iPhone 12 battery draining fast

Ok 👍, it’s an another lead for Dev team Apple, I hope... I do not pretend to want or be able to fix this problem, it is just a personal observation that has allowed me, pending a future update, to limit the damage ...

Replacement iPhone 12 Pro Max

Night 7 Belt & braces approach. Backed up to iCloud and my MBP, updated to iOS 14.3 today, no carrier update.. Leave it manually selected on 4G, didn’t perform very well last night, draining 17% with 14.2.1 O2 setting 45.0

16-12-20 22:18 battery 93% left on 

17-12-20 09:00 battery 72%

iOS 14.3 no better for me 21% drain. Will manually select 3G and see how that goes tonight.

Night 8 Only change to leave manually selected on 3G

17-12-20 22:20 battery 90% left on & left alone.

18-12-20 09:08 battery 89%

That is what should be normal. Will have to leave manually selected on 3G till Apple get their act together and release a proper fix. Had so much stress because of this phone! They always seem to have problems because of the battery.

After updating to 14.3, I observed that the battery drain was still there and so I reset network settings. That's all. As to my brother, all he did was a reboot. Since then we've been experiencing fantastic battery. Also I set my network to LTE instead of 5G auto.

I honestly think it is another problem than the one talked about here, you should really return it asap to get a new one.

If it is still possible for you, you should even return it, ask for refund and buy a brand new one. Thus, you will avoid to have a "service device" which could be a refurbished one.

Hi,

I had the same issues as you with my iPhone 12 Pro. Battery went from 100% to 70% overnight (7hrs). Thats why I asked Apple for a new phone. No problem whatsoever, they sent me a new phone immediately. At first I was happy that everything went well, but eventually the new phone had the same issue... battery drain overnight, too much of a problem for a 1200€ phone. That’s why i asked for a refund and see if they’re going to fix it in the near future and maybe buy it later

I was having the same issue - my battery was dead before noon several days ago and I assumed that I had failed to connect it fully to the cable when I went to bed. However, I subsequently noticed it draining completely within five hours despite minimal use. Upon installation of iOS 14.3, the problem resolved. I will watch it closely.

Same here. Battery is draining too fast. When apple will take an action about it?

few minutes here I’ve read a lot of comments facing the same issue.... and it is not isolated case. iPhone SE 20 also occurs the same

i upgraded from iPhone 11 to 12 and was shocked about battery life one night left 63% and when woke up phone was dead. i recalled what happened to my iPhone 8 when left with pay as go sim ,

Try to disable news and Live stock app in notification panel and make sure you iMessages have been activated on your number and not stuck at activation . it helps now my phone have longer battery life but not as good as iPhone 11 .

So, i have updated to 14.4 beta 1 and can say that drain is over! Phone consumes about 0.5-1% per hour via wifi+cellular with huge sync/push activity! Russia, Megafon, Moscow.

14.3 have drain, 14.4 beta1 - doesn't.

I made a backup to 14.3 via mac and waiting for regular update.

Hi all

I have the same issue

iPhone 12 pro max with dual sim

no abnormal drain if 4g is on physical sim ==> 1% every 2 to 3hr at idle: ORANGE operator

abnormal drain if 4g on e-sim ==> 3% every hour at idle: SFR operator

I am quite sure that this did not occur when I had physical sim on SFR too (before my company change into ORANGE)

I have 14.2.1 s/w: I understand that even 14.4 is not fixing this, is it?

I am very disappointed!!!

QUESTION please: is the issue occurring only to people having activated dual sim &/or to ones having e-sim only? May you please advice?

Thanks

Emanuele

I have this drain-on-idle issue on physical SIM (no eSIM or dual). As I understand, the issue affects only iPhone 12 (including pro and max) models, it has been present in all iOS 14.0-14.3 and some people reported 14.4 beta 1 has it fixed, but I personally haven’t tried it. I can confirm that switching “voice & data” from LTE to 3G slows the drain to an acceptable level.

Thanks for the reply: I personally bought this iphone because of 5g capability and it is a shame to be obliged to set 3g on. I really hope that 14.4 will fix it even though I have a likely valuable workaround of using the physical esim 4g with a very good drain at IDLE (3-4% in 8hr). I have never seen this on my iphone XS max but it is true that I had the same operator on the dual sim configuration.

Further feedbacks on 14.4 beta 1 behaviour would be very appreciated

Thanks all and have good and safe XMAS and end of year holidays

Rgds

That really doesn't look fixed at all - that's the same sort of drain that most of us have been complaining about! Even in low-power mode overnight, you've still lost a good 10-15% of battery life. So that still looks broken to me - if that's "fixed" for you, then I dread to think what your drain was like before...

i am so disappointed....is it possible that there are some faulty units around?......I have though a 12 pro max and is it possible that we do not have all the same modem h/w? and that people not having the issue have a different modem h/w than us?

thanks a lot

OOOH there is hope here guys! In absolute desperation I updated to the VERY LATEST iOS version (newer than 14.3 - have to word it like this so the post doesn't get deleted!) and my 12 Pro Max only lost 3% battery in an 8 hour period overnight (98% down to 95%!)...instead of the usual 15% it would lose in the same time period! I did notice that this update included a new modem firmware so fingers crossed this wasn't just a fluke...I'll monitor it for another day and report back! But I have hope now for the first time since I bought this phone! For the record I'm running a Vodafone UK single physical SIM (not an eSim) and I have been experiencing severe battery drain on ALL OS VERSIONS (including 14.3). This is the first time since I've had the phone that it lost LESS THAN 5% battery in an 8 hour period. I'll keep you guys posted!!!

FOR THE RECORD...I didn't turn on any low power mode rubbish, I didn't turn on Airplane mode either, the phone was on 4G (which is the fastest I can currently get in my area) and WiFi. Background app refresh wasn't disabled...so the phone was, for all intents and purposes, operating as you'd expect it to with no compromises!