iPhone 12 battery draining fast

nothing changed for me with 14.3 :( the only thing that helps is using 3G, the phone lasts for 2 days then (but it's not perfect solution, I need 4G in 2020 :)). when I switch to LTE the phone starts losing 1% per about 30 min in idle, that's insane. and with 3G enabled I can still see some battery drain, it is especially visible during the night, 5-6% when being idle for 8 hours with everything disabled. My husband has a watch connected via bluetooth, Wi-Fi on and he loses the same 5% during the night (and he uses 4G, not 3G as I do)! I have iPhone 12 mini, he has 12 pro, we both have the same carrier - Vodafone Ukraine. I can't see any carrier update under Setting > General > About

Hi,

did you notice upside on the right corner where is the indicator for network connectivity it's shows you that you have only two from four!

I've noticed that yesterday, i'm iphone 12 mini owner and almost always im not having full carrier connection !? It may comes from that reason to loose battery without using the phone at all..

I'm not sure, but if anyone can share with us if there is similar problem like us.

Can confirm that 2 bars makes no difference. Why? 2 bars on my 11 Pro Max...no drain. 2 bars on my 12 Pro Max...insane 15% per night drain (and constant drain during the day as well). The network isn't the issue here, it's the phone!

Hi

I’m also on sky mobile but can’t find the carrier settings on my IPhone 12 Pro

I have looked at Settings-General-About but can’t find the carrier setting.

Any pointers would be welcome please.

I too have updated to IOS 14.3 and seen a great improvement in battery drain since the update

but would like to see the New Carrier settings.

Maxwilkes92,

I am locked into AT&T and have ordered and received a new SIM card to replace the one I had. You don’t need a new carriers SIM card to test if the issue is related to a bad SIM card. You just need to contact your cell Vodafone and request they send you a SIM card. They will help you set it up for your phone and then you can see if your old SIM card was the issue.

From Toronto, Canada

When I upgraded to 14.2, I noticed a huge battery drain overnight on standby anywhere from 10%-20% on iPhone 12 Mini.

Upgraded to 14.3, and after one night it dropped only 5% in 7 hours of idleness (without wifi, only LTE).

Will see tonight whether it is the same case.

The best energy consumption of iPhone 12 and 12 Pro models we can hope for is around 1% in 2 hours (that is 9-10 days on standby). So yeah, 6% in 8 hours is quite close to the slowest (i.e. 4% in 8 hours).

So,being reading the latest posts and this is the conclusion:

• Those who have 14.3, the drain dropped from 15/20% during night to 4/6% (including me)
• Those o think their phone is better after installing F.4 are wrong...it is the same behaviour as 14.3
• Yes, in 14.3 helped but is not the solution...maybe is in the final public release of F.4
• During the day the battery drain continues more obvious and more rapid
• Apple clients should not be messing with settings just to get a better experience with the battery.

[Edited by Moderator]

It would be very interesting to see if the battery drain remains the same after the phone is no longer connected to iCloud. I would test but I do not have a 12

Changes in iCloud can impact performance of an iPhone, iPad, Mac making it feel like you have malware operating in your machine changing how it performs.

Have had some calls with Apple support today.

battery issues with 12pro and 12 pro max, both bought 11 days ago. Support could not see any battery faults. I tried backup, reset and restore which has not fixed it . I see other posts about IOS 14.4 Beta, but support advised against this.

Apple have agreed to ship 2 new phones and then i return old ones. Hope that resolves issue, but as an electronics engineer i still think that there is something in background draining the battery . Will see. Apple support staff have been very good and a senior guy is keeping in contact with me until it is resolved.

This issue isn’t iCloud related. I’m 100% sure that this battery drain issue is being caused by the Qualcomm X55 modem. For me, the only questions remaining are 1. Will Apple officially acknowledge this problem?

2 will Apple be able to fix this problem with a software update.

The Qualcomm X55 modem has proven to be very problematic on Android flagships. There doesn’t seem to be any improvement with the X55 on the iPhone 12 series. It’s disheartening because it takes away from people just being able to enjoy their new iPhones.

I haven’t contacted Apple support yet because, for me, there’s no point until Apple acknowledge there is a problem. The very best Apple support can do is send me a replacement iPhone 12 Pro Max out which will have the same problem. This problem is clearly related to hardware.

Fingers crossed Apple acknowledge this issue soon. I bet we will see a lot! More people suffering with this problem after the holidays when people have received iPhone 12 series as gifts etc.

oli1605 wrote:

I don't understand why this is happening when I am constantly connected to wifi.

Because even when you are using wi-fi for data, the phone is still maintaining a 4G/5G connection to the cellular network for registration purposes, so the network knows in which cell your phone is and so it can route incoming calls to it.

bernadett181 wrote:

Hi all,

i would ask those who use iphone 12/12 pro with dual sim.

You also included in the battery usage statistics that “No mobile coverage”?

https://discussions.apple.com/content/attachment/e3c5936e-94c7-4cc1-81a9-39b4cec069c9

11 hours screen activity including a big battery load from Facebook is not too shameful. It reminds me that FB always used to be a serious battery hog, doing a lot of invisible background traffic while checking over cellular. If you think that might be contributing to battery drain you could try denying network access overnight and see what happens, or even for test remove Facebook (and/or other suspects) altogether.

When we see consistent reports from vanilla out-of-box devices I will be more convinced this could be a hardware problem. Until that stage my prime suspect is still around third party software and unexpected network activity.

I held back in getting the 12 Pro because of the apparent battery life issues posted on this and other forums. I picked up my 12 pro two weeks ago and it’s been superb. I came from the 11 pro which had superb battery life but I think the 12 pro almost equal but perhaps marginally less in terms of life (I still have 50% at end of most days). I’ve 5G turned off as I don’t need it and background app refresh off. It’s a very snappy phone and in my opinion is quite a big upgrade from the 11 Pro though I note many others may differ in opinion. I’d have no hesitation about recommending this handset.

On my side, I have bee, back on my iPhone 11 Pro Max for the all last week in order to compare its battery life to the one I experience on the 12 Pro Max, and I have to say that in my remembers he was performing well...

In my souvenir, he was able to stay at 100% all night if unplugged just before sleep and that was not the cas last week. From 100% it usually lost approx. 2% and approx. 5% if not at 100%.

It has been restored from a finder back up of my 12 Pro Max in iOS 14 and use as below :

• dual sim from the same french carrier,
• background refresh for a third of the installed app,
• wifi and Bluetooth activated all time but not always connected of course,
• even by night, but do not disturb and sleep mode are activated.

I usually saw a drain of approx. 5% per night in those conditions. I have also tried to set data on the eSIM or on the other but I didn't see any measurable difference.

So I went back to the iPhone 12 Pro Max on Saturday via the same protocol and let it plugged in all night to Sunday and as most as possible during Sunday in order to allow him to complete the indexation process. Once it was done for the picture, I unplugged it at 6:30pm yesterday, used it a little and went to sleep at 11:30pm with 94%. I wake-up this morning with 89%.

Now at 10:55am I am at 82% with a very moderate use.

here are some battery use graph from the last week with the 11 Pro Max

And this one is from the 12 Pro Max a few minutes ago

I know it is not helping here, but I have unfortunately to admit that this seems very similar.

I expected both to have a better endurance with such a light use but it is not the case, or I can even say it is no longer the case for the 11 Pro Max.

Maybe some of the changes introduced by iOS 14.3 and the associated carrier updates have impacted the older iPhones.

Once again, I remembered as many other people here that the 11 Pro Max performed much better, but this was before the iPhone 12 :(