iPhone 12 battery draining fast

I have had the same problem with the iphone 12. Same graphs and same drastic drain overnight. Even turned off WiFi to no avail.

I exchanged phone hoping it was faulty but replacement was only very slightly better. With no use, it still needed to be charged daily.

Gave up and exchanged for an iphone11 which hopefully is proven not to be so bad.

Frankly, the problems experienced with the 12 makes it unfit for purpose. My retailer agreed and refunded it all.

On Macrumors forum Someone said he lose only 1% overnight with 14.3 rc, while before 10-20%.

In my experience with 14.2.1 i lose 1%/h in stand by.

5-7% in 6-8 hours overnight.

11% in 40 min call.

Last night i lost 4% in airplane mode!

(I found it at 29 from 31%, but I did an hard reset and it falled to 27% in a while!)

I have just installed the iOS 14.3 update, soon after I had a prompt for Network Provider Settings Update.

modem firmware is bumped up from 1.14.06 to 1.31.03-5

Carrier bumped up from giffgaff 44 to giffgaff 45.1

iphone 12 here on giffgaff U.K. (4G)

Will see tonight how the battery fares...

Replacement 1 iPhone 12 Pro Max

Night 5 Restored from backup, so on iOS 14.2.1 now. Still manually selected O2 and 3G in mobile settings, mobile data turned off. Also set low power mode. Connected to home wifi.

Apps exited, background refresh off.

14-12-20 22:10 battery 89% left on

15-12-20 09:10 battery 86% left on.

That’s better. Will try putting it on 4G tonight and see what happens. Not expecting much from 14.3, that level of update is aimed more at releasing new features. 14.3.1 might have a proper fix. The hardware seems ok, it’s the software that needs fixing. Even if there is a modem problem, they should be able to code around it. Will try Wednesday though.

I agree with you 100% on this.

I have been using Twitter and tagging everyone relevant, Apple Support, Tech Reviewers and every channel that i can think of, so it can help spread the word about this.

But i think everybody should use Apple support channels as must you can.

Here in Portugal i don’t have an Apple Store, so i can’t do a presence complaint, but to those who can DO IT .

This as to be reported non stop.

Try to disable WiFi while at home (no flight mode, just WLAN / WiFI connection). Doing this stops the drain at least for me, though this is of course not an acceptable solution, but I still have not figured out why the iPhone battery begins draining when I'm on my personal network.

Selzere wrote:

Even for your friend, loosing 5% during night is a moderate drain but is still not normal...

It certainly can be. It all depends on the particular situation. Depending on things like signal strength and background tasks, a fair bit of battery could be used.

With a similar configuration, except I had dual SIM, on a 11 Pro Max I remained at 100% or exceptionally at 99% during a night in idle.

With my 12 Pro Max I loose 20% ...

They are different pieces of hardware. The experiences will be different.

THIRD replacement iPhone 12 Pro Max. On 14.2.1 it drained roughly 15% overnight. Held out for the release of 14.3 in case it solved the problem so eagerly updated when it was released....unfortunately issue remains. Last night went to bed at 01:00 with 72% battery, woke up this morning with 59% battery! I am now returning my phone for the last time and cancelling my contract. Well done apple, you’ve lost a customer. And more will follow if you don’t hurry up and fix this issue! Vodafone UK network. Single physical SIM. Not even in a 5G area. Old 11 Pro Max loses only 2-3%!!! So it’s not the network!!!

Guys, I´ve been following this thread since the beginning.

First post, to share my experience:

I have an grey iPhone 12 Pro 256GB, bought about a month ago. Setup as new, no iCloud backup.

Two sims, with two operators here in Spain, physical DigiMobil and esim Orange.

I´ve been having unacceptable high drain during day and night (its easier to notice at night but happens during day as well).

Drain only stopped when plane mode is activated.

I´ve updated to 14.3 on Monday and both nights the drain was reduced significantly

BUT

I still get crazy drain as soon as I use the phone. Feels like Apple implemented a partial solution, to mask the drain during the night. I still can't believe how fast it drains along the day.

Two screenshots for the last two nights:

And this is the drain as soon as i start using the phone:

I can't believe how often Apple delivers a faulty device (hardware or software related).

Its getting really annoying. They keep increasing the products price every year but decreasing quality control.

I don't want to be betatesting a device I paid 1200$ for :-(

Hi nikolafromsliven,

• ’Reset’ the phone means to power the phone off then turn it back on.

• ‘Forced Reset’ requires the external phone buttons, on each side of the phone, to be pressed and released in a specific order to literally force a phone, that is hung, frozen, non-responsive, to power off then back on.

Neither of these RESETS will delete your phones data NOR should you delete your phones data as step in performing either reset.

The “RESET”s available in

Settings->General->RESET

will allow you to completely wipe/erase all the data from and on your phone and render the phone at ground zero requiring the phone be setup as if brand new.

I think you are right, the X55 seems to be the cause of all this mess...

It is funny to read this now : https://www.androidauthority.com/qualcomm-5g-powersave-959115/

Qualcomm 5G PowerSave promises 4G battery life on 5G phones

and

Qualcomm 5G PowerSave is supported by all smartphones using the Snapdragon 855/X50 5G modem pairing, and it will also be supported on devices using the brand-new X55 5G modem.

Bought iPhone 12 Pro and 12 pro max very recently ( for self and my wife) to replace almost 6 year old iPhone 6 which we both had.

batteries on both iPhone 12s are draining fast even overnight when not being used.

Apple support have suggested backing up, factory reset and then restore. I did that and no real change.

Apple seem to be in denial about this

Will Apple respond?

Bonjour Selzere,

I live in France too and I noted that I do not have the same behaviour on physical sim or on e-sim. The former is Orange and the latter SFR. Orange is main line (SFR secondary).

With cellular phone on Orange the idle consumption is about 3%/8hr but it is 5%/9hr on SFR.

Moreover, when calling on SFR (e-sim) the consumption is 1%/8-10min and on Orange is 1%/20min!!!!

Both constatations above are maybe linked to different carrier despite I am sure that on SFR I had better performances beforehand.....==> indeed I do not understand why the modem would not behave the same when being on physical or on e-sim.....

What did you note on your phone (vs the associated settings) despite you have both lines on Orange?

In fine, in your second picture, overnight there is a quite fast drain on iPhone 12 pro max.....I had the same on SFR line but only with 14.2.1 ==> have you checked if you have different “drains” depending on which sim (physical or e-sim) the cellular line is set? Could you check it out (this would be inetresting as you have the same operator for both).

Have you tried the f.4b1? any improvement as reported by other guys in this forum?

Thanks and à plus

NOTE: I am running on 14.3 and I had drain on 14.2.1 (SFR e-sim cellular active) ==> traducing into above data after restoring iPhone to new (no backup) with 14.3 s/w

I have a replacement 12 pro max coming as well but dont know if that is going to matter. Spoke with Apple today and they said they think the engineers are aware and trying to work on a fix for it now. I am very close to buying another 11 pro max just in case because that phone was great and now I wish I never traded it in.

If it’s Qualcomm modem, then the drain is fixable via software update: there is no drain in 3G and iPhones use the same modem for all standards( 3G, 4G, 5G). Modems have firmware. So they just need to fix their algorithms for 5G/4G