iPhone 12 battery draining fast

I read maybe 50+ comments about battery on 14.3, in this forum YouTube and others forum.

40% says “battery ok”, 40% “battery worst than before”, 20% “no difference”.

It’s hard to decide if upgrade or not because I lose 1% for hour and I fear it could be worst!

here what i had done for my IPHONE

Turn Off Background App Refresh

However, allowing all your open apps to continually update and refresh in the background is a sure-fire way to drain your iPhone 12 Pro battery. To turn off Background App Refresh: ... Tap Background App Refresh. Hit Background App Refresh again, then select Off.

[Link Edited by Moderator]

I have background app refresh turned off.

there is an issue with built in apps (messages, phone, photos) either super draining or ignoring it.

ALSO - as reported with 14.2, optimized battery charging kept turning back on.

in 14.3, my wireless charger indicates (via unique color) that my phone is no longer charging in the middle of the night, even though I have optimized turned off.

... which may be inaccurate, since is the exact behavior if it is turned on.

... and explains a 30-35% drop in battery.

Still experiencing the same drain after updating to 14.3.

iPhone 12 mini

carrier: o2 germany

Are there other people with o2 for whom the problem persists?

Or could the ones (in Germany) that saw improvement after updating to 14.3 specify their carrier?

iPhone 12, 256GB

I have updated to iOS 14.3 yesterday at noon and I immediately switched to DSDS mode to test it out, it has been short of a day until now and it seems to me that the abnormally fast battery drain I experienced on DSDS mode has been greatly reduced (fingers crossed). Last night my phone lost 5 percent during the span of 7.5 idle hours. I used to lose 20-30 percent during the same period of time on idle. Frankly speaking, I still think the battery drain is a bit higher than it should be. I’ll give it a few more days to conduct more tests.

Ok so it's been more than 24 hours since I updated to 14.3 and I observed that the first 20-24 hours from full charge, the battery standby is great but once it starts to drain or once I started using the phone, the fast battery drain came back. So apparently, it hasn't been fixed.

Hi, i am not facing any overnight battery drain, but yes loose a good amount of battery with light usage. Are you facing an issue with high battery drain only on standby or even while using it. I am just asking for the sole purpose of whether should I update to 14.3 or does it make the phone even worse.

I just updated my software to 14.3 last night and so far my usual 15-20% battery drain is now only 6%...my 12pro max is already ready for refund but i Would still monitor for the following days. I'm still hoping Apple would fix this issue as soon as possible coz i still find 11pro max much better

Exactly, old iphones never lost battery battery like what the 12 series is. I’m lucky that I’m not losing much battery on standby but like its just more than normal with usage. Battery drain is pretty inconsistent is what i have to say. I play a game for 10-15 minutes and lose no battery but just a couple of minutes of browsing losing like 2%. I’m pretty sure this is not normal. I really hope that apple has some fix for this problem soon. Even ios 14.3 hasn’t fixed this problem

I see, thanks. I’ve updated to 14.3. Let’s see if it solves the battery problem.

However many people are still complaining about the problem after updating 14.3. So is that carrier specific or country specific ?

I experience the same thing but I think to know why.

This can probably be explained by the fact that as they are new or almost new, the battery capacity is often higher than the design capacity and therefore, the max battery capacity is higher than 100%. There should be a software limitation to not display at state of charge higher than 100%..

For exemple, according to coconut battery, mine has 200 mAh (approx 5% on a 12 pro max) more that the design capacity, so fully loaded it is virtually at 105% even if iOS shows only 100%.

The drain from 105 to 100 is invisible, but exists, and then from 99% the drain start to be visible.

THIRD replacement iPhone 12 Pro Max. On 14.2.1 it drained roughly 15% overnight. Held out for the release of 14.3 in case it solved the problem so eagerly updated when it was released....unfortunately issue remains. Last night went to bed at 01:00 with 72% battery, woke up this morning with 59% battery! I am now returning my phone for the last time and cancelling my contract. Well done apple, you’ve lost a customer. And more will follow if you don’t hurry up and fix this issue! Vodafone UK network. Single physical SIM. Not even in a 5G area. Old 11 Pro Max loses only 2-3%!!! So it’s not the network!!!

Of course it is not the network, it is the device or its software/firmware ...

Almost everyone here has seen a difference between its previous iPhone and its 12, most of us have restored a backup so settings are the same and network is the same as people haven't changed their home place ...

The only difference in the equation is the device itself, so if the result is different ... it is due to the device and not to customer use or settings.

Hi,

did you notice upside on the right corner where is the indicator for network connectivity it's shows you that you have only two from four!

I've noticed that yesterday, i'm iphone 12 mini owner and almost always im not having full carrier connection !? It may comes from that reason to loose battery without using the phone at all..

I'm not sure, but if anyone can share with us if there is similar problem like us.

Can confirm that 2 bars makes no difference. Why? 2 bars on my 11 Pro Max...no drain. 2 bars on my 12 Pro Max...insane 15% per night drain (and constant drain during the day as well). The network isn't the issue here, it's the phone!