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Level 1

23 points

iPhone 13 battery percentage stuck, only updating value on reboots

My iPhone 13 Pro battery percentage indicator is stuck, and/or very slow to decrease, not following real battery percentage.

Actual battery status is only updated on reboots of the phone. So for example if I reboot after some hours of using the phone the battery will go from like 85% to 60%, because the iPhone couldn't correctly track the battery depletion in the meantime. This is confirmed by briefly connecting the phone on a Mac with Coconut Battery, the reading on phone is higher and way off than the real charge.

A "restore as a new phone" didn't fix it. A restore in DFU mode didn't fix it either, as it didn't charging to 100%. Using iOS 15.0.1. The problem is widespread also on the base and max models, there are multiple reports also on new devices, even if on mine it seemingly started after an hard reboot.

Any chance to fix this?

iPhone 13 Pro

Posted on Oct 5, 2021 10:24 AM

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thingo Author

Level 1

23 points

Posted on Oct 6, 2021 1:13 PM

Update. It was probably nothing. Apple keeps a 5% gap between actual battery charge and displayed battery percentage after a recharge session, so this, coupled with the big batteries of the 13 series, can give the impression of a "stuck" battery. The actual battery percentage is restored at each reboot too, and this explains big drops of battery on reboot.

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iPhone 13 battery percentage stuck, only updating value on reboots

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