iPhone 12 battery draining fast

Sartheris wrote:

I think some people in this thread have very wrong understandings of what a battery drain is supposed to be...

First of all, don't brag when your phone is staying at 100% for a long time, since the iPhones INTENTIONALLY don't show accurately when the phone has been plugged off the charger, in order to give you more confidence.

It would not look good in the eyes of the user, if the phone's battery indicator dropped 1% exactly when you take it off the charger, right?

Second, some people here seem to think that ANY battery drop is bad and not the way it's supposed to be, like, they talk on the phone for an hour or use social medias extensively, and get mad when the battery drops...

P.S. Please, when you post those huge screenshots, MENTION YOUR MODEL, otherwise you are not helpful.

Of course, it is normal that the battery looses energy when you use the phone, but most of the people here (so do I) compare the behavior of their previous iPhone's battery to the new one and see a clear difference with their own use.

So yes, it is normal to loose battery but the iPhone 12 does it quicker ... and even much quicker.

Keeping my iPhone 12 Pro Max....just purchased the Apple Care Plus to cover it as well.....though it does annoy me Apple don’t acknowledge the battery problem. Wouldn’t buy an Apple EV car that lost 20% of its charge overnight whilst parked on the drive through. Imagine loosing a full tank of fuel every 5 days ....not a good selling point.

No, I'm afraid you can't conclude that. Modems do have firmware, but they also have hardware blocks which are not necessarily under control of the firmware, such as the radio frequency front-end. The fact that there is no drain in 3G doesn't mean there is no hardware flaw in the RF section for 4G and 5G. So there's no guarantee that this problem is fixable in firmware; the 4G and 5G hardware may have a fundamental flaw.

Actually it is hard to say about this. Indeed I use the same operator on both SIM and I have always used the data of my personal contract (eSIM).

The phone is currently in charge, I will continue to use the eSIM data tonight and tomorrow. Then for tomorrow night and the day after I will switch the data to the physical SIM in order to see if there is any difference.

The day after, I will switch to the 12 again.

Here is today’s values

Here is a similar day at office with the 12 Pro Max on iOS 14.2.1 for comparison. Actually the use was even a little lighter.

Tonight I went from 46% to 38% with an iPhone 11 Pro Max, between 11h45pm and 7:30am!

Are they making the old ones draining to hide the drain on the 12?

And here is the 12 Pro Max idle since Sunday without SIM but still configured and with the same background activity theoretically. Its last charge is from Sunday late evening.

Yes, I am also facing this issue. It happened to me twice so far within the first 2 weeks of using iphone 12.

First - 10% reduction overnight

Second - 12% reduction overnight

When I was sleeping, my phone state was in:

1. Low power mode - ON
2. Wifi and cellular data - OFF
3. Always listen to "Hey Siri" - OFF
4. Background apps refresh - Set to OFF for 90% of my apps
5. Zero apps running in the background

Yesterday morning at 10.00I took my iPhone 12 from the charger at 100%. Just checked my e-mail twice, the rest of the day It was in my pocket unused. I forgot to take it out and charge, and this morning it was at 12%!!

completely drained without using in one night!

all background tasks off, no Hey Siri (no Siri at all by the way) and no fetch, no raise to wake.

Apple should recall this iPhones NOW imo...

This is mine, again, iPhone 12, this is at night being idle. From 73 to 3% just idle during sleep. Background task off, Siri off, Raise to wake off, set to use 4G and not 5G

This is not normal for e brand new phone..... :-(

Leaving your attitude for what it is, firmware 1.41.00 does not solve this, so if they have a later version there, I would like to know.

And of course Airplane mode is off, otherwise I could not use my phone for 4G, a phone is used to, well phonecalls, so turning that of is nuts in day to day use.

I guess you will be in for a big disappointment coming weeks when you will notice it wasn’t solved for you as well.

As you said: just wait. Just wait and your phone will drain again just like all ours here...

I am less and less sur that it can be fix by software update, I mean for those of us who don't have amazing slope as we can see above.

Apple has reduced the capacity of their batteries, relying on the 5nm engraved CPU but seems to have completely forget piece of sh*t of modem... So with a smaller battery, it cannot make miracles.

On my side, endurance for endurance is not the biggest deal. Indeed, I was used to plug it every night before this, and it was the case with my 11 Pro Max. I have stopped only to investigate this situation.

But the biggest deal for me is to pay 1400€ for a phone which will not last an entire day with a heavy use like in holidays. I mean when you take pictures, videos, make phone calls, use apps, fly a drone and use the GPS ... all this without plugging it to the wall or to a car.

I was able to do this without any doubt with my 11 Pro Max and I had never ended a day like describe before with less than 20%. But I am really not sure that the 12 Pro Max is able to do the same :( And of course, I don't want to have to switch off the 3/4 of the phone's features to do it!

I'm not sure if you are completely right about the modem. Despite me having 10-12 percent overnight drain (managed to get 6 percent right now) my colleague has the same 12 Pro with DEFAULT settings, and his drain is only 0-1 percent over night. He is using LTE and not 5G.

Your colleague falls in that lucky percentage to have a working iPhone 12 pro. This entire thread, parts of Reddit, and alot of other places, are filled with the standby drain issue. So he should count his lucky stars.

Yeah, I guess. I asked one more colleague, which has 11 Pro and his drain is also 0 percent over night with default settings. Also I made a poll in FB (in my country) about 12 Pro drain over night and most answers were not over 4 percent:/ I don't know what to think, but strongly hope that its software problem and not hardware.

I am using LTE too, as I am with dual SIM ... What a joke also! And I prefer to not imagine how it would be with 5G!

Are you using the same carrier as your friend? Because, yes 0-1% over night is how this type of phone should behave.

Yes, I am always connected to wi-fi. I also thought it might be with the different routers, so I disabled 5GHz at home since her router does not have that, but it did not help. But what actually helped was disabling wifi connection at home, so only using LTE. But those may come from background refresh only being enabled on wifi, but I don‘t think it affects the drain that much in comparison.