iPhone 18 Pro battery drains quickly with low screen-on time

Is my iPhone 18 Pro battery drain normal?

I have a persistent problem with my iPhone battery draining much faster than the reported screen-on time would suggest. As shown in the screenshot, I used about 50% of the battery while getting only slightly more than one hour of screen-on time. On a full charge, I usually get no more than two to three hours.

This has bothered me for several iPhone generations. Starting with the iPhone 11, I used to get almost two days of battery life. I later upgraded to the 13 Pro, then the 16 Pro, and now the 18 Pro. Battery life is supposedly improving with every generation, but that has not been my experience. I regularly see people posting screenshots showing seven or eight hours of screen-on time from a single charge, while I get nowhere near that.


I have already tried almost every commonly suggested solution, including:

  • Completely disabling Background App Refresh
  • Enabling Adaptive Power
  • Disabling unnecessary location services, including several system services
  • Using Wi-Fi for most of the day
  • Enabling Low Power Mode when I know I will be away from a charger all day

The only thing I have not tried is setting up the iPhone as a new device instead of restoring from a backup. I would rather avoid that because getting all my apps, accounts, and settings back to their current state would probably take hours.


Some additional information about my setup:

  • An Apple Watch GPS is connected to the iPhone
  • I also use an iPad, MacBook, and several HomePods at home
  • My iPhone has a managed work profile installed, although the battery issue existed before I installed it
  • I use a few location-based automations, such as enabling the Apple Watch’s always-on display when I leave home
  • I also have automations that run when an alarm goes off
  • My previous iPhones, especially the 13 Pro and 16 Pro, often became unusually warm even during light use. The 18 Pro seems slightly better in this regard
  • I sometimes suspect poor cellular reception might be responsible, but I am connected to Wi-Fi most of the time


The phone does not constantly die during the day, but the battery drain is still frustrating, especially when I compare it with other people’s results. If I were getting the battery life these phones are supposedly capable of, I would need to charge less frequently, which should also help preserve battery health over time.

Does this level of battery drain look normal, or is there likely something wrong with my setup? Have some of you experienced the same (maybe after getting a Apple Watch or starting to use automations?)


I am grateful for every suggestion regarding this topic as I'm getting tired of this. I love my iPhone in every other regard but driving to work for a hour while only listening to music and losing 15-20 percent is a real downer.


Thanks!


[Edited by Moderator]

iPhone 18 Pro

Posted on Sep 21, 2026 9:51 AM

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Question marked as Top-ranking reply

Posted on Sep 28, 2026 12:43 PM

I had the same problem with my iPhone 18 Pro. I lost around 60–70% of my battery during 8 hours at work. I only sometimes checked a few apps — Weather, Messenger and WhatsApp.


On the first day, during the first configuration, my iPhone restarted 4 times in a row. I lost around 30% of my battery, and it was really hot. The next day, my battery was horrible. Even when my phone was locked, my battery was still draining.


Days 3 and 4 seemed to be better. My battery started working better, but it was only for two days. On days 5–7, my battery started getting worse than on the first and second days.


Of course, I always read a lot of information saying that this is normal. The battery needs more time, but I feel that it is not normal. I understand that the battery can work worse for a few days, but not 1% every 2–3 minutes. My iPhone 13 Pro, which has only 76% battery health, sometimes works better.


I tried everything, but the battery kept getting worse.


Today, I contacted Apple Support. My iPhone had a few diagnostics. I heard different feedback. I heard that it was normal, that my phone needed more time, and that a new version of iOS would improve it. But finally, I heard about a red bug — a software problem, and the software was unstable. This problem had an impact on my battery.


My iPhone is going to be returned. I’m waiting for a new iPhone.


I recommend running diagnostics on your iPhone as well, because this doesn’t look good.

25 replies

Oct 10, 2026 2:56 AM in response to dmax0304

Unfortunately, I didn’t get a new iPhone. My iPhone just got a new software version, 27.0.1, which should be helpful, but I’m not sure.


Yesterday, I transferred my data from my iPhone 13 Pro to my iPhone 18 Pro, and currently, the battery drain is terrible — around 1% every 2 minutes. I don’t understand this situation because Apple Support found an error with my iPhone, but when my iPhone was sent to the service centre, they said everything was fine.


I’m really frustrated because I’ve been using iPhones for around 12 years, and I’ve always been really happy with them. However, this is currently the worst iPhone I’ve ever had. It’s not normal that I have to wait a few days or even a week for my iPhone to work normally, especially when it’s supposed to be the best iPhone.


Honestly, I feel cheated by Apple. This phone is absolute ****.


This is really disappointing. I hope my iPhone will improve over the next few days. Currently, I can see that indexing is in progress, so hopefully, that’s a good sign.


Maybe someone else has experienced the same situation and their iPhone started working better after a few days?

Oct 15, 2026 6:08 PM in response to dmax0304

I have the same issue. It's been a month so indexing has to be complete and the exact same app background refresh that had been taken place on my last ten iPhone are on this new 18 pro max 2tb. Anyway the battery life is absolute trash. I'd lean towards defective it's so bad. My 17 would get me through the entire day and if I didn't charge at night would still have enough juice to get me to work. This new one is noticeably less. By 9pm I'm below 10%. I'm writing this in hopes apple reads to correct. I have put on low power mode now removed apps for refreshing and all the other 'tricks' is still trash. Considering going back to my 17pro max and this is coming from a diehard apple fan.

I did also upgrade my Apple Watch pro from 3-4 at the same time as this phone and the battery life on the watch is significantly better so I know it can be done and there's clearly an issue with the new phones battery or some. Hope they get it fixed soon and the fix is software so I don't have to buy or warranty out my $2500 phone.

Oct 20, 2026 5:58 PM in response to dmax0304

Has anyone been able to figure out what’s wrong ? Do we need to get the phone replaced? I started using my phone since 2 days now and it’s completely synced but loses 1% battery every other minute. I’m using WhatsApp and Instagram and maps only. This is very frustrating. My phone was down to 47% with barely any use between 7 am to 5 pm.

Oct 21, 2026 8:22 PM in response to dmax0304

Coming from iPhone 17 Pro Max, I could tell something is off. Every time i see the low battery icon, I go “this can’t be right”. I need to charge the new phone every 3-5 days. My 17 Pro Max went weeks without charging! I don’t trust this one bit.


I should add that my phone is on idle for the most part of the day with no social media or heavy app usage.

Oct 21, 2026 8:20 PM in response to AM7655

AM7655 wrote:
Coming from iPhone 17 Pro Max, I could tell something is off. Every time i see the low battery icon, I go “this can’t be right”. I need to charge the new phone every 3-5 days given that it sits idle for the most part of the day. My 17 Pro Max went weeks without charging! I don’t trust this one bit.

It doesn't matter whether you use your phone heavily or not. iPhone was never designed to go days on a single charge. And the absolute best practice is to plug your phone in to charge when you go to bed at night and leave it charging ALL night EVERY night, with the phone connected to Wifi, so it will automatically backup while you sleep and for normal housekeeping/indexing activities to run in the background as well.


My iPhone goes on it's charger when I go to bed, even if the battery says it has 90% left.


Read this --> When to charge your iPhone or iPad - Apple Community


iPhone 18 Pro battery drains quickly with low screen-on time

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