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Jagooah Author

Level 1

45 points

80% Charge Limit no longer working

I have an iPhone 15 Pro running 17.0.2 and have set my battery charge limit to 80%.

For the first few days, it worked perfectly. Then, it started charging to 100%.

I understand from Apple’s support site that this can happen for calibration purposes. But it’s now been 5 days and the battery is ALWAYS charging to 100% whether I use a cable, an official MagSafe charger or a third-party wireless charger.

The behaviour started under iOS 17.0 but is the same under 17.0.2

How can I solve this.

iPhone 15 Pro, iOS 17

Posted on Oct 2, 2023 1:14 AM

Top-ranking reply

apple mad

Level 1

17 points

Posted on Feb 28, 2024 9:03 PM

FIXED. For some reason, it seems that once the phone does charge over 80%, whatever apple is using to sense the battery is breaching the 80% threshold stops working, so it needs resetting. To do this follow these instructions:-

Wait until the phone is well under 80% - say at least 70% or lower (trying to fix this when the charge is already over 80% doesn't work).
In settings, change the charging optimisation setting to "None"
Reboot your iphone
Plug your iPhone in to charge for say 10 seconds.
Unplug your iphone
Change the charging optimisation method back to "80% Limit"
Charge as usual

This fixed it for me. Points 4 and 5 may not be needed, but these are the steps I followed in an attempt to force the phone to look at a new way of monitoring the charge before I changed it back to 80% Limit, and it worked, so I guess all the steps might be needed for you too.

Good luck, and reply to let me know if it works for you!

Cheers,

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80% Charge Limit no longer working

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