iPhone 13 Pro battery draining overnight

Well said Yanosh74. There is clearly an issue with the battery; whether it is mainly on the 13 series and/or has more to do with IOS 15.1, I don't know.

Have you reported it to Apple Feedback? (Google Apple Feedback to get to the correct page if you're not sure). Other than calling Apple tech support (and asking the rep to escalate to an engineer), this is the best way to ensure that the problem is highlighted to Apple. The more reports they receive from users in this way, the more likely they are to prioritise taking action to remedy the fault.

FWIW, my battery issues on a new 13 (initially running 15.1 and within a few days after purchase updated to 15.1.1) improved after resetting network settings - however, not to the extent that I am convinced that the battery is running as it should. I don't think the battery life of my 13 over a day's usage is any improvement on the 2.5 year old Xr that I had previously. Given that significantly improved battery life is supposed to be one of the 13's selling points, I would guess that there is still an issue.

While I am using the iPhone 12 mini, my experience echos many others here who are experiencing this with the iPhone 13. Due to the nature of the battery drain, this is certain to be a software issue exclusively. There is no hardware malfunction that could cause this.

Take note of the two regions of interest in the blue squares below.

The left-most section was overnight while I was sleeping and there was zero phone usage. The phone became hot, and as you can see, it slowly drained in a linear manner until it was almost dead.

The right was while it was on the MagSafe charger and with zero usage besides a brief period at around 4:30 p.m. While it had initially started charging like normal, the battery drained--while charging--until the phone was absolutely dead. Still resembles a linear pattern.

One doesn't need to take my testimony of "zero usage" to understand what the graph shows. On the left, there was absolutely no usage; and, as such, there are no dips in the linear response graph. On the right, there was a brief period of usage at the time indicated, but otherwise retains linearity.

This is, without a doubt, an issue with iOS and is something that Apple must address. Despite what others in the thread say, this is not due to having the wrong battery charging settings, or by having Background App Refresh enabled. If the latter is the cause, then it is still Apple's issue because Background App Refresh should not cause a total drain of the battery while charging. That implies that the feature costs more battery than simply using the phone as normal (video, Safari, games, etc).

Let's all hope this thread can raise awareness and see a fix to this in the next iOS update.

i done a iCloud signout and sign in , woke up to a battery charge of 100%. This after 8hrs. Let see if this " fix" holds over the coming days.

this issue seems to be 13 series related. I recall doing the same process sometime back which fixed the problem only to have it re occur after iOS updates

Just put your phone on airplane mode at night when you are sleeping.

Hello nosleduc,

Thanks for reaching out to Apple Support Communities. We've reviewed your question and it looks like you are experiencing rapid battery drain with your iPhone. It's understandable that you'd want this resolved, so allow us to assist with that. Please start by taking a look at the following articles, which can help with this issue:

• Why Lithium-ion?
• iPhone Battery and Performance
• Maximizing Battery Life and Lifespan

If you have follow-up questions, please let us know. We're here for you. Have a fantastic day!

JayMecina wrote:

The best solution is charge the battery overnight? Really? Is the same like if you say the the best solution for car with hole in the fuel tank is to refill more gasoline..

Nonsense. You charge overnight so most of the energy the phone uses overnight comes from the external power source rather than the battery, which extends the life of the battery because it has fewer discharge/charge cycles over its lifetime. And you get “free” automatic overnight backups, so you can never suffer substantial data loss.

Further, if you DON’T charge overnight all overnight data communications uses cellular data, because Wi-Fi is turned off when the phone is locked and not plugged in. And cellular data is the largest user of energy after the display, especially with a weak or intermittent signal. A 5 bar signal requires 50 MW of RF energy; a 1 bar, 600 MW, thus over 10 times as much energy is required for a weak signal.

Lawrence Finch wrote:

What will you learn by checking each day of the week? To be meaningful you should also review the list of apps that used energy each night, the number of new emails, texts, notifications, app updates, etc., (and their sizes) that occurred overnight.

While Apple no longer publishes standby time (as no one ever lets their phone be idle for more than a few hours) the last time it was published was 200 hours, which would work out to 0.5% per hour, or 12% per day if the phone was never turned on, did no email fetches, received no notifications, received no push email, received no texts, did not have any apps that updated their content.

Remember, when the phone is not plugged in Wi-Fi is off when the phone is idle, so all of the above updates would use cellular data, and signal strength would be a critical factor.

The bottom line is that battery drain is 100% the result of apps using energy. So the more (and busier) apps that use energy overnight (even when the phone is “idle”) will result in more battery drain. If you can’t (or don’t want to) limit the apps that use energy is all the more reason to charge the phone overnight, in addition to the fact that it extends the useful life of the battery and it provides automatic backup.

but why iPhone 12 Pro Max doesn't drain the battery as fast as iPhone 13 pro in nosleduc's case?

If sth doesn't drain the battery he even wouldn't have to think about overnight charging or not.

I have no idea what problem you think you have, as this is your first post in this 5 page thread. But the answer is to charge your phone overnight, as has been said several times. The absolute best way to get maximum use on a charge, as well as slow the decline of battery capacity long term is to enable Optimized Battery Charging (Settings/Battery/Battery Health) and charge the device overnight, every night. The battery will fast charge to 80%, then pause. During the nighttime pause the phone will use mains power instead of battery power, allowing the battery to “rest”, and thus reducing the need to charge the battery quite as often. The phone will resume charging to reach 100% when you are ready to use your phone; it will “learn” your usage pattern. If you enable iCloud Backup (Settings/[your name]/iCloud - iCloud Backup) the phone will back up overnight also, assuring that you can never lose more than the current day’s updates.

If you aren’t going to take advice from users who know what they are talking about there is no point in discussing it further. Do you have a phone, or a $1,000 battery monitor that you are obsessive about? You need to make up your mind. Enjoy your phone, or worry needlessly about the battery. That’s your choice.

That’s interesting. It must be the device that you’re attaching to because I have Bluetooth on all the time and it’s not an issue. If you go to the battery setting and take a look at the graph for the highest usage of the battery what do you see at that time?

Ok. Well my reply might be considered to be amateur by the seasoned iPhone pros. But I figure I’ll pass it on anyways. Because my phone is now fantastic. Spectacular battery life after a poor start. This is my first experience with an iPhone. I’ve been using androids for years and got fed up with the battery usage. I went all out for the latest iPhone 13 pro max. Initially I had some problems Including once again poor battery life. So I did some surfing and found these YouTube iPhone geeks known as “payette forward”. I followed a couple of their tutorials to learn about the phone. Turning things off like backgrounding. Putting it in dark mode. A whole bunch of other things I can’t even remember made a huge difference. If I don’t use my phone at all for a day I’ll only lose 2%! Overnight nothing it doesn’t move. It does it’s charging thing which is different. I don’t worry about turning off Bluetooth like I used to with my android. I’m Sure most of you guys already know this stuff but here’s one of the many tutorials. Hopefully it helps someone. Like it did me.

https://youtu.be/VtOUZckmSRE

This is my battery usage from last night into today.

I initially had this issue so turned on low power mode at night which seemed to help. But then after a recent iOS update it isn’t happening and I’m not using low power mode at night anymore. I also think that it takes a new phone a couple weeks or so to ‘adjust’ but I haven’t noticed this when setting up new iPad although tend to put on airplane mode overnight so that might be why. I remember this happening with other iPhones too but not nearly as bad as the 13 Pro - Thankfully it’s now acting normally!

Turn off Siri, restart the phone, and turn it back on.

My battery empties if I leave wifi on and bluetooth. Now I turn these two off it lasta a lot longer.

New phone? I had same problem and my phone was warm to hot 24/7. Did all the fixes I could find and spent 3 hours with Apple support. Got a new phone from my carrier and am having zero problems.