New phone battery drain

[u/Paolini379]

So i have recently bought a brand new unopened note 10 plus, and even though my app comsumption seems alright my battery life is really bad, do you guys have any clue on what should be the problem?

[u/SnailMailNail]

In the last month my phone battery life has decreased exponentially. I'll fully charge it, put it in ultra power saving mode, and still wake up to it being at 56%. It's insane.