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sukhberik
User level: Level 1 (4 points)

iPhone 18 Pro Battery Issues

My iPhone 18 pro has had crazy battery issues, I have no idea what is going on. I have had my iPhone for a month now and it has not got better. Over night I lose over 40% with nothing running.


[Edited by Moderator]

Posted on Oct 31, 2026 3:04 AM

4 replies

Jeff Donald
User level: Level 9 (64,078 points)

Oct 31, 2026 3:25 AM in response to sukhberik

WhatsApp may be having an issue. The app has been updated 17 times in the last month. The most recent update was yesterday. Meta support recommends deleting the app from your iPhone, restarting your iPhone and then downloading and reinstalling a fresh copy from the Apple App Store. I would follow there advice and observe you overall battery performance over the next 7 days. Good luck.

SravanKrA
User level: Level 10 (454,138 points)

Oct 31, 2026 3:21 AM in response to sukhberik

The measure of battery health deterioration/drainage is subjective and can vary depending on individual usage patterns. There is no universal standard to determine whether the battery health deterioration/drainage is normal or abnormal because it heavily relies on how the battery is used and maintained.



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
  4. About Charge Limit and Optimised Battery Charging on iPhone - Apple Support (IN)



Watch a Video made by Apple:

https://www.youtube.com/watch?v=MVm3LDWhXn0



Try to monitor Battery usage by iPhone Activity as shown below


What is shown under battery usage? Checking that would give you an indication of the usage behavior.

  1. Background Activity
  2. Notifications
  3. Connected to Charger
  4. Or any Other




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)


LD150
User level: Level 10 (107,674 points)

Oct 31, 2026 3:14 AM in response to sukhberik

40% overnight is not unusual because they do housekeeping and are designed to be charged overnight, all night.

LD150
User level: Level 10 (107,674 points)

Oct 31, 2026 5:49 AM in response to Jeff Donald

Jeff Donald wrote:
WhatsApp may be having an issue. The app has been updated 17 times in the last month. The most recent update was yesterday. Meta support recommends deleting the app from your iPhone, restarting your iPhone and then downloading and reinstalling a fresh copy from the Apple App Store. I would follow there advice and observe you overall battery performance over the next 7 days. Good luck.

..ensuring they first backed up to iCloud within Whatsapp app settings.

Then restore on re-install.

I am hoping my granddaughter will uninstall and reinstall Whatsapp without backup, and free off 75GB of guff from her 128GB phone!

Originally posted at discussions.apple.com/thread/256386361