Battery drain: Screen consuming battery when the phone is sleeping

[Svetlana Day]

Can someone help me figure out the issue I've been experiencing with my Galaxy Note 5? I'm on AT&T, all updates installed, not rooted. The phone is new, but I've been getting a lot of battery drain. I have the beta version of Greenify installed and aggressive Doze turned on; I use ShutApp whenever too many apps are running in the background. My screen brightness is controlled by Lux, and usually set at very low %.
I'm using GSAM to track the battery consumption, but I don't believe it's catching everything. The stock battery details is showing the screen as the main contributor to the battery drain, and the graph is steadily declining even when the screen is turned off. GSAM shows that the screen is consuming battery when it's turned off.
How is that possible?
I'll try to post some screenshots next

 

[libor332]

So what about AlwaysOn feature? Are you using it?

edit: Sorry about that.

 

[Svetlana Day]

The battery graph showing the steady decline. The steep drop is when the screen was actually on, but was off for 99% of the time shown in the steady decline

Here is the Screen view

GSAM showing consumption from last unplugged (this morning when I left home) and fully charged (some time last night)


And the screen details from GSAM showing that it's been on for 12 hours (or 5 days)


Also GSAM screenshots from last night, showing the same behavior (5 days on for the screen and 91% battery consumption


Thanks in advance for any tips!

 

[Svetlana Day]

No, not using AlwaysOn. It would make sense... and I wouldn't be asking. Actually, it's not even available on the Note 5

 

[kroalnumber2]

If it's any help, for me, moderate-heavy usage, Samsung S6 edge, I get roughly 3 and a half hours screen-on time out of a full 100% battery use. And with ONLY the Doze app, I lose around 2% overnight..

Did you post them screenshot after a full 100% use of the battery?

Also I apologise if you have and I've misread your graphs haha