S9 Overnight Battery Lose

[Android Central Question]

I’ve had my S9 for about a month now. It keeps losing charge overnight (7-10%) even though I have AOD off and flight mode on.
I don’t know if it’s a problem in the battery or something else, I’ve also checked what’s draining my battery in settings and no clues.
Anybody else experiencing this?

 

[belodion]

Yes, I’ve experienced it on a Lumia 550, and furthermore the same with the phone powered off and even with the battery out of the phone. Then, for no reason known to me, the trouble stopped.

Does yours lose with the phone powered off?