The iPhone is not charging full

This is possible due to Optimized Battery Charging set to ON on your iPhone. 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. Your iPhone uses on-device machine learning to learn your daily charging routine so that Optimized Battery Charging activates only when your iPhone predicts it will be connected to a charger for an extended period of time. The algorithm aims to ensure that your iPhone is still fully charged when unplugged.

Click here ➔ To Learn more about Optimized Battery Charging.

Axel F.

If your device is running iOS 13 or later please see this Apple support document:

About Optimized Battery Charging on your iPhone