I'm not sure whether everything is right there regarding that Librem 5 unit - 40% of the battery eaten in 3 hours with screen off is way faster than what I see here on my phones (disclaimer: I work for Purism). None of my phones also get as hot as described, so that may be related. I'd be interested in seeing power consumption data (`tail -n+0 /sys/class/power_supply/*/uevent`) and thermal data (`gthcli`) in various idle states from that unit. I haven't done any exact battery tests recently, but from my experience I can easily reach screen off time of more than 10-15 hours and screen on time of 5-6 hours depending on what stays on, and the phone usually stays cool unless I leave it in bed under a blanket at which point it can get pretty hot after a few hours (but still not burning to touch).