The battery indeed by no means (at least on intel 11th, 12th gen cpus) is what I would call exceptional by any means (4-9 hours on a i5 1240p with two USB-A, two USB-C passive modules). Some expansion modules such as the microSD reader can be a detriment to battery life overall as well as some modules (like the older revision of the HDMI module) have issues not powering off for power saving properly.

For the HDMI module, Framework has published a guide for those that wish to mod their older revision HDMI modules to get power saving to work like how it does on the new revision. As such, there is hope that for those skilled enough to do their own repairs that the worse off modules today may be able to be made better tomorrow rather than thrown away for a new revision.