iPhone 14 Pro Max iOS 16.5.1 Battery Drain and Heat Issues

What I did is given below

1. Took a backup on iCloud (Which I do regularly)
2. Logged out of the Apple ID
3. Erase --> Erase iPhone - Apple Support (IN)
   1. Keep eSIM Data was the option I chose (See the pic)
   2. .
4. Set up my iPhone and restored it from iCloud Backup
5. 

I continued to have the same issue with the heating.

I repeated the above steps but this time I did not restore from the iCloud Backup. I set it up as a new iPhone.

Waited for 3 days. There is no heating issue, now.

Conclusion.:

• There is no hardware issue!
• This is not an iOS 16.0.3 issue
• Some Apps or iPhone storage and some settings may be heating up the device.

Action Plan:

• I will now slowly get my all data back one by one.
• Using the elimination process I will try to find out which app or settings were causing this...

Now the heating issue isn't there anymore. I am adding apps one by one and keeping tab on the heating issue.

My experience says this is purely caused by some third-party app that you may have installed.

I am not aware of the ambient temperature in which you are using the iPhone. However --> Keeping iPhone, iPad, and iPod touch within acceptable ...

Store the device where the temperature is between -20º and 45º C (-4º to 113º F). Don’t leave the device in your car, because temperatures in parked cars can exceed this range.

Use iOS devices where the ambient temperature is between 0º and 35º C (32º to 95º F). Low- or high-temperature conditions might cause the device to change its behavior to regulate its temperature. Using an iOS device in very cold conditions outside of its operating range might temporarily shorten battery life and could cause the device to turn off. Battery life will return to normal when you bring the device back to higher ambient temperatures. Using an iOS device in very hot conditions can permanently shorten battery life.

Protect & Prolong the Life of your iPhone's Battery:

1. About the battery usage on your iPhone, iPad, and iPod touch ...
2. Batteries - Maximising Performance - Apple (IN)
3. iPhone Battery and Performance

Try some of these options too.

To prolong the life of your iPhone battery, you can follow these tips and best practices:

To prolong the life of your iPhone battery, you can follow these tips and best practices:

1. Optimize Battery Charging: Enable the "Optimized Battery Charging" feature on your iPhone. It helps reduce the wear on the battery by slowing down the battery aging process. You can find this option in Settings > Battery > Battery Health. About Optimized Battery Charging on your iPhone - Apple Support (IN)
2. Avoid Extreme Temperatures: Extreme temperatures, both hot and cold, can negatively impact your battery life. Avoid exposing your iPhone to excessive heat or cold, such as leaving it in direct sunlight or in a freezing car.If your iPhone or iPad gets too hot or too cold – Apple Support (UK)
3. Use Original Chargers and Cables: Always use Apple's original chargers and cables or certified third-party accessories. Low-quality chargers or cables can damage the battery and reduce its lifespan. Identify counterfeit or uncertified Lightning connector accessories - Apple Support (IN)
4. Avoid Draining the Battery to Zero: Charge it whenever the charge becomes lower than 20%. The rest is up to you when to charge. how long to charge, how often to charge, which adapter to use starting from 5W to 140W USB-C Power Adapter etc.
5. Optimize Display Settings: Adjust your display settings to optimize battery life. Lower the screen brightness, enable auto-brightness, and use shorter screen timeout durations. Adjust the display and text size on iPhone - Apple Support (IN)
6. Minimize Background App Refresh: Limit the number of apps allowed to refresh in the background. Go to Settings > General > Background App Refresh and disable it for apps that don't require real-time updates. Switch apps on your iPhone, iPad, or iPod touch - Apple Support (IN)
7. Disable Push Email: Push email notifications can drain your battery quickly. Instead, set your email accounts to fetch data manually or at longer intervals. You can change this setting in Settings > Mail > Accounts > Fetch New Data.
8. Disable Unnecessary Notifications: Reduce the number of unnecessary notifications you receive. Go to Settings > Notifications and customize which apps can send you notifications.
9. Limit Location Services: Some apps use GPS and location services in the background, which can drain your battery. Go to Settings > Privacy > Location Services and disable location access for apps that don't require it.
10. Update iOS: Keep your iPhone's operating system up to date. Apple regularly releases updates that can include optimizations and improvements for battery life.
    1. Update Over-the-Air (OTA) —> Update your iPhone or iPad - Apple Support (IN)
    2. Update using iTunes/Finder —> Update your iPhone, iPad, or iPod touch - Apple Support (IN)
11. Enable Low Power Mode: When your battery is running low, enable Low Power Mode in Settings > Battery. It reduces power consumption by disabling non-essential features.
12. Avoid Battery Drain during Storage: If you need to store your iPhone for an extended period, make sure to charge it to around 50% first. This helps prevent the battery from draining completely, which can be harmful.
13. Disable Dynamic Backgrounds and Motion Effects: Dynamic backgrounds and motion effects use additional processing power and can impact battery life. Use a static wallpaper and disable parallax motion effects in Settings > Accessibility > Motion > Reduce Motion.
14. Limit Widgets: Widgets on the Today View can consume battery life. Remove or limit the number of widgets displayed by swiping right on the home screen, scrolling to the bottom, and tapping Edit.
15. Adjust Auto-Lock Time: Shorten the auto-lock time on your iPhone. Go to Settings > Display & Brightness > Auto-Lock, and select a shorter time interval to turn off the screen more quickly when not in use.
16. Use Wi-Fi Instead of Cellular Data: When possible, connect to Wi-Fi networks instead of relying on cellular data. Using Wi-Fi consumes less power than using cellular data.
17. Enable Airplane Mode in Low or No Coverage Areas: When you're in an area with low or no cellular coverage, enabling Airplane Mode can prevent your iPhone from constantly searching for a signal and draining the battery.

By following these tips, you can help prolong the battery life of your iPhone and maintain its overall performance over time.

I also started to face this issue since I updated to 16.5.0. I purchased iPhone 14 on 8th May 2023 and I am using this as a secondary device. No games, no heavy apps and minimal use. Still, after the recent update to 16.5.1, my battery health has dropped to 98% and the device gets noticeably hot with normal web browsing.

I have reached to the online Apple Support but they were of no help. Nobody acknowledged the issue and asked me to get the battery change if I was facing the issue, that too chargeable.

Highly disappointed with the iPhone.

I have the the 14 Pro Max. I’ve had it for just over a month. It worked great until the 16.5.1 update. I had the battery and heating issues as well. Another one is text messages and pictures disappeared after the update. Not all of them, but enough that were noticeable. I have texts set to keep forever and I lost over a years worth of messages. I have apps that keep freezing or won’t load. Other ones random like signed me out and made me redo everything. I had the 11 Pro Max for almost 3 years and didn’t have any of these issues. This last update really messed up my phone.

I'm finding a probable lockscreen issue that regularly kills my battery with flashlight and camera.

Camera is sneaky -- it isn't attention grabbing like flashlight.

(I'm searching for a way to kill those lockscreen icons that I am somehow accidentally butt-calling)

Look in your Settings >> Battery>> Scroll down to see what apps are biting you.

A friend went to Verizon and explained what was going on with his phone. Pretty much everything that we are all experiencing. They told him that it’s happening to everyone with an iPhone and after these updates. They said they could fix it in store. I don’t know what they did, but apparently it fixed his phone.

IOS 16.6 Will fix this issue.

Apple will not acknowledge, or notify us of this - They despise us, and treat us like $h!t.

if we have to disable all these then what's the use of buying so an expensive premium phone? you should come up with a solution to deal with all these rather than telling users to stop or minimize services.

I’m hatting my iPhone 14 Pro Max. I have been in Apple 4 times in the genius bar and they don’t what to change me the phone and I am experiencing the same problem of the 258 people who have reported the same issue of battery draining and heat in their phones. I have Apple care and I paid more than 1,400 dollars in a phone that I use for my work and know I borrowed an iPhone 10 in order to work. This is really unfair. Any thing someone can help me do ???

No improvement even after the 16.6 update.

Removing posts rather than resolving the issues. Welcome to Apple community.

Same I think it’s actually worse mine just started overheating with 16.6

Having the same issue. I have only had this phone for 8 months😡

Same issue with my iPhone 14 pro. Frustrating. My son’s phone, a cheap LG works better. This might be my last IPhone.

Verizon fixed this "in store" or did Apple?

Did they articulate what was done to the device?

Was it under AppleCare?

Appreciate more details.

Cheers.