iPhone 12 battery draining fast

Just installed it on my 12 mini.

At least 14.4 brought a new modem firmware version.

I am experiencing the drain with Telekom Germany since iOS14.3.

With Vodafone and iOS14.2.1 I had perfect battery life for the mini.

Both are physical SIM.

Fingers crossed.

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.

This is just weird... It started out yesterday when I was in a very poor signal room. I stayed there 5 hours and never opened my phone. It lost 50%. I was a little bit worried and when I got home I charged it up to 94%. Lost 30% while using it for 5 hours then I wanted to check how the battery behaved overnight.

I was shocked to find out that I lost 40% overnight. It was all good until I went in that room.

Same thing happening to my 12 Pro, battery draining rapidly, seems to be caused by the music app as background activity, even when I delete the music app ‘recently deleted app’ is at the top of my battery stats each hour.

+1

iphone 12 mini owner, affected by the seemingly random battery drain issue. Toggling airplane mode stops the drain but then it will reappear once charged again.

Spoken to Apple a few times about this, most recently they asked me to do a full reset... which I did, but the problem persists. I am on EE as is my work android phone which barely drops any battery when idle.

Not really sure on the next steps - maybe returning to or getting a replacement from Apple. Not really ideal given the premium on these products.

When i finally got through to senior support to log my battery issue, they had not heard of it before, but when logging it for engineering they saw others had reported it. I think out of the huge number of iphone 12 sold not many of us have this issue ( or some charge every night and dont realise) but still a real problem. I was sent a new phone which of course was the same. Apple support were not very good and did not solve it, but IOS update did, so i gave up with support. Apple still seem to be in denial about the problem though. It does seem to be carrier related.

Unlikely to be a faulty phone or battery

it s an issue which Apple are keeping quiet for some reason

try updating to newest IOS version, this fixes it for some

else complain like **** to apple and whoever you got the phone from

For me it got much worse. I downgraded to 14.4.1, which fixed the idle battery drain issue on the iPhone 12.

You can see my battery charts in this thread:

https://discussions.apple.com/thread/252603947

Rubbish, Apple ARE aware of this issue, just not discussing it publicly

go back and complain loudly.

i was sent a replacement phone which jad the same issue as it is NOT a battery or hardware problem but is due to excessive communication with mobile mast - normal phone data, nothing to do with mobile 3G/4G/5G data.

issue fixed for me with IOS update but still not fixed for all

Only way I can get my iPhone 12 pro to last more than a day is with all app refresh set to only when used and all background apps and locations turned off; basically run through your settings and turn everything off or only when in use then switch the phone to low power mode even though it’s 100% battery is the only way I get a decent day of battery life! Ps the phone automatically switches low power mode off when sufficiently charged so you have to switch low power mode back on! That’s really frustrating I’m new to iPhone and like the device so far but it’s not running at it’s best when I have to disable all apps refresh and run in low power mode to get a full day of moderate use! Otherwise it’s more like 3-5 hours of internet and the phone is dead. No streaming, no talking, just a few texts in between and very few videos if any at all, mostly just research and reading. What a disappointment, are there any new phones worth the money anymore? Because so far not even Samsung was holding up to a phone 3 years older from an s9 to a note 20 ultra!

Battery drain issue is ( for most it seems) due to something connected to phone signal as IOS updates fix it. So not a hardware fault.

if yours is getting very hot that sounds like a real battery problem, i would take it back and insist on a replacement

Where you able to contact apple or had a replacement for the battery drain issue? Tried to restore, reset network setting and still not luck. The only thing that fixed my battery drain issue is when I removed the sim card.

Hi. In Safari go History - Clear History.

The box says "Clearing History will remove related cookies and other website data. History will also be removed on other devices signed in to your iCloud account." You probably need to be signed in to your iCloud account on your phone. I am not at all technical and hardly know how to use my phone, but my battery just started working normally again. It may have been a coincidence that I cleared the history on my Mac (I normally do it every day, but had left it for a couple of days). But I can't think of any other reason why it would have started working normally again. I found that the battery just levelled off and stopped draining. I recharged it yesterday evening and still have 85% after 1.5 days.

Until then (hopefully), if you're home and your contract supports Wi-Fi calling, enable that in the cellular settings (if its isn't enabled already) and put your iPhone into airplane mode. Make sure to re-enable Wi-Fi if it turns off the first time you enable airplane mode. This at least stops the drain while you're home or connected to Wi-Fi wherever

I am not defending the obvious issues the 12 series has, but I feel the need to clarify what the percentages here mean.

Its does NOT mean that the Home/Lockscreen is using 52% of your entire battery. Its means that, lets say you used 10% in total in that 1 hour you selected in the graph view (11-12 o'clock) the home and Lock Screen would have used 5% (52%=half) of that entire amount. The screen was lit up 50 minutes in that time frame and was active for pretty much an hour straight. That could be anything from you swiping through your home pages, to the phone simply receiving notifications that light up the screen and display the lockscreen or you being on a phone call on speaker and the display was on the entire time (and maybe displaying the Home Screen.

Example:

If you would leave your phone with the display on for an hour in the settings app (without doing anything), the battery could drain 5% in that time just by having the display on. The settings app would then show 100%. Because the settings app was responsible for the entire consumption of these 5% in that period, hence 100%.