iPhone 12 battery draining fast

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???

When I reported my issue with battery drain in December, I asked Apple operator, if he is aware about this issue widely discussed on Apple Forum. I sent also link to this thread. He said yes, they are aware. But it was just 1 operator. Nobody knows if any escalation was done.

So if there is no reaction until today via SW update, problem can be more difficult and perhaps in hardware, as it was already mentioned.

Problem solved atm, after upgrading 14.4 yesterday (with 14.3 - 15% overnight, after 24h only 55% left, same DoT)

26.01. 11PM - 100%

27.01. 07AM - 97%

27.01. 06PM - 91%

1hr45 DisplayOn Time

iOS 14.4

iPhone 12 Pro

no Airplane Mode

Mobile Data : 5G Auto

Data Mode: Allow More Data on 5G

Bluetooth and WiFi activated.

Telekom Germany, Physical Sim

Regards

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

i don’t see posts after October but my 12 was fine until Nov/Dec and since then having all the issues described throughout the posts above. And I stopped trying 5G too. Don’t know if 14.4 has a fix in but we’ll see. If not I’m off to Apple store.

Just this past week my 11 pro max started acting like my 12 pro max did and drains balls now. Apple stop messing w stuff. Now I’m ****** I even sent back two 12 pro Max’s and bought another 11 max cuz it’s acting like crap now too after a good month of being a battery beast. This is getting old

Problem solved , after upgrading 14.4 yesterday

1:00 am - 96%

8:00 am - 96%

iOS 14.4

iPhone 12 Pro

no Airplane Mode

Mobile Data : 4G Auto

Data Mode: Allow More Data on 5G

Bluetooth and WIFI activated.

Sim active

Regards

Hedayat

iOS14.4 looks promising on my phone as well.

It‘s not perfect now but a big improvement.

27.01. 11PM - 50%

28.01. 07AM - 44%

iOS 14.4

iPhone 12 Mini

no Airplane Mode

Mobile Data : LTE

Bluetooth and WiFi activated.

Telekom Germany, Physical SIM

On iOS14.3 my phone drained 15-25% per night.

Upgraded yesterday, even thought with no hopes yet as nothing in the update notes addressed anything close to this issues.

Battery before bed was 36%, woke up with 33%. Will see how this goes by end of week....

Big improvement.

my original and replacement iPhone 12 Pro Max were loosing 20-30% overnight on iOS 14.2.1 & 14.3 no matter what I did. Eventually trying out things mentioned on this forum what worked for me was manually selecting 3G, then would have no battery loss overnight.

Upgraded to 14.4 yesterday. Overnight battery went from 91 to 88%. Which is more acceptable.

UK on O2 PAYG physical sim.

hardware model D54pAP

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"

I have a twelve pro . Just short of 6hrs SOT on LTE throughout with a bright screen. Unfortunately this is how just it is with this phone. Switching off LTE to WiFi gets better results. This is not software issue but a hardware modem issue. I am gonna get two of those snap on magnetic anker batteries when they come out.

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.

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.