iPhone 12 battery draining fast

earthberth wrote:

This is so strange...

At home in Germany I have the constant drain (Congstar T-Mobile 4G).

Yesterday I went to Czech Republic, used the phone for navigation (about 7 hours) and had still 25% battery in the evening.

And here in Czechia (T-Mobile CZ 4G) everything’s fine. No abnormal drain...

So the problem doesn’t seem to be 4G in general but just in some places.

Please see my post above relating to variable battery consumption due to changes in transmit power commanded by the network. Also remember if you are roaming away from your home network you might see increased consumption because the phone is constantly scanning for the preferred home network, which also adds some extra battery load.

Tbh, i may have let go of the lock button after screen went totally black. Then after waiting about 5 sec, apple logo never appeared. So I kinda pressed on the power/lock button bc of that. So far on day 2, it again prevented the drain during my sleep last night so I guess it kinda went well. Let me know about yours.

HalphPint wrote:

What exactly did you do?

I 've done nothing on my side, but I referred to those who have done a hard reset.

After all, an iPhone is a computer so when it bugs you just have to restart it ... until the next one!

It is a temporary fix, maybe when you are back in a well covered area from an area with less coverage. I make assumption ;)

Sim inserted on both phones although the 12 pro max sim is no longer active but still drains just as easily with cellular data off and on wifi. 11 pro max is a battery champ per usual with sim active and cellular data on and connected to wifi.

Basically the battery difference between these two phones is pretty drastic and it doesn't seem like a software bug to me if my 11 pro max is acting just fine but my 2nd 12 pro max is still a drainer.

Please call and get through to a senior advisor, the more people who report this, then they will take action.

I did today, and was told that support advisor had not heard of the issue before, but when logging it to engineering, saw that there have been other reports, so PLEASE report it to Apple. The more they hear about it, more effort will be made to solve it.

It will not help everyone here but at least it will give hope... I think it is really not a hardware issue but a software one or even a bug of the modem.

Indeed I experienced it out of the box, a few days after when the phone had completed indexation to be precise, and I faced such drain on my 12 Pro Max :

Then I switch back to my 11 Pro Max which of course worked better. After one week, I went back to 12 Pro Max (each time from a finder back up) and now I get this which is more close to an "allowable" behavior knowing that the battery is smaller on 12 than on 11. Please not that I haven't adapt the settings, I don't turn anything off in comparison to my previous settings and I have 2 SIMs :

I truly think that the 12 (Pro Max) will never have the endurance of the 11 (Pro Max), I just hope it will stop to loose battery (even a single %) per night when in sleep mode with do not disturb activated ... as my 11 Pro Max did after a charge.

Here is how the 11 Pro Max with same setting BUT no SIM behaves in idle, we can see that after having fallen from 100%, there is a regular and constant battery use.

Some report that next beta version of IOS fix it, but not all.

PLEASE call apple support and get to a senior person, then ensure they log it.

the more times they hear about it, the more effort will be put into a solution

advisor i spoke to had not heard of the problem but when logging it as a report to apple engineering noted that there are other similar reports .

So after I returned my iPhone 12 mini a few days ago, I got an iPhone 11 pro on iOS 13.6.

The difference in battery consumption was night and day. I would loose only 2-3% over night.

I thought this was it and upgraded my 11 pro to 14.3.

However, now I am facing the same constant battery drain on my 11 pro that I experienced with my 12 mini before. It is not dramatic but I loose ~1% per hour on standby. This is definitely worse compared to what I got on 13.6.

So what I'm saying is that I'm not sure whether this issue only affects the 12 lineup exclusively. To me it appears that it could also be a general flaw in ios 14.3 or 14 in general.

Apple really has to get their *** together and solve this ASAP!

Maybe this is Apple's way of saying "Stay home" lol

If you are connected to Wifi, turn on airplane mode (wifi and Bluetooth will disable by default but if you turn them back on, iOS will memorize and leave them enabled the next time you enable airplane mode), make sure wifi calling is enabled, that should route all the calls and text messages to your phone through Wifi even though your phone is not actively connected to a cell tower. Works for me. No more drain, and still able to make and receive calls. Its more of a temporary solution but its the best/only thing that works. Of course we have already assessed that turning on airplane mode is the solution to stopping the drain, but as of recently I thought that that means you can't make calls etc, which isn't the case.

Unfortunately there is no possibility to program an automation in shortcuts to disable airplane mode when Wifi disconnects, only the other way around.

Me too... That's why i am giving a hard time calling and emailing Apple, and this is what everyone with this problem should be doing and discussing here the experience that they have with Apple.

There are 130 pages on this subject here, and is established that this is an Apple problem and the client should not be messing with settings and be happy with a "little better".

[Edited by Moderator]

Talked to Apple service via chat.

I explained that after updating to iOS14.3 a month ago my battery is draining a lot more than with iOS14.2.1.

They did some diagnostics (actually twice as after the first diagnosis the chat connection broke down) but both supervisors said that the standby battery drain on my 12 mini looks suspicious and obviously only flight mode helps.

They tried to set a callback from engineering but they did not contact me yet.

Now they are outside the service hours so I will wait until tomorrow and call the support.

But reading that even the replacement phones are not working properly I am losing hope.

A friend of mine has exactly the same combination of iPhone 12 mini and Congstar as a carrier (Telekom Network in Germany) and has great battery life - just as I did until mid of December...

It looks more like a software bug in iOS 14.3.

I no longer experience huge battery drains in idle mode after I changed my carrier from O2 to EE here in UK.

And battery life has been good so far (~1.5 days) on my iPhone 12 Pro for almost a week now.

Of course, this is not normal or expected to change carrier in order to achieve normal battery life and Apple must fix this!

If you have not already, Please raise the issue with Apple support and keep on pestering them and insist that the issue is reported to engineering

i did and support rep, who had not heard of the problem raised a ticket and then said " Oh i see others have reported this "

Anyone here with 11 pro experiencing 20-25% battery drain on iOS 14 in idle when no apps running in background?

I've seen some complains earlier with SE 2020 being affected by iOS 14 with a similar battery graph to the 12's. But I don't remember seeing that from 11, mostly complaints about up to 10% which is nothing compared to the 25% we see here.

One thing is absolutely clear about the 12 lineup, they all have flawed Qualcomm X55 modem which causes massive battery drain depending on cellular network configuration in the area or antenna location (whatever it is).

Guess what? 137 pages of battery drain topic, so yes, others are expecting the same problem. Nevertheless, it will be good, you as a new owner, to report your problem directly to Apple support in order to increase quantity of cases and pressure on them.