iPhone 15 Pro Max battery draining without use

It is not limited to the iPhone 15. My iPhone 14 Pro does that same thing for a couple of weeks / month now. Not sure when it started. Even during the day in airplane mode the battery drain stays the same. Location service on/off -> doesn't matter. Always on display on/off -> doesn't matter. No apps running when I check under Battery, doesn't matter -> constant battery drain per hour. LTE/5G disabled -> doesn't matter. Wireless disabled -> doesn't matter.

My iPhone 14 used to drain about 7% - 10% battery per night. I am right now at 30% or more and again during the day nothing makes a difference.

I erased everything and went back to all default (no restore / no additional apps) and that seemed to fix things and my battery drain is normal again.

I could try to add a few apps per day and monitor but it's really strange - especially because the phone doesn't show any apps in use - nothing. I think this started with IOS 17.x but I don't recall a 100%.

I read the thread but it doesn't answer the org question nor does it provide a solution.

As mentioned one solution for me is to do a factory reset (erase all content) and no restore of apps/data but that is not a good solution.

My iPhone 14 Pro (default apps - after factory reset) will last me 2+ days with everything enabled. AOD, location services, Car Play, WiFi, LTE/5G etc.

Once I restore my data/apps (org. data came from an iPhone 13) I am down to 15 hours of light use / standby and I need to re-charge. This was not the case previously. Airplane mode, low power mode doesn't make a difference, battery drain remains the same.

Settings -> Battery usage by apps shows nothing, (0), nada.

For the first 24-48 hours after installing an upgrade, battery use will be higher because the phone needs to rebuild all of its internal databases.

Further, check the Battery statistics; there may be apps on your phone that are not compatible with the new iOS and require updates.

I have the 15 pro and all I can say is worse battery I have ever had. I had my 11 since 2019 and got a replacement battery in it. Unfortunately it wasn’t an Apple but it was still ok even with my grandson using it on a 60 minute bus journey it still had life in it. Not this one my son has the x and I FaceTime my granddaughter she likes playing with the stickers etc we both started with 13%. And my phone switched off first over his. There is something seriously wrong

Which AI app did you get that from?

Item 8 is WRONG, WRONG, WRONG! AirDrop uses ZERO energy except during a transfer. Wi-Fi uses no energy except when connected, and NONE when the phone is asleep. Bluetooth uses NO ENERGY except when connected to a device. And if you turn all of those off Find My will no longer work. And neither will automatic nightly backup.

I am wondering if the iphone heats up like this in the beginning after backups are transpiring then after this everything cools down and the phone runs normally without battery drain and overheating?

I know I had these issues at first then after a week it all stopped and I haven't had the issues again.

I bought the iphone 15 pro about two months ago and this went on only for the first week then no more.

Has this been the case with anyone else?

Thanks.

It sounds like you are in an area with low cell coverage and are using cellular data.

The worse the signal reception in your area, the more energy is required to maintain contact with your local cell tower, which may result in the battery usage you see.

As always, the way to avoid such issues is to always connect your phone to a charger overnight.

I’m experiencing the same thing! Went from iPhone 13 Pro Max to an iPhone 15 pro max & my battery life is either the same or worse! I think it’s a processor issue. Because I can be on this site or the regular Apple website & it might go down 1-2% in 20-30 minutes while in use. But right when I close the safari app out & turn the screen off & yet in approximately 30-120 seconds the battery will immediately drain another 1-2% after I tap the screen for the screen to come on. So basically it uses more battery when not in use than it does while being used. The always on screen, location services, Siri, automatic updates & downloads, Bluetooth, iCloud cellular synching, hotspots, airdrop, background refresh, keyboard haptics, rise to wake screen, etc. are all off.

Even if everything is off, your phone still expends a fair amount of energy to stay in contact with your local cell tower, especially on 5G.

If your signal is low, the battery use will be even higher.

Hi Everyone!

I've got the same problem in my new iphone 15 pro max.

It has a clear battery drainig problem. My iphone 13 pro max was immortal, when not in use it dropped max 1% in one night. The 15 pro max is always dropping percentage and it last worst then an 83%(battery capacity) iphone 13 pro max.

For sure it is a software problem, we need to find the cause that affect us. Probably it's just a bug on some settings that makes the software spend energy for no reason.

Thanks everyone!

My iphone 15’s battery has been draining so much after the 17.4.1 update. There used to be just a 2-3% drain overnight over a period of 8-9 hours before the update. But after the update i’ve been seeing 15-20% battery drain overnight. I don’t know what’s happening.

Was charges 100 % before I fall asleep . Battery drain to 76 % once I wake up . Shall I active airplane mode while sleeping ?

I fully charges my phone and go to bed . Once wake up left 76 % . Why did it happen.

if charge while I sleep . Won’t be over charge?

Please read the rest of this thread, then come back with any questions that the thread does not answer.

Wow what a change! So you didn’t restore from backup? Just signed in to iCloud?