According to 9to5Mac, the iPhone 15’s settings now allow you to choose between 85%, 90%, and 95% battery levels. Previously, only 80% was available.
iOS 18 will also start to warn you if your iPhone is connected to a slow charger. The notification will appear in the “Battery” section of the smartphone’s “Settings”. The charging graph will appear in orange and a text will appear on the graph to warn you that slow charging is being used: “Slow charger.”
However, it is not specified which power of the charger will affect the warning output.
Source: Ferra

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