iPhone 12 battery draining fast

Yes, I'm using the same carrier on one card. But our situation is slightly different - he lives in the center of the city with mobile towers all around him:) And I live near the center with slightly worse signal strenght (four bards). Also I have dual sim configuration in my phone, he has only one physical sim. But what drives me mad that he is able to reach such usage with delault settings and I was able to reach 5% usage at max while dancing with the drums (by turning off various iphone services) :)

I have made the same experience. When I am closer to the center of the city (+ having wifi) the drain is gone, but being closer to the border „activates“ the drain. But signal strength is good at every place.

I also compared that in details with iPhone‘s Field Test Mode using/calling *3001#12345#*, but everything is identical except some cell ids.

Aladdin-lt wrote:

But what drives me mad that he is able to reach such usage with delault settings and I was able to reach 5% usage at max while dancing with the drums (by turning off various iphone services) :)

I understand you so much ... Just like you were using a Chinese Android phone sold for 1€ with your carrier contract :'(

Keithfrs wrote:

Usage is ok for me. I’m not losing 1% a min, down about 6% after 1hr on screen. It’s not ideal but I think for now this will have to do until apple patches it up in the next update.

6% for 1h of screen is actually good, on the last 48h with an average of 2,5h of screen per 24h, I don't have a heavy use at office, I run out of battery in 50h...

So even if I consider 20% on idle consumption by day which is huge and not normal at all, it remains 30% ... Which means more than 12% per hour of use! When Apple advertises 20h of video streaming ...

roT- wrote:

I also can confirm that this works! Lost 3% of battery this night! Thanks

So this manip reset something in the phone and bring him back to something close to a normal consumption over night.

HalphPint wrote:

What exactly did you do?

I 've done nothing on my side, but I referred to those who have done a hard reset.

After all, an iPhone is a computer so when it bugs you just have to restart it ... until the next one!

It is a temporary fix, maybe when you are back in a well covered area from an area with less coverage. I make assumption ;)

Yep, pretty much that's what I tested. Anyway, my return period is in 3 days. So I'm sending mine back and keeping updated with this forum then I'll repurchase one once reviews says it's fixed. This device costs way too much to have such a silly issue that takes so long to rectify from a massive company like this.

Sonic_69 wrote:

Yep, pretty much that's what I tested. Anyway, my return period is in 3 days. So I'm sending mine back and keeping updated with this forum then I'll repurchase one once reviews says it's fixed. This device costs way too much to have such a silly issue that takes so long to rectify from a massive company like this.

You are wise, and I will probably do the same ... At least to get a new one and get an extra decision time of 14 days.

Just in case iOS 14.4 finally fixes it.

Salut Selzere

in reply to one of your previous posts, i agree with you that the battery consumption with normal usage is quite disappointing beyond any test of idle drain. Almost Every time i start a call or reply to one (after a standby period) it loses 1%. On the other hand, with respect to your assessments of the past did you note an improvement after doing the hard reset, if you have done this latter?

thanks and ciao

I don't know if my iphone has a serious battery problem. Since purchase I am using it very little, because i’m using old 6S for Safari, Youtube and the other heavy apps. By doing several tests I reached about 90 hours in stand by, leaving it totally unused. I noticed that the average consumption in stand by (wifi ON) is about 0.8-1% every hour, while the night consumption goes from 2-3% in airplane mode to 5-7% with wifi ON 4g ON and low power mode OFF . My fear is that the consumption during use is excessive ... the graphs I posted show a consumption of 20-25% with 30min of screen on, in proportion only 2-2.5 hours of SOT with a full charge! It seems to me a very poor potential result!

I would say that for a mini it is not so bad, maybe with all this we have too big expectations.

I mean that maybe 6 months ago, we would have considered your graph as perfectly normal for a device with a smaller battery like the mini ;)

Try to not activate the airplane mode for one night, and see how it behaves. Of course the number of minutes of use can give a trend, but as the use can vary a lot during those minutes it is not always comparable.

Whereas in idle overnight, it is really more easy to make a reliable comparison.

Was losing about 17% or more overnight (7/8 hours) in standby on iphone 12 mini on O2 in the UK. Disabled icloud back up and had noticeably less standby drain during the day and only 10% over night which was actually nearly 10 hours in standby on this occasion. Only been 24 hours and maybe just a coincidence and back to normal tonight but that was my only change after speaking to apple yesterday.

So a summary of what’s happening here is that people on O2 network are facing the issue. I have switched network from giffgaff (O2) to virgin (EE) and the battery drain is gone. While I was on giffgaff (O2) I tried installing the latest version of iOS 14 which isn’t out yet and the drain was gone. Make of it what you like, but I can also tell you in mobile data settings, while giffgaff has 5G as an option, virgin doesn’t.

Had an interesting talk with Apple support tonight.

Support agent suggested that my battery issue might be due to phone copying all setup from iPhone 6 which is quite old. Has suggested that I backup phone ( PC or iCloud) then do a full factory reset, and NOT restore phone, and see if battery problem goes away. Then reload apps slowly and see if any one of them causes the issue.

Have not tried this yet, but sounds plausible.

interesting to know if others with issues transferred phone setups from a previous phone ( and which model) or if setup phone just as new.

Hi, have battery issue on two new iPhone 12 Pro, bought just before Christmas. Both on O2 network sim.

have others confirmed that it is related to O2?

have you proven that the next version from IOS 14.3 fixes it ?

we get about 20% battery drain overnight even with WiFi, mobile data and Bluetooth all off.

if flight mode selected, battery drain is about 1%