iPhone 15 Pro Max battery draining without use

Something is clearly running in the background on your phone even when you’re not using it. Look at the battery usage and see what the high usage item(s) are. Look at how much of that usage is background. If you don’t absolutely need it to use background use turn it off. Maybe delete the app(s) in question and re-install to see if that helps. Otherwise…maybe let your phone charge overnight so it will still be 100%. It won’t overcharge if that’s a reason why you aren’t letting to charge overnight. But your settings and apps work all of the time. Notifications come through…that’s using battery. Emails coming throughout the night? Same. You don’t have to be physically using your phone for it to still be using battery life.

This is my battery drain on how it used to be for the last couple of weeks/month:

Phone is/was in airplane mode during night time (no app usage) but no change in battery consumption vs day time.

This is from yesterday (after I did a factory reset and just re-added my iCloud account photos etc).

After almost 24 hours it went from 82% to 72% (estimate) = 10% for 24 hours. Similar usage pattern.

Battery drain at night is almost nothing - maybe 1% - 3% or so.

celaine1211 wrote:

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

No, you should charge while you sleep, so whatever energy is used comes from the power mains and not the battery.

celaine1211 wrote:

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?

The “charger” is a circuit in the phone. It stops charging at 100%, so it is thus not possible to overcharge an iPhone (or any Apple product) by leaving it plugged in.

Any cell phone uses energy continuously, as long as it isn’t powered off. This means that if it is not connected to power for 8 hours the battery level will be lower at the end of that time. How much lower depends on what apps you have, how many notifications you have enabled (which will be delivered and processed by apps even if you force close apps-they will relaunch when a notification arrives), and, probably most important, how strong your cellular signal from the network is; your phone maintains a "conversation" with the network so your phone can be found when a call or text arrives, and low signal strength requires much more energy to do this update to the network. Thus, you should be charging your phone overnight so this nighttime usage is powered by the external source rather than the battery.

BrianaLynn23 wrote:

No there is definitely something wrong with the new iPhone 15 batteries. I am experiencing the same thing and my iPhone 13 did not drain this quickly. I am surprised there is nothing out there addressing this issue and just articles stating it could be “apps running in the background”. That’s not a good enough answer.

No, there is definitely nothing wrong with the new iPhone 15 batteries. However, there may be something wrong with YOUR iPhone 15, so make a genius bar appointment to have it checked out. How you can generalize from one phone to 100 million iPhones is truly remarkable.

Kaftoy wrote:

And I do not agree with the overnight charging concept, because this issue is not limited to what happens during the night. It's the same drain while keeping the phone in the pocket during the day. If you do not carry a charger or a powerbank, you end up with low battery in the evening, maybe when you need it. Imagine a 1 day trip in the country-side. You want to be able to count on the phone to not drain while in the pocket. I was once in this situation, got lost in a natural park in Croatia, evening was near, got my 14 out and oriented fast.

Whether you agree or not, it is what Apple recommends, and it extends the useful life of the battery because nighttime energy use comes from the external power source rather than the battery, thus reducing the number of full charge cycles over the life of the phone.

I’m using iphone 15 pro max for almost 2 months.In 17.2 I didn’t seen overnight battery drain even if my internet was on at night,but after updating to 17.3 my phone’s battery gets low fastly,and even when my internet,bluetooth,wifi and even location services were off my battery got dropped overnight.Apple this is not what to expect form 15 pro max.17.1 was the best in terms of battery,but now in 17.3 it’s really bad.

1. Check Battery Usage:

- Go to Settings > Battery to view the apps and processes consuming the most battery. This can help identify any specific app or service causing the drain.

2. Background App Refresh:

- Disable unnecessary background app refresh for apps that don't require real-time updates. Go to Settings > General > Background App Refresh.

3. Update iOS:

- Ensure that your iPhone is running the latest version of iOS. Apple often releases updates that address bugs and improve battery efficiency. Go to Settings > General > Software Update.

4. Reset Settings:

- Resetting settings can resolve issues related to misconfigured settings without affecting your data. Go to Settings > General > Reset > Reset All Settings.

5. Optimize Battery Charging:

- Enable "Optimized Battery Charging" in Settings > Battery > Battery Health. This feature helps slow down battery aging by reducing the time your iPhone spends fully charged.

6. Disable Location Services:

- Turn off location services for apps that don't require them. Go to Settings > Privacy > Location Services.

7. Check for Rogue Apps:

- Delete or update apps that are known to cause battery drain. Check the App Store for updates or consider reinstalling problematic apps.

8. Turn Off Unnecessary Features:

- Disable features like AirDrop, Wi-Fi, and Bluetooth when not in use. Adjust display settings and reduce screen brightness.

9. Check Battery Health:

- Go to Settings > Battery > Battery Health to check the overall health of your battery. If the Maximum Capacity is significantly reduced, you may need to consider a battery replacement.

10. Contact Apple Support:

- If the issue persists after trying the above steps, it's advisable to contact Apple Support. They can provide more specific guidance based on diagnostics and may offer further troubleshooting steps or recommend service options.

This is ridiculous and annoying. I am having similar issue with my iPhone 15 pro max . Initial days battery backup was really awesome. Now I have to charge it twice a day . Request apple to look into this matter seriously. We are investing huge chunk money for premium segments and getting disappointed with such type of issues

It's likely an app on your iPhone 15; what does Settings -> Battery say is using most of the power?

You can always use Low Power Mode if it's an issue; my iPhone 15 Pro Max certainly does not do that.

Use Low Power Mode to save battery life on your iPhone or iPad - Apple Support

I had an iPhone 12 Pro and it was fine with battery. I listen to podcasts at work and I would get out of work with 70-80% remaining. I now have an iPhone 15 pro and I get out of work and am at 20% and need to charge when I get home. It’s wild, the battery clearly has an issue. Not doing anything different that would use battery like that. According to my battery section in settings it says Spotify running in background used 11% battery life in 1hr 20mins of background use not screen on. So in my 10hr shift I’m lucky if I get out with 20% remaining. iPhone 12 Pro I’d walk out with 70% remaining easily

I just bought an iphone 15 pro and the battery kept draining fast. I remembered with my 11 and 13 pro I had the same problem until I turned off location services. Once I turned off location services on the 15 pro it fixed this problem as well.

Hope this helps anyone out there who have noticed their batterys draining so fast.

San Diego

I recently migrated to IPhone 15 pro max from iPhone XS Max .

I too am experiencing that my iPhone 15 pro max is discharging much faster than iPhone XS Max with similar apps and usage. Phone is mainly on Wi-Fi at home / office or on 4G network , 5G network is ON only on very rare occasions ( may be 5mins in entire day) .

I still have my iPhone XS Max with me and it battery health is 80% but it gives me a better battery back up than the new iPhone 15 pro max with 100% battery health.

Watching YouTube is actually one of the more computationally complex (as well as CPU and battery-intensive) things any device has to do, especially now that most content is in HD or 4K, even more so if you are doing so over a cellular connection.

That wasn't the case in the past.

Whether you are actively using the phone or not, it is continuously in contact with your local cell tower to let it know that it is there and available to take calls and receive text messages.

This can consume a fair amount of power, especially if you have a 5G connection to the cell tower and have two bars or less of cellular signal strength.