iPhone battery charging to 100% multiple times from 20%

Hello, I have a question. I think there is a problem with my iPhone. I set my phone's battery to 80%, but for some reason, I plug it in at 20% and it charges to 100% several times.Why do you think this happens?


[Re-Titled by Moderator]

Original Title: Battery level

iPhone 11, iOS 18

Posted on Aug 18, 2025 9:55 PM

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Question marked as Top-ranking reply

Posted on Aug 18, 2025 10:04 PM

The feature doesn't engage when your charging habits are more variable, when you travel, or if you charge for short periods of time. Because of this, some location settings must be enabled for Optimized Battery Charging to activate. None of the location information used for this feature is sent to Apple.

  1. Go to Settings > Privacy & Security > Location Services and turn on Location Services.
  2. Go to Settings > Privacy & Security > Location Services > System Services and turn on System Customization.
  3. Go to Settings > Privacy & Security > Location Services > System Services > Significant Locations and turn on Significant Locations.


Know it here --> Learn what to do if Optimized Battery Charging doesn't activate.


1 reply
Question marked as Top-ranking reply

Aug 18, 2025 10:04 PM in response to Judaleas

The feature doesn't engage when your charging habits are more variable, when you travel, or if you charge for short periods of time. Because of this, some location settings must be enabled for Optimized Battery Charging to activate. None of the location information used for this feature is sent to Apple.

  1. Go to Settings > Privacy & Security > Location Services and turn on Location Services.
  2. Go to Settings > Privacy & Security > Location Services > System Services and turn on System Customization.
  3. Go to Settings > Privacy & Security > Location Services > System Services > Significant Locations and turn on Significant Locations.


Know it here --> Learn what to do if Optimized Battery Charging doesn't activate.


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iPhone battery charging to 100% multiple times from 20%

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