB-A cards seem to draw a negligible difference.
Right now, I’m running with the HDMI expansion card unplugged, and I don’t have another card to fill that hole 
. Also, is there any way to disable the HDMI card from drawing power? Tried a few things in Windows and Linux (using Powertop: Tunables tab, turn “Bad” to “Good” for “Autosuspend for USB device HDMI Expansion Card [Framework]”), but doesn’t seem to help.
Some general battery life information:
I’ve done a fair share of testing battery discharge rates in both Windows and Linux.
Will do a longer write up later, but tldr:
PSR (Panel Self Refresh) saves about 0.5W, which works in Windows but unfortunately is broken (stuttering issues) in Linux for now.
Have been able to hit peak low idle discharge rates (5% display brightness, keyboard light off, 2x8GB 2400MHz (to upgrade soon 
), PSR on):
Fedora 34: ~2.2W (so ~2.8W with faulty PSR off)
Windows 10: ~2.6W
But usually it’s around 3W-4W. Seems PSR is needed to achieve C10 states, which save that extra ~0.5W. If PSR is off, only C8 can be achieved. Can check C-States via Powertop on Linux, or ThrottleStop on Windows.
Power profiles:
Windows: battery saver mode
Fedora: I’m using Bastien Nocera / power-profiles-daemon · GitLab and using the “power-saver” mode