About charging issues
I have an iPhone 12 Pro Max. Whenever I charge the phone 80% when the battery is charged. After that the phone does not charge. Please guide me. Thank you
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"With iOS 13 and later, Optimized Battery Charging is designed to reduce the wear on your battery and improve its lifespan by reducing the time your iPhone spends fully charged. When the feature is enabled, your iPhone will delay charging past 80% in certain situations. "
About Optimized Battery Charging on your iPhone - Apple Support