iPhone 12 battery draining fast

That is good to see. May I request you to please post a screenshot of your Cellular (Mobile) data options which is under Cellular (Mobile) data. I have this weird theory where the issue seems to be due to the options that are available under this section. Thanks in advance.

Finally as today I am expecting a call from the engineering team having said that yesterday I installed iOS 14.4 very surprisingly no drain happened last night at all,I can’t say the issue is resolved yet as I have already turned off all the notifications and background refresh including hey Siri so not yet very conclusive.. still very positive

People, being using 14.4 for a week,it's better but the drain continues, don't be happy with a little better and don't give up on calling Apple... and test the iOS with all settings turned on, as it should be... then you will see that the drain continues, not as massive as it was, but still there on standby.

Up until yesterday (January 27, 2021) my iPhone 12 Pro battery has been as good or better than my old iPhone X. I've had 5G turned off, that is, I've been using "standard data mode" since about the 2nd or 3rd day that I've had the phone.

Yesterday, while not using it any differently than usual, I noticed it was down to about 60% around noon. I checked and it had fully charged overnight, so this was definitely our of the ordinary. So, I recharged it to 100% and within 5 or 6 hours, after virtually not using it other than running normal items in the background, it was back down to about 65%. What's going on???

I actually found an apple support lady who called me back when she said she would.

downloaded diagnostic data to send to engineering. Still on IOS14.3.

She said i should update to IOS14.4 and repeat test tonight so she can get further data tomorrow

updated to 14.4 at 14:30 today, battery drain graph looking promising, will see what happens overnight

Further to my previous comment. 6hrs SOT is you use continuously. If you use sporadically, you won’t even get to close to 6hrs. This thing drains like crazy after the initial 100%-99%. If you use it once every 10mins, it loses 1% percentage even if you use it for 10 secs, especially if you trigger the LTE modem. So SOT takes a sharp dip. This phones are like this . I asked many people wherever I go who own the 12 series. They all say battery isn’t great but most of them will tell you, hey this is a phone. For the other stuff get an iPad. And believe it or not that makes up the majority of apple’s customers.

Hi, there aren’t people with 0%. Apple iPhones have this strange feature that when you charge eg to 84 % it takes forever to get to 83 % but then draining resumes at a normal or fast pace. Those who are claiming that have 0 % battery drain, are charging the phone, unplugging it and then you using that as reference. To get a clear picture, charge it, use it until it loses 1 percent then use that as reference to measure overnight drain

I have had this issue the past 2 nights and I haven’t a clue why, I charged my iPhone 12 mini to 70% went to bed woke up and it was on 20% I couldn’t get my head around why this was the case then i charged it to 80% watched one video in bed on YouTube then went sleep woke up and my phone was on 20% again, I updated my phone to 14.4 2 days ago and then this happened on 2 nights, I phone my network provider today and they said turn off bluetooth and location services and monitor it over the weekend, surely I shouldn’t have to do this as this as never happened before and why should my phone be draining 60% battery whilst I’m asleep, not happy at all with this, it needs sorting. I see a lot of people are having this issue, such a shame.

I had 100% when I went to bed. Only app open was clock. Background updates off. Airplane mode OFF because if “it’s a phone” I should be able to get calls. About 8 hours later at 67%. Two hours later I’m at 46% with no usage except opening email and posting this. 14.4 no joy

You might want to refresh your knowledge about charging lithium batteries. Our batteries are the most happy between roughly 30 and 80 %. With the lower 30% zone, the zone were you want to avoid the most being in if you can. Letting it discharge below 5% is not doing any good, not extending its capacity and actually proven to accelerate wear on batteries.

I am spending a lot of time at home these days and I can be a bit of a battery freak....I even have an app that notifies me when my cellphone is charging through 80%, that’s when I unplug my phone.

I also use a 5 watt Apple charger to reduce heat when charging.

When the lockdowns are done, I’ll most likely be a little less careful, but will try to follow these good guidelines to preserve my battery.

Wow, thats great! What is Normal use from your side? Can you please share a screenshot from Screen On for the weekend in order to get better overview (as normal could be 2,3,5 and even >6 hours per day for someone.

I get about 1,5 days with 12 pro max from 98% to 23-4%., avg 4h SOT per day. Today I tested my old 8+ fully charged to 100% at 09;35am and now 14;15 is at 90% with 2 hours screen on, which is a lot of usage for that period of time and the battery is really impressive. (however, i should mention that the battery has been replaced in 2020 (August).

but its a pity that my brand new 12pro max is exactly the same in terms of battery performance as the 8+. Maybe the bigger screen, oled display and new software drain much more even though it should be optimized to the max. Also the 8+ on idle does not drain a s**t. Nothing, nada, 0% for 15+hrs.

i usually turn off WIFI, mobile data and Bluetooth over night, but with WIFI left on battery still dropped 3% overnight which is acceptable .

i usually only enable mobile data if away from home and not somewhere with free WIFI.

I probably am a light user, i dont use phone for watching videos or similar

apple support lady has got back to me and i have said she can close the case

i asked for any information about what was fixed in IOS 14.4

i just expected the battery to be as good as my old iphone 6

It is definitely associated with the IOS 14.3 and 14. 4 updates. Immediately after I completed the update, all the issues started. Never had any problems prior to the update. I'm lucky now to get 2-3 hours out of a full charge and that's even when not using any app's or the phone and all background apps are closed.

Consider yourself lucky. I had to switch my mobile carrier to get rid of battery drain. Even with 14.4, I still experience battery drain depending on the carrier. And the carrier which I experience battery drain with has better signal strength than the one where my battery doesn’t drain.

I had the iPhone XR and battery last the whole day, even with a lot of emails, phone calls, social media, messages... however my new iPhone 12 Pro battery doesn’t last even half of the day. I fully charged every night, but at 2 pm is at the 25%. I have to charge it again. I’m really not happy with that and also some problems with the speaker, when I use it during phone calls sometimes people don’t hear me. I already sold my old phone otherwise I will get back to it.