IOS 16.4.1 (a) rapid response Battery Drain

It worked for me and my config at least, after trying out all the other recommendations found online which didn't help at all (not even moving up to 16.5).

I even replaced my 85% cap over heating battery for a new one (in retrospect I don't think that would have been necessary).

The fast battery drain came just after updating to 16.4 on my iPhone 12 mini.

I performed a back up of my iPhone, did a factory reset and restored from my back up. Except for banking connections which I had to re-establish, everything else came back just fine, including emails settings and Google Authenticator (which I had anyway backed-up just in case). Now my battery lasts the whole day and into the evening again...

SOLVED (at least for me) : I had the same experience after updating my iPhone 12 mini to IOS 16.4.x. All the good advices out there didn't help at all for me except one : RESET to factory the iPhone (I even went through a battery change a week before resetting - it was just above 80% anyway).

I restored from my iMac backup and all went fine, including Google Authenticator (although there I accepted to "backup" the data to my Google account beforehand - just to be safe - but it was not needed) since I was restoring to the same iPhone).

Some apps needed to be re-linked (such as banking apps) and while I was able to reconnect to the Signal messaging app, all previous conversations were lost (but I have them in full on my iMac).

All is working fine now.

To uninstall this Rapid Security Response update, go to Settings -> General -> About -> iOS Version -> Remove Security Response.

I ve uninstalled the update and everything is fine again.

Troubleshoot the problem. There is nothing magical about battery drain. What uses energy:

• #1: Cellular phone calls and data, especially if the signal is weak
• #2: Apps

That’s it; those are the only things that use measurable amounts of energy, so whatever is draining the battery is using a lot of cellular data when signal strength is weak, or one or more apps. Go to Settings/Battery and see which apps are using the most energy.

If the issues you have described are a direct result of the iOS 16.4.1 (a) update, it is highly likely that a substantial number of users who have performed the software upgrade are encountering a similar problem.

I have iPhone 12 Pro and I do not any such issue as described by you.

Without a precise understanding of the underlying issue, it may be challenging for forum members to provide targeted solutions to the difficulties you are encountering.

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.
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.
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.
4. Avoid Draining the Battery to Zero: Charge it whenever the charge becomes lower than 20%
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.
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.
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.
11. Limit Background App Activity: Close or force quit apps that are running in the background but are not needed. Double-press the home button (or swipe up from the bottom on iPhone X or later) and swipe away the unnecessary apps.
12. 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.
13. 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.
14. 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.
15. 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.
16. 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.
17. 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.
18. 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.
19. Disable Background App Refresh for Cellular Data: If you have limited data plans, consider disabling Background App Refresh for cellular data to reduce data usage and preserve battery life. You can find this option in Settings > General > Background App Refresh.

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

I have had my phone die twice now while I was sleeping. Only thing on was the alarm clock. When I look at the. Artery the last two times it said the magnifier was the culprit, 60% of the battery use. Deleted the app so I will see if this fixes the problem. I was not aware of this feature nor using it.

Apple podcasts appears to be the underlying issue for me. Draining significant battery in the background

I restored my phone to factory settings and it worked. The resetting fixed whatever issue was draining my battery.

What it loses over two weeks is irrelevant, because the loss isn’t linear. All that matters is how long it has been since the phone was new. Plus the fact that a drop from 98% to 97% is never a 1% drop; it is a drop from 98.0% to 97.9% and thus is a 0.1% drop, because the calculation does not round, it truncates.

Batteries are consumables; they lose a little capacity every time they are discharged, then recharged. On average this works out to about a 1% loss for every 25 “full charge cycles”. As one example, if you charge the phone overnight, every night (and that is what you should do; it is a best practice), it starts the day at 100%. If it drops to 20% by the end of the day before you charge it again overnight that counts as 0.8 full charge cycles (20% to 100%), or about 24 full charge cycles per month of use. For this example your battery capacity will lose about 1% per month. Of course, if the end-of-day level is higher than 20% the capacity loss will be a little less, and if it is lower than 20%, or you charge it during the day, the capacity loss will be higher.

Once the capacity drops below 80%, or if there is a message in Battery Health that the battery is not meeting peak performance expectations, it’s time to change the battery→iPhone Battery Replacement - Official Apple Support

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. Here's more information→About Optimized Battery Charging on your iPhone - Apple Support

Well, the easiest way to deal with the phone dying overnight is also the best practice for managing battery capacity and life: Charge the phone overnight, every night, with Optimized Charging enabled.

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. Here's more information→About Optimized Battery Charging on your iPhone - Apple Support

Click here→The last update killed my battery! - Apple Community

Make an appointment at the Apple Store or authorized Apple Service shop to have them check the battery.

Scout the dog wrote:

My battery is dying SO fast under 16.4.1 a? What can you all do about this?

No one here can do anything about it.

What model phone do you have? How old is the battery? Go to Settings>Battery>Battery Health. What is the percentage next to Maximum Capacity?

I uninstalled the rapid response update and rebooted. Appears to be better.