iPhone 12 battery draining fast

i did 2 things one night about 3 nights back.

1. I told Siri to tell Apple techs they better fix this expletive battery issue on this expletive phone with a software fix and she said she didn’t know how to respond to that but trust they listen.
2. I told Siri I guess it’s back to iphone 4 having to keep it on the charger all night I guess the retro case is matched with the retro battery! So I left it on the charger all night like 8-9hrs already at 100%.

And now it’s running as good as if not better than my iphone 11promax!

min totally serious about this. I’ve had an iphone since the original and everyone sense. I’m not sure if Apple snuck in a software fix overnight ir maybe the **** battery needed to be stretched to work with software. Whatever I don’t care it’s fixed!!

as far as I know no solution yet whatever help is offered disabling services, reset network settings and device. Hard reset and reinstall everything does not fix this issue. Apple it’s time to acknowledge this issue and apply an iOS fix ASAP if all possible due to nee hardware, modem, in regards to all previous models.

This battery life (12 Pro Max) is absolutely disgusting. Last charged to 100% 24 hours ago (09:06 yesterday...it’s now 09:04 today). Total of just under 2 hours screen on time in last 24 hours. Battery is down to 58%. On the PRO MAX! The old 11 Pro Max, which is advertised as having the same battery life as the 12 Pro Max, would have over 80% left with the same usage! Needless to say...it’s setup exactly the same as the 11 Pro Max! And on WiFi with 4G (not even 5G). Vodafone UK Single physical SIM.

To be fair, the iPhone 13 is unlikely to have this problem, as by then the 5G modem will be out of its first generation, and they'll have fixed all the problems they found with this one!

Before this phone was released, various online pundits were suggesting that the 12 was just a stop-gap phone until the 5G tech was more mature - looks like they were right...

Qualcomm must have carried out extensive testing on the modem chips to get carrier approval to use them on the networks, and that ought to have found any hardware problems causing power drain, so it is (in theory) how the chip is being used rather than the chip itself. So I'm hoping that Apple can find a software fix and I can then go and buy another 12 mini, but if not, looks like my 2016 iPhone SE will need to last another year until the 13 is out with the next generation of the modem chipset...

Last night was the first time this happened to me on the 12 Pro Max. Usually overnight (not charging) I would lose 3-4%. Last night I lost over 30%. Interestingly I had turned off 5G Auto yesterday and switched to LTE only. That wouldn't make sense in theory since 5G consumes more battery, but I turned 5G Auto back on today.

The battery drains crazy at idle and I think it’s because of the antenna hardware. It seems that Apple is not aware of this issue as I have tried contacting support. The new antenna would be my guess as to the culprit and it’s causing issues with cellular activity too. This is sadly the most disappointing iphone I have had among the many I have owned. Document all your issues as I suspect this will not be the last we will hear of the iPhone 12 pro max blunder described in this thread. An iOS update does not seem possible to fix/improve hardware strain which is what gives me less hope that this will be resolved without Apple or arbitration intervention.

I still can't understand the logic of the drain ? I thought I tried all the options to test the device in the last month ... the only thing I had to do was stay in 3G networks. Yesterday, I chose another carrier instead of my base carrier and installed its e-sim ...and

I give up. I can confirm the drain IS STILL THERE on the upcoming iOS 14.3! If apple don’t acknowledge this issue and fix it within the next week I’m returning mine and cancelling my contract. I’ve tried everything imaginable to stop this drain (besides changing carriers which I cannot do...but I’ve not had this issue on any other device). Nothing works!!

I was observing it overnight and it seems to drain a small percentage between midnight and like idk 3am to 4am ish? Between 3am to 4am ish and 8am it drains AN ABSOLUTE F TONNE.

Battery settings shows as 0m screen on and 0m screen off (not even Siri is running).

I’m on the pro max and lose 15% or more overnight (a quarter to a third of that seems to be in the first half of the night, while 3/4 to 2/3 of that seem to be in the second half of the night). It’s a pattern I’ve noticed for weeks! Meanwhile 11 Pro Max loses just 2-3%!

The phone claims it’s doing nothing...it’s obviously doing something! I lose less battery playing FarmVille (a game) on my 11 Pro Max than the 12 Pro Max loses doing absolutely NOTHING! This phone is broken.

Oliver S. wrote:

my Telekom eSIM (contract with 5G) is working fine. My Vodafone sim and my new WindTre sim don’t include 5G. The latter does domestic but not while in roaming where I’m in currently. Both show the abnormal battery drain.

I know I’m shooting in the dark...just trying to make some sense of this odd situation.

I only use one sim, at first nano, now esim from Telekom, both with 5G. In both cases high battery drain, so in my case it is not depending on lack of 5G.

After upgrade to iOS 14 my battery suddenly started tanking losing 30% charge per hour... or at least apparently so. I just played games on my phone for nearly 4 hours on a battery charge that the phone told me was at 1%. After 4 hours heavy use it is still saying 1%. I think it's the battery app that's been broken not the other stuff.

I think the problem is how new iPhones treat bad LTE reception. I bet no one here has a "good" reception with RSRP < 95dBm. iPhone just cant handle that and drains the **** of of the battery. It is not that iPhone has bad reception, it just can't handle having it. + it is somehow not a problem in US.

I agree with that. In the place where the phone spent the night today, 2 LTE divisions. I conducted an experiment, put the phone at night literally 4 meters in another place in the apartment and the discharge was only 4% per night

I have the same problem with iPhone 12 Pro Max.

Supernaturally strong discharge of the battery regardless of usage. All cloud and location services are disabled.

Even in pure standby mode without any activity the battery discharges over 20% in 6 hours.

Turning off 5G does not help either.

I have already replaced the device and the effect is even a bit stronger with the replaced device.

The Apple support hotline told me that the problem is NOT known.

I should call again in two weeks and ask if the problem is known and will be tackled.

There is definitely a serious technical problem that needs to be fixed.

It's almost unbelievable that Apple is not aware of it.

In various forums the problem is now mentioned by many users.

In the Deutsche Telekom Shop they also told me that I am not the first one with this problem.

It is a condition that is absolutely unacceptable.

If it is not repaired soon, I will return the device.

What else can we do to make Apple react as soon as possible?

Hi there struggling with the same issue as you guys (iPhone 12 mini).

Just talked to Apple Support trying to spread the news, but the lady just said that my Phone is fine and that she can't do anything about the problem. I told her I knew she wouldn't be able to fix it and asked her to please forward the news about this issue to senior staff so that apple becomes aware of the issue. She just said that she has no way to do that and that I should just use the feedback form instead.

Very disappointed by Apple right now.

Yes, we shouldn't disable stuff in order to make our devices work as they are supposed to, but if we find out that the widgets are the culprit, that would mean the issue is purely on software side and that it would be fixed easily