iPhone 12 battery draining fast

Selzere wrote:

Theoretically, I agree with you. But it is when he is roaming away from his home that the drain stops ;)

Apple is doing magic, it drains at home then it stops when it starts for the other manufacturer ...

Or maybe some magic like at home the phone is idle and can see WiFi and a charger, so it does an iCloud backup, but when roaming it has no WiFi so no backup. There are probably many other possible reasons which need to be ruled out by logic, leaving only a short list of suspects.

Branta_uk wrote:

When we see consistent reports from vanilla out-of-box devices I will be more convinced this could be a hardware problem. Until that stage my prime suspect is still around third party software and unexpected network activity.

If you look back in the early pages of this thread, you will see several reports of people who saw the problem on an out-of-the-box device with no third-party software installed. I tried that myself, and still saw the power drain. This is a fundamental problem with the modem hardware; it's got nothing to do with third-party software, as it still happens on devices without any installed.

My 12pro max , did a comparison.

A day ago, put into flight mode overnight, battery dropped about 2-3% which seems OK.

Last night flight mode OFF, but also turned OFF wifi, Bluetooth and mobile data, yet battery dropped about 20% overnight.

Does anyone know what what other functions flight mode turns off ??

ColinFromSussex wrote:

Does anyone know what what other functions flight mode turns off ??

Flight mode completely disables the modem. Turning off mobile data merely prevents the modem being used for data; it leaves the modem enabled for voice and network registration. The power drain is caused by the modem remaining in a high-power state when registered to a 4G/5G network.

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...

I switched from Samsung to apple. But it’s shocking to see my 12 pro losing battery very fast even for normal usage. Samsung atleast was good for 2 years for a lower cost. Now I started worrying whether I made a mistake

I see this battery drain

iPhone 12, Battery level varies between one and $.75, 6 am to 7 am, Battery level varied between 70% and 61%, a.m. to 9 am, battery level varied between 58% and 36%, 10 am to 11 am, battery level varies between 28% and 21%,, Battery level varied between 19% and zero persons, 12 pm to 1 pm, this is unacceptable, so those who are switching to iOS, get something black and 11, XR, eight, iOS 8 second generation, you’ll have less battery drain, I’m so disappointed in Apple

Thanks Simon, that explains something about the battery drain, now just need to find out why modem is using so much battery when phone is sitting idle, previous iPhone batteries did not drop like that overnight.

Last night I was pleasantly surprised to see my 12 Pro Max drain only from 63% to 60%. However, since this morning I have clocked only 1 hour 20 mins screen on time and the battery is down to 32%!!! It seems light usage sees the battery tick down like the small hand on a clock! It’s not just standby drain we need to worry about guys...it’s battery drain in general! This thing struggles to provide 6 hours SoT, factoring in idle drain as well. It IS better than it was before where it struggled to last 3 hours under the same conditions...but for the max model it’s nowhere near good enough, nowhere near!

Am running the very latest software with the 1.41.00 modem firmware update. Vodafone UK.

Yes. I’ve been on the latest software with the new modem firmware for over a week now and while I have seen an improvement in the idle drain (anywhere from 3% to 10% a night...usually 4-6% though last night was only 3%...compared to earlier software where it was 15-20% a night...by a “night” I mean a period of 7-8 hours). However, the drain while in use has not changed much at all. The only reason the phone is now struggling to last 6 hours of screen on time, factoring in idle time, instead of the previous 3 hours is because of the improvement in idle drain. But drain while in use is still a big problem. Using the camera (for photos, not videos), browsing Safari, or even just loading up the Mail app can see the phone lose a percentage every few minutes. Even just tapping the screen to wake it so I can see my notifications...a split second job...can see it lose an entire percent! Yesterday I lost 3% in 3 minutes doing exactly that! Waking the screen periodically over a period of 1 hour...clocking 3 minutes of screen on time...3 whole percent! Today...50 minutes in the camera app saw a drain of nearly a third of the entire battery! Even typing this message I’ve lost a whole percent and I’m a quick typer (2 mins SoT).

If light usage can cause such an extensive loss of battery I don’t even want to imagine what intensive usage, such as gaming or photo editing...which is what the iPhone is made to excel above all else in...anyway I don’t even want to imagine how much battery that uses!

maxwilkes92 wrote:

Yes. I’ve been on the latest software with the new modem firmware for over a week now

There is no such thing yet as a new modem software! You are confusing the updated services that some telephone carriers rolled out, that has nothing to do with the modem software in the iPhone 12. It does not solve any problems in the long term, just wait and see: your phone will drain again fast very soon...

i’m experiencing the same issue. honestly thinking there wouldn’t be much difference from 11 Pro but the draining battery when idle took me by surprised. on my previous 11 Pro i could be sleeping for 7 hours without any % lost. i went to bed at 100% and woke up still with 100% (what an amazing experience lol). now it’s only been 2 days since i switched to 12 Pro and i kind of regretting my decision.

Well it’s been 2 days. So I don’t know what you’re talking about. My phone’s battery is fine now. Last night I went to bed at 8:30 with 59% battery. Woke up 5:30 with 55%. The previous night I lost only 4% overnight.

Just wait for the VERY LATEST Update which is going to bring modem fw update. I have been using the very latest FW for 2 weeks and I usually lost only 2-3% per 8h of idle. In 14.3 a discharge rate was at about 12-25% per night and I changed nothing, absolutely!

just wait

Horizont32 wrote:

Just wait for the VERY LATEST Update which is going to bring modem fw update. I have been using the very latest FW for 2 weeks and I usually lost only 2-3% per 8h of idle. In 14.3 a discharge rate was at about 12-25% per night and I changed nothing, absolutely!

just wait

No, I have just that, software and modem update. The screenshot above is with that software and firmware!!! It solves NOTHING as you can see in my screenshot, so do not tell us things that are simply not true, thank you.