iPhone 12 battery draining fast

Different carriers indeed do offer different options when it comes to 3G/4G(LTE)/5G. The difference in your available options reflect that. I have a dual SIM situation and depending on the carrier (Data Plan) option I select, I have different Voice & Data options. In a nutshell, it's carrier dependent and is not directly connected to the battery drain issue. What might be happening though, is that the phone communicates with different carriers in different ways and the battery load thus might be different.

that’s my mobile data setting. Don’t have 5G contract.

before I had 20-30% drain overnight.

you can see a drain over the day with light usage.

At Home I used airplane mode to stop the drain.

today I will see the drain over the day.

Fingers crossed 🤞🏻.

Today I did some testing with idle battery consumption on iOS 14.4 (iPhone 12 mini), which I installed yesterday. I had noticeable drainage on iOS 14.3 since I purchased the product and disabled the mobile connection via airplane mode most of the time as a temporary solution. Now I can't really tell the difference between enabling and disabling airplane mode.

9:00 to 11:00: Airplane mode on, WiFi on, Bluetooth on

11:00 to 13:00: Airplane mode off, WiFi on, Bluetooth on

13:00 to 15:00: Airplane mode on, WiFi on, Bluetooth on

15:00 to 17:00: Airplane mode off, WiFi on, Bluetooth on

It was exactly this i was afraid of...

Yes, iOS 14.4 is much better, but is not the solution.

Do you keep loosing 5% to 7% during the night ?

Do you think, on iPhone mini, ending the day with 3h30m with screen-on time and battery at 20% is ok?

Please check the battery performance during a week and then take your conclusion.

I have been using this update for two weeks and i am not happy... an expensive phone like this should be perfect and not just "OK"

same here on two iphone 12 pro ( mine and my wifes)

if you look at settings, battery usage graph clearly levels out for a period when you are not using phone, whereas before ( IOS 14.4) it constantly went down

14.4, 2nd night 4% loss within 6-7 hours. That’s good enough!

the only bad thing about all this: the absolut Bad, disappointing Communication by apple about this bug. Lots of Frustration and replacements could been avoided.

advertising the small box with better emissions but forcing people to replace a huge amount of phones, because of a stubborn silenced company- that’s kinda schizophrenic.

Hi guys. I am an owner of 12 max pro since 17/01 (12 days now) and I have to say that I am not that impressed with the battery. From a lot of comments and reviews I was expecting a real beast in terms of battery performance but unfortunately that is not the case. While I do not experience this huge battery drain overnight (like 12pro`s) it still loses 2-3% for 6.5 hours overnight and the first hour after getting up with a just a little bit of a scrolling in facebook etc it loses like 1% in 10 minutes. I am working from home so it is constantly on wi-fi, i imagine what will happen outside on LTE (we still do not have 5G in my country).

I wonder why an entirely new phone loses even 1% on a total standby when it is not used at all? For instance my 3,5year old 8+ without using can take up to 24 hours on idle to get 1% down.

I know that here are people with worse battery problems but how is this even possible, 3,5y old phone against 10 days old which is presented to be with a monstrous battery. And everytime I scroll a bit and take a look at the battery % it is down 1%. I thought this should last 2 full days with a loooooot of tasking on it ( mostly on 4G, not wifi). I do not play games, just youtube, spotify , facebook, messanger and viber thats all.

I can see that there are people who get 0% decrease while on idle( no matter time frame). Interesting.

Yes, I did. It is up to date.

It was 100% at 00:00 last night, took it off the charger, 98% at the morning at 09:00. From 09:00AM till now - 12:55PM with just 45 min Screen On (absolutely not touched besides that) is at 91%. I mean, it is not like I am losing like the other people 10-20-30% overnight (but it is a Pro Max model - which is not known to have any issues like 12 pro), but come on, for a phone that should be very durable with heavy usage, 7% for 45 minutes just chatting in messanger and reading articles... (without any games or videos or music or phone calls). For sure my 8+ had the same performance at least. All the time on Wi-fi, Cellular data is completely off. Europen model with only 1 sim.

I decided to listen some radio online while walking, so Airpods in en meaning not wifi but through ‘the air’ of course as I am outside walking. I listened exactly seven minutes, then decided to stop. In that seven miniutes my charge dropped from 95% to 82%... 13% drop in seven minutes.

I use 14.4 with latest modem software already a week (public) so it is settled in. Siri disabled background processe off.

Wath a bad iPhone this 12 is!

same issue here.....OK in standby (since 14.3) but with 14.4 RC (it was better with b2?!) it loses 1%/6min in a call whereas it was 1%/12min in the past!!!! And even when replying to some text or mailing it drops relatively fast......I ma quite sure that it was better with b2....

what is your experience during calls? (I think that it is due to the option of having 4g on during calls!!!)

cheers

Now, a few days after installing 14.4 public release, the situation seems to have improved somewhat on my 12 Pro. I now went from 100% to 90% between midnight and 8am, with zero activity. While happy for the improved situation (it used to be 65% overnight) I am still wondering where that 10% went. My old iPhone X in the same period and with very similar settings only spent about 2%.

The little activity shown overnight is registered as Home & Lock Screen. I don't understand that since I never touched the phone and I see no traces of anything that could have "woken up" the phone, e.g. notifications, automation etc.

Be careful with that, it is not a good idea to constantly let your battery go below 20% or even 30%. Mine last 1,5 days, if i let it to fall below 10% I will easily make it 2 days. But I am working from home and all the time on Wi-Fi. However, i get somewhere between 3,5 and 5 hrs SOT per day. And maybe 1,5 hrs Screen off.

14.4 does not fix battery drain for me on O2.

I ordered O2 SIM card out of curiosity hoping it would not drain anymore but unfortunately it still does. I lost about 15% over 6 hours from 1 am to 7 am.

And I don’t experience battery drain on EE, luckily.

Since i have been using 14.4 RC i have been telling that was better, the lost of percentage during the night was about 4% to 6% , it was an improvement, but not a fix.

So, today i wake up to this, same settings has always, and a 30% loss during the night.

This is not acceptable, by far the worst iphone i have ever had, so inconsistent.

SHAME..

[Edited by Moderator]

And also depending on how bright your display was, it is known that the camera app does consume a lot of power unfortunately. And also a bright display will increase the battery consumption immensely no matter what you are doing on your device. I would say, having the phone sit on full brightness, with no auto lock and just sitting on the home screen for 10 minutes, it would consume the same amount of power as if you are actively using the camera app while only on 30 or 40% brightness.

But because there is a software or modem or carrier bug, it is very likely that the high battery consumption while only taking pictures is not completely due to using the camera app per se.