iPhone 12 battery drain overnight

Tonight I changed network setting. I use 5G auto instead of 4G, I set it on 4G because I don’t have a 5G contract and I thought it was the best setting for me. Tonight I only had 4% drain with everything on and it was almost 10 hour standby. I will keep trying this settings some days now.

Iphone 12 battery.. Definitely something not right. I have had many Iphones and this is the first time a brand new phone needs constant charging throughout the day. Obviously examined possible causes, such as looking at Battery in Settings and notice that Home and Lock Screen use 22% of battery. Do I switch it off?

Homescreen time accumulates because you are unlocking your phone, swiping through home screen pages etc.

Lockscreen time is basically every time you check the time, a notification lights up the screen when the phone is locked etc.

The only thing you can do to reduce the home/lockscreen time is straight forward, use and check/wake up your phone less. Disable notifications for apps you don't really need to be notified by. Place your phone face down. This will still allow notifications in, but without lighting up the display.

Guys. For the past two days I have done the following:

Close all apps

Restart phone

Turn off wifi and bluetooth

Turn on low power mode

I have had a power drain of 6% and 4%. That is still better than 20%. I will keep testing.

I also have this problem and there is a longer thread about this elsewhere. Try not using bedtime mode if you use that. I noticed that the problem is very visible during the night and always starts at midnight and that happens to be when my bedtime mode activates. Tonight I tried activating bedtime mode earlier in the evening and the phenomena starts right away. A steep battery drain and Siri using 100% background.

12 pro, one sim ios 14.3. Sim card removed and no more drain overnight at all. left with 100% charged and awake with 100%. However, after 30min reading the news dropped down to 88, which is abnormal.

Absolute nonsense. Dark mode (at least on OLED devices) is more battery efficient as pixels displaying black simply turn off, thus not using any power. As long as you aren't using your phone above 80% brightness all the time, and dim the screen accordingly to the environment you are in, Auto Brightness itself is only a helper and having it enabled neither uses more nor less battery.

The good thing at this point, considering iOS 14 in general and all the bugs and flaws that snuck into the final releases, it can only get better, am I right lol

If I think of all the people with especially the 12 Mini who did report having a fully charged phone in the evening and then waking up to it having drained completely, it can hardly get any worse than that.

Hey, same here. I have an iPhone 12, first couple nights battery drain was normal, and then tonight I experienced nearly a 20% battery drain. Every connectivity setting was off, and also background refresh on apps and location deactivated. It needs to be a software issue, right?

Happens to me too. I got the 12 Pro Max in November 2020 and things were going fine until 2021. The battery would drain 15-20% overnight. I got scared because before the 12 Pro Max I had a 6s, and that would drain 50% overnight. I am scared the same thing might start happening.

Not to sound like a broken record or repeat after people, but in this case, just plug it in. Otherwise it puts an entire charge cycle on the battery every night + one cycle during the day (considering your usage) and you will have reached the very end of the expected battery lifespan in only a couple more months. (Since you most likely had the phone for at least a year already at this point)

What is running in the background (screen off) so much on your device? Especially what kicks in at night for 5+ minutes every hour. Not that I would fully suspect that to be the origin of the battery drain but still I am curious. Could you screenshot the lower portion of the usage screen?

Same problem here, iPhone 11 Pro, 91% battery health. It discharges almost 20% overnight. I use an Apple Watch S4 to track sleeping. The drain happens only if I leave Wifi, cellular data and bluetooth on. If I set airplane mode and leave bluetooth ON the drain almost dissapears. This never happened before the iOS 14 update.

While everyone is throwing out countless theories of what the cause of the battery drain is, I'll throw one out there that is totally different. First off, last night my new 12 mini battery went from 88 percent to 30 percent in 8 hours overnight while sleeping. I'm using the newest/latest apple fast charger, that I bought from the apple store when buying my phone. Maybe the battery is saying 88 percent, but it's not really 88% charged. Maybe there's something all tangled up in the battery readout. That's a longshot for the cause, but so are all the other posts.

I'm gonna try basically shutting everything down, so it's not running a million processes in the background while sleeping, and even throughout the day. Beyond that, 3 attempts to fix it through apple support have failed. And I'm NOT plugging my phone in at night to mask the problem, just because some people here on the forums insist that's what people should do.

The more I see all these new features, the more I want to go back to a phone that just did 3 things; phone, emailing, and texting. SIMPLICITY. And I'd like to have ONE button that turns off tracking and data mining in every app, every setting, everything. But hey, I'm old school I guess. The more things the phone does for you, the more it, and the company takes from you. And that is absolutely undeniable in a broad sense. Tech is a double-edged sword. It was great at first, but the more advanced it gets, the more it just gets in the way of real life that actually matters. Here comes the "off topic" police, I imagine. Oh well.

Nothing in your rant of value to end users.

Charging the device when you are not using it is the only way to maintain battery health.

Turning this "off" and then back "on" also wastes the battery.

You don't have to change your habits. You'll just need to change your battery.

This is a discussion about trying to solve a specific problem. The overnight battery drain needs to be fixed, as it's possibly indicative of a larger problem or could lead to other problems. Has Apple come out publicly and said "Dear Apple end users - the massive overnight battery drain is normal, so please always keep your phone plugged in at night." ?? No they haven't. Is it wrong for end users to take note of a sudden dramatic change in how their phones perform at night while they are supposedly idle? I got the Mini because I mostly don't use apps and watch video, etc, thinking I could have a lighter phone and that the battery would be fine. But it turns out even doing NOTHING on the phone, when it should be sleeping, it drains nearly the entire battery on some nights.

And who are you to decide my comments have no value to anyone? That's a pretty harsh thing to say. I'm an individual, just like everyone else with thoughts and opinions. Apple cherishes individuality I thought. But I have no value to you. See, this is what tech brings, chatting on a forum and responding to someone who makes harsh blanket statements not knowing that person.