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My battery last night. Confusing.
 

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I’m also having high drain overnight.
Around 17% most nights, crazy as I also have a shortcut to turn off Bluetooth to my watch and low power mode on too.
ny old 11 pm would lose maybe 2% in those settings
 
This has to be a software issue surely? If it’s a hardware one then apple may have a big issue on their hands
 
ok was just wondering cuz I also found a thread on the Apple support forum and people blamed the usage of two sims

That’s not the case. I’ve been using eSIM and physical SIM card together since it came out with 8 plus. Never had an issue.
 
I have exactly these overnight stand-by drains (between 10 to 20%) on 8 weeks old SE 2020. I guess and hope it's a software issue. It started right after updating to iOS 14 and continues on all subsequent versions, even on current 14.3 public beta. Erasing the phone, turning off bluetooth, exposure notification, entering low-power mode etc. etc. seem to have no effect.
 
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the really weird thing is it only seems to drain bad at night, during the day I get maybe 2% at most from 2 hours standby, it’s about 3 times that during the night! Could it be sleep tracking or something??
I’ve just gone into sleep schedule setting in the health app, and I found that “track time in bed with my iPhone” was on....going to turn that off and I’ll report back tomorrow
 
I have DND on, but other than that, I have not put into airplane mode or turned off the 5G to only LTE (there is no 5G in my area), but I still lose 5% each night. It’s gotten better as it was 20-25% before the 14.2.1 update.

5% isn’t bad, but on my 11PM, I would lose 0%. It has to be software and just wondering if it is the 5G. Maybe I will try turning that off tonight and leave it as LTE.
 
Yeah the automatic cloud back up clearly states it will only occur when the phone is connected to power, locked and on Wi-Fi.
 
Mine backed up last night off charge as well. Just checked and it backed up last evening. My 12PM hasn’t been on a charger since the morning before.
 
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Just left my phone in standby for 2 hours. It’s mid afternoon here in uk. It only lost 1%, and that’s with everything on, 4g, Wi-Fi, Apple Watch the lot
It’s definitely something to do with sleep mode I’m convinced
 
I checked mine also, and it did it when I was connected to power so it’s not the cause of my drain at least
 
In any case, an incremental backup will be quite small and unlikely to use as much battery as we are seeing
 
Its settled to about 9% for me on iPhone 12;

Funnily, its more than my old iPhone X. X loses about 5-6% of battery overnight. Both kept next to each other and in reality, they are mirror of each other. All same apps, same background processes enabled/disabled, etc.

And both, I charge them to 80%; I have created a device automation to speak an alert once the phone is charged to 80%

edit: And I am not in 5G enabled country at the moment. Both are on 4G Antennas (wifi in fact when at home)
 
For most of the time, i guess it is Siri background activity which drained your battery no matter it is turned on or off. It is the chipping learning activity I suspect
 
Maybe due to background apps the battery drains at night. You can try to disable the background apps in the setting.
 
Never had background refresh enabled since it was introduced
But then, what's the fun in having a high end smart phone if your apps are not able to periodically refresh information without opening the app.

I guess not for all but, for certain apps like news sites, or twitter, WhatsApp, etc, background refresh is such a useful thing.

Again, not trying to sell background app refresh, just wanting to know..
 
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