iPhone 12 battery draining fast

You are right, there is quite a bit of machine-learning like the examples that you highlight. However, as I said, there is no machine-learning functionality linked with battery discharging.

In any case, please have a look at my battery discharge below. That can't be explained away with "settling down a bit".

I updated to 14.4 and the previous 50% drain is completely gone. Now it’s only 5% in 12 hours.

So 14.4 may also solve your problem, too.

I also set Siri to - don’t listen. Not sure if this may also be the solution. I’ll switch it back on and report soon.

Full reception area (I can actually see the antenna tower from my window). My 3-year old iPhone X with depleted battery max. capacity (86%) and exactly the same settings/carrier etc. only consumes about 4% overnight:

My 2-year old iPad even less:

Over night, in 10 hours time just being idle, everything off like background tasks and Siri, latest ios and modemsoftware (can not discuss the very latest here) and 40% drain being idle.

Seems hardware to me...

Another weird thing happening

I had this steady drain again. Not quite as drastic but still suspicious. Normally in airplane mode the iPhone would drain around 5 percent but it was around 15ish today again. The point marked by the arrow indicates what I did at that exact time. Which was setting Mail accounts to ‘manual’. Not just on the bottom at the fetch schedule but also for each and every individual account.

I haven't followed the discussion in a while but wanted to give you guys an update. I had the battery drain issue with my 12 Pro since day one especially in dual sim mode. Have tried everything and by battery drain I refer to abnormal drain in idle. Around 6% per hour.

Now I bought an iPhone 12 Pro Max last week and the problem is gone. Even in dual SIM mode the battery is perfect. Idle use around 0.5% per hour. Exact same SIM setup and settings.

Below you see the idle drain at night with cellular on and both lines active. Of course during the day I'm using my phone but battery performance is great!

This leads me to the conclusion that it's not a firmware but a hardware problem with the modem. Unless they use different firmware between 12 Pro and 12 Pro Max which I doubt.

Well there is one difference, which should not make a different but I just want to mention. The 12 Pro was the US model A2341 and the 12 Pro Max is the EU model A2411.

I’m on EE, no battery drain, and these are the options I see. It’s a 5G capable SIM card. But I had O2 contract with 5G sim and the same options and still experienced battery drain.

Also, there was someone on EE still experiencing battery drain, I’m curious if they have 5G or 4G sim.

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

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.

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.

Not as bad this morning it used 12% battery through the night I went to bed with 50% battery woke up with 38% I haven’t a clue why it did what it did the 2 nights before. This is a screenshot from when it went from 80% to 20% the night before last night

iPhone 12 Mini:

On the day Apple released 14.4 I was about to return the device including the Apple Watch and switch to Android after 8 years of iPhones. I had 20-25% overnight drain with 14.3, now it‘s down to 6% with 14.4. Still don‘t know where the 6% come from, but I can live with that. More importantly, I get about 7.5 hrs screen on time at home/via wifi (2 hrs Youtube App, 1 hr Safari browsing, 1.5 hr call via carrier, 1 hour amazon app, 1 hr messaging and mail, plus other stuff), and still have about 20% battery life left. Apple Watch was paired for about 10 hours, Airpods for 3 hours. That‘s rather ok or would you expect other results?

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]