I lose about 30% overnight if I don't get it on the charger at home, and less than 5% if I leave it alone on my desk the nights that I work.
The huge difference is the fact that LTE at work is solid coverage. At home I have spotty, if any, coverage, and rely on wifi (kept on while phone sleeps) always active for wifi-calling.
If I remember to put it on airplane mode with wifi on, It loses 10-15% overnight. Of course, if I just turn it off before I go to sleep, I get to sleep in (it's my alarm after all), but loses 0-1% overnight and most of the morning