Same here. I used to top up my Galaxy S4 at work, yet the Note 4 I can leave the charger, go to work, get back home at around past 17:00 still have around 75-85% charge depending on how I was using it, then use it heavily at home and by the time I go to bed at around 22:30 it's sitting anywhere between 35-45% charge, it can easily do 1.5days of moderate to heavy use.
It certainly lasts a lot longer than my friends Galaxy S4s, S5s, Note 3s and iPhone 6. A colleague of mine got his iPhone 6 a few weeks after I got my Note 4, he noticed that I never charged my phone at work yet by mid day his iPhone is at around 50%, at that point the Note is still sitting anywhere between 93-88%
TJ99
Do you have a N910C or N910F?
I know the C apparently chows quite a bit of battery even in stand by.