iPhone runs out at night. What's the matter?

Question

iPhone

iPhone 11.
I go to bed - 100%. I wake up and the phone shows 99%, but within half an hour with light loads (for example, look at the news through safari and answer messages in the cart), it drops to 90%.
If anything, the iPhone is new, from the store. In use for several days.

Already googled the problem and sort of turned off that unnecessary thing that can load the phone and eat charging, but somehow it didn’t really help. But I will be grateful if someone here shares the “secrets” of properly setting up the iPhone.

What else could be the problem? Or is it generally the norm?

Answer 1

And what's wrong with the fact that the phone is discharged without being connected to charging? It constantly exchanges data with the base station, showing that it is online, messengers receive new messages, photos are uploaded to the cloud ... Actually, a lot of things happen. With a weak signal, I have more than 10% of the charge eaten up overnight.
You can, of course, forcibly prohibit any data transfer, but then why do you need a smartphone? Just take it for granted that it will constantly consume the battery a little at a time.
And yet - the indications of the battery charge due to the measurement technique may differ under load and without load, and in general this is far from such an accurate figure as is commonly thought. By the way, watching the news via safari (thanks to today's clumsy web programmers) is not at all an easy load.

Answer 2

Turn off LTE. most likely you either have a bad network in the apartment or GPS is going to be in the background which thread

Answer 3

What is your battery condition? You need to look first at the battery, then the firmware, and only then at the power controller in the phone itself.