iPhone 12 battery draining fast

I have spoken with Apple support 4 or 5 times about this. Their latest advice was to go to an Apple store (not something I am desperate to do to be honest). I did ask if they offered an option via the post but in his own words "I wouldn't trust our postal option - they might well just miss the issue".

Latest battery drain... charged to 100% at 1pm. Dropped 20% in a couple of hours despite my phone being in my pocket the whole time at home. Looked at the apps using the battery... "Phone audio" is the culprit apparently, not that I have made any calls since the day prior.

Happy days - now off to Apple store at the weekend, where I imagine I will be fobbed off in person, which will make a pleasant change from over the phone.

I think it is relatively considering the number of iphone12 they sell, but Apple seem to be keeping it quiet and not telling support staff about it as they should. Make sure he reports it back to apple engineering so they cannot deny knowing again. Insist on a response to you, the customer

If it is getting that hot, then that could be a true battery problem instead of the drain isdue others have seen

that is dangerous- go back to store and complain loudly.

updayed mine to IOS14.5 last night, overnight drain with wifi, Bluetooth mobile data all OFF was 3% which is OK

Hi Mr Colin, i want to understand what is the point of using thr phone if you’re going to have to keep all the features off on your phone. I keep my phone on wifi 24/7 and charge my phone just before sleeping so I don’t encounter any drain but if its not charged before sleeping i experience about 10% drain overnight. Please monitor the drain with wifi on throughout the night. And does mobile data consume more battery for you than expected? Thank you sir have a good day

I have the exact same issue. If I charge to 100% and leave it overnight, I wake up with 100%. If my battery was say at 60%, sometimes I wake to 58%, sometimes 50% with nothing happening in the background. I also notice it stays at 100% when in use for quite some time and then drops rapidly.

I have my phone set up to consume as little battery as possible but some days I will use 60% on less than 2 hours screen time, some days it seems to last much longer (although nowhere near as much as I think it should). I never use it to play games, watch Netflix or YouTube or anything that I would expect to use a lot of battery. Just Signal, Twitter and limited browsing on Safari for the most part.

There is something very wrong with a lot of iPhone 12 users battery life. Why can't Apple recognise this?

My six year old iPhone 6 (with its original battery) I paid £850 to replace might not have lasted me the full day but at least I knew where I stood with its battery life.

With WiFi, Bluetooth, Mobile data turned off and all other background refreshes toggled off, I’m seeing 4-5% drain over 8 hours of idle during the night on my iPhone 12. The battery charts have nothing listed during the idle time. However, I was surprised to see 0% battery drain when I took an hour long WhatsApp voice call on WiFi over my Bluetooth headset yesterday. Started at 80% and stayed there throughout the call.

The battery drain is nowhere near to what i saw on these discussion pages, I was just wondering if this is normal on iOS 14.5.1. It’s my first time using an iPhone, and I was under the impression that iPhones have stellar idle drain management dropping 1-2% overnight. Also, if someone can share the experience of having an eSIM configured as well. How much of a hit will the battery take overnight? Will the idle drain turn out to be 10%? I just multiplied the idle drain by 2 here.

Thank god you get 7.5 hours. I wasn’t getting 3 hrs SOT before 14.5. It is a miniscule battery and that XDR oled melts the battery on full brightness. Typically the samsung last generation get 7 hrs sot and have a battery almost double the size. So thats the competition basically

Me too experiencing same issue. Today i lost 30% battery overnight without any background operations. But one thing i noticed was , if you keep your mobile in aeroplane mode. Only 2% battery consumed. Please check my battery usage last night

Sounds pretty normal. According to what you say about 6-8% consumption of battery per hour is great. Which means you can get about 9-10 hour of screen on time in 2 days. I generally lose more battery with every hour increase in the usage so your battery is genuinely great. But yes in comparison in the 11 series the iphone 12 lineup’s battery isn’t as efficient as the 11 pro

So I too can vouch for the idle drain being 0% when unplugged at 100%. Additionally, it is the same at any other percentage as well. What I mean by this is, even if I unplug my iPhone 12 at around 80% irrespective of day or night, it stays at 80% even for as long as 5-6 hrs idling with 0% drain, sometimes even for a longer duration. This is with WiFi on, BAR turned off and dual SIM active. I have also seen this when I unplug my iPhone just before going to sleep (again at around 80%) and it doesn’t drain a single percent. But if I have let’s say used it for a while and it has drained a percent, it will see an idle drain of 4-5% with everything turned off except both my SIM cards being active. I’m wondering if this is not normal? I mean don’t iPhones drain even a single percent while idling during night? I’m confused here, coming from android I thought this is normal.

LTE causes a lot of drain in my case, about 20% with one hour of usage. I would definitely go ahead and try using another wifi. I would say that it could be a hardware issue because then whats the reason for the phone to heat up so bad so fast.

Thanks Lohvarn. I tried all that today with my iPhone XS: Turning off Bluetooth, then Find My Network, then Find My iPhone. No change. Look at this graph. The steep part today is during all these attempts. The kink towards the flat part at the end is when I switched to guest Wifi.

Switching to guest wifi is the only thing that consistently and 100% reliably fixes this. Each and every time, no exception.

I have a bunch of AirTags, but this problem is older than them. I don‘t have a Homepod. I have one Apple TV (also newer than this problem), and three Macs on my ID. There are more Apple devices running on other Apple IDs in the household, and a few dozen other devices in the network, like Linux servers, printers, Raspis, switches, access points and so on.

I already discovered constant traffic between the Macs and iPhone+iPad running on ports >50000 by sniffing the network. It‘s TLS encrypted, so I don‘t know what it is. Have a feedback ticket open with Apple with all the details including pcap files, but as usual it gets ignored.

When I'm away and on LTE, the curve is flat as well (depending on cell coverage/distance to nearest cell tower). So, no cell package that could be responsible. Also, nothing changed in my contract recently. And when I use flight mode and manually enable home Wifi, the battery consumption is the same as with LTE enabled. Wifi router is the same with either regular or guest Wifi.

Thanks a lot for submitting those reports to Apple. I’m not holding my breath that they’ll do anything, but we can always hope. Today’s macOS update fixed a few unrelated Wi-Fi issues based on early reports, but it didn’t seem to fix whatever’s causing the battery drain with Mac and iPhone/iPad on the same Wi-Fi.

For now, I’m getting pretty good results on the guest Wi-Fi with Bluetooth disabled, although disabling Bluetooth breaks a lot of functionality and is definitely not ideal. So I’m experimenting with various combinations, currently Bluetooth enabled and on guest Wi-Fi, but Find My Network disabled. I’ve just seen other reports that seem to corroborate my hypothesis that these Bluetooth issues started with the AirTag firmware update Apple pushed in late June. I hope disabling the Find My Network is enough; otherwise I may have to remove all my AirTags from my account and only reattach them before going on a trip.

The exact wording is “Show this iPhone/iPad when on Wi-Fi,” and it appears when you plug your iPhone into your Mac, then select your iPhone/iPad from the sidebar.

The problem is definitely difficult to diagnose on iPad due to the larger battery, so I tend to let it sit for a day to observe trends. But next time you leave for an extended period, take it with you and see if the slope of its battery graph changes at all. It becomes more obvious then.