iPhone 12 battery draining fast

Absolutely brother, it gives me 6hr on the average of 1% per 4min

4min x 100battery-life ÷ 60 = 6.6hr Screen on Time.

No 5g, No Sim, No network just scrolling FB, & Songs

Could you please post a graph of your battery so we have an idea as to how fast your battery is draining

Engineer blamed google apps n made me delete , a little better but life without google apps is very inconvenient

Same thing happened to me. I finally contacted Apple Support via Twitter, and after two phone calls, Apple agreed to take a look at the phone and fix it

I’ve been to the store and they recommended to download and install IOS update 15, which should solve the issue. I will give it a week to see if it happens again and return to the store

Experiencing the exact same "issue" with my iPhone 12 pro (128GB).

I compared it with my girlfriend her iPhone XR (64 gb) last night. Her phone started of with 64% remaining where mine was at 94%. Both phone were left idle over a time of 8.5 hours. The next morning the iPhone 12 pro drained two 84% while the XR was at 63%.

Both phones had almost no background activity and are connected to wifi (5ghz).

The only difference between them is that the iPhone 12 pro has dual sim set up and the XR only uses one (physical) sim.

But that shouldn't drain your battery that much, should it?

I always start my day with a fully charged phone and my 12 Pro, by midday only has around 40% battery left. The battery cannot last an entire day without charging in the middle of the day. Also the MagSafe charger is ridiculously slow. After close to 2 hours of charging I only got 10% more.

I spoke to Apple support today & they ran diagnostics saying that everything checks out. I imagine what this means is that there is a software issue causing the battery to drain - hopefully they sort it soon. It 100% isn’t normal for all apps to be closed, background app refresh off, Bluetooth off & lose 40% charge overnight. To illustrate here’s my battery view overnight.

I’m still experiencing inconsistent battery life... last night a11pm phone 100% charged but woke up at 8am and phone lost 25% just at idle . There’s something bad going on here and I believe software will not fix. Have our 11 pro max sitting next to it both taken off charger at same time at 100% and it lost 1% battery both running same iOS .

I bought an iPhone 12 Pro 256 Cosmic Gray. I already had an iPhone 11 Pro 256 Black.

I have no SIM in the new 12 Pro since I'm waiting for a flip protector case that they did not have at time of buying, before I do use the new 12 Pro phone. I know I'm parano but I prefer not taking chance to drop it.

I was charging it anyway since I wanted to test new features like Lidar. I saw it was draining fast the battery and was not too worry at first since I still have my 11 Pro and Lidar may be the factor here.. And I never look at battery life time with my old phone either since it suited my needs.

I began to log my use of the device when I let it completly unused on the table and it was at 23% at the end of day. I also rebooted the phone just in case and removed all App from "Task Manager".

here is my last log :

Nov 2, 11:37 AM unplug it leaving it in Airplane mode (remember I don't have a SIM in yet)

4:01 PM 88% left

9:18 PM 66% left

This morning 7:57 AM 23%

Here is the battery report: (my phone is in French but you should be able to understand)

Now I'm testing it with Energy saving mode still in Airplane mode.

I have the battery management mode enable too. That's my next test...

Will let you know.

I have the same issue with my iPhone 12, been a week since I found out that the battery drains 22-29 percent on idle each night. Really frustrating. I took it to the Genius Bar and the engineers there are not able to provide any workable solutions (background refresh off, location service while using or off, swip up and close all opened apps...nothing I dont know), at last their supervisor said it might be an issue with corrupted data and if it is determined to be the true cause, I will have to reset my phone and transfer my data bit by bit and hopefully the "corrupted part" is not transferred. The supervisor also said he read some of the logs and found my Photos app reads and analyse my photos at night and that might be one of the causes too...(wtf..). They did offer the option of a new service unit but they also told me chances are it won't solve the problem. Geez this is driving me crazy.

I also have been experiencing the same issue, typically drains by around 20% overnight with no clear culprit of an app. I was told to turn off Background App Refresh by an Apple Support chat handler which seems to have negligently improved the situation but this clearly is not what is causing the battery drain.

I just realized that only "dual sim" iPhone 12s are suffering from the battery drain. Even if only one sim is inserted, battery drains still. My friend's 12 Pro is regular single sim model and his phone's battery standby is amazing. That explains why my battery doesn't drain when airplane mode is on. But what causes my battery to drain if there's only one sim? Perplexing

Each active account maintains contact with its cell tower every few minutes, saying “here I am”. It does that so the network knows where you are when a call comes in for you. This “registration” is very expensive in terms of energy, as it is done at full power to assure a connection. If you have 2 active lines it will twice as much energy as one line.

Exactly same issue here. First night, I had a 20% battery drain. Second night, 18% so I thought it could be a network thing so I reset network settings. The following day, my battery drained 10% overnight. That was the only improvement, if you can call it that.