iPhone 13 Pro Random Shutdown & Battery Percentage Fluctuation After iOS 18.3 Update

I am experiencing a critical issue with my iPhone 13 Pro after updating to iOS 18.3. My phone randomly shuts down without warning, and when I turn it back on, the battery percentage fluctuates significantly. For example:

  • Before shutdown: 60% battery
  • After turning back on: 10% battery
  • After another restart: 59% battery

This issue occurs multiple times a day, making my device unreliable. I have already tried the following troubleshooting steps:

✅ Restarted the device

✅ Checked Battery Health (still above 80%)

✅ Calibrated the battery

✅ Updated all apps and iOS

✅ Reset all settings

Despite these efforts, the problem persists. I would like guidance on resolving this issue. If it's a known bug with iOS 18.3, is there a patch or update planned?

Looking forward to your assistance. Thank you!

Device Details:

  • Model: iPhone 13 Pro
  • iOS Version: 18.3
  • Battery Health:76%

Best regards,

JEY

iPhone 13 Pro, iOS 18

Posted on Feb 5, 2025 03:31 AM

Reply
2 replies

Feb 5, 2025 04:30 AM in response to jey_jrtnm

What was the last iOS version where the battery percentage worked? Did it stop functioning after the iOS 18.3 update?


Some of the old posts:

  1. Hello, after I update to iOS 17, my battery percentage dropped to 2 percent, why?...
  2. After updating iPhone to iOS 16.4 my battery health dropped to 1 percent
  3. After updating to IOS 17 , my Iphone 14’s battery life dropped from 92 to 88 percent. Is anybody else having the same issue?...
  4. Battery drain after iOS 16.3.1. and also increase battery percentage without charging after restart or power off...
  5. Sudden drop in battery percentage on iPhone 14 Plus after iOS 17.3.1 update


Therefore, this suggests that certain device settings/usages need adjustment before attributing the issue to iOS.



It's not always the iOS update's fault!  Many things can cause phone problems.  If you tell people you think it's an iOS update, it might make it harder to fix or find a solution for the real issue.



Remember, the right question often leads to the solution!



Was/Is your device Jailbroken? If that's the situation, please be informed that attributing the issues to iOS updates may not be accurate.



iOS updates aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. The majority of the issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.


Kindly consider checking your settings and addressing any device issues before attributing the issue to external factors. This could be a pure coincidence that the iOS update affected the iPhone functions.


Before initiating a standard iOS update, it's advisable to create a backup. Have you completed this step? If yes, proceed with the restoration from the backup.



See what each update does: About iOS 18 Updates, About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...




Feb 5, 2025 04:38 AM in response to jey_jrtnm

At 76% battery health, it’s time to replace your battery. The behaviors such as restarts and battery capacity fluctuations are typical of batteries near the end of life (EOL). Apple can diagnose your iPhone remotely or you can make a Genius Bar appointment.


Genius Bar Reservation and Apple Support Options - Apple


Explore Service Locations


Official Apple Support

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iPhone 13 Pro Random Shutdown & Battery Percentage Fluctuation After iOS 18.3 Update

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