$ cat /sys/power/mem_sleep
s2idle [deep]
$ /opt/batterylog/batterylog.py
Slept for 11.68 hours
Used 7.92 Wh, an average rate of 0.68 W
At 0.68/Wh drain you battery would be empty in 63.85 hours
For your 51.04 Wh battery this is 1.33%/hr or 31.87%/day
Expansion card composition and system configuration is as in the original post (no. 12 in this thread).
Dino