Optimized Battery charging is not working..

1️⃣ Check If It's Enabled

• Go to Settings → Battery → Battery Health & Charging
• Make sure Optimized Battery Charging is turned ON.

2️⃣ Reset Charging Habits

• This feature learns your charging patterns, so if habits changed after the update, it might take a few days to adjust.
• Try charging at the same time every day to help it relearn.

3️⃣ Enable Location Services for Charging Optimization

• Go to Settings → Privacy & Security → Location Services
• Scroll down to System Services → Turn ON System Customization & Significant Locations
• This helps the iPhone recognize familiar charging locations.

4️⃣ Restart & Reset Settings

• Restart the iPhone (press and hold Power + Volume Up → Slide to power off).
• If the issue persists, try Reset All Settings:
  • Go to Settings → General → Transfer or Reset iPhone → Reset → Reset All Settings
  • This won’t delete data but resets system settings.

5️⃣ Check for Bugs or Background Activity

• If the update caused a bug, try a clean install via DFU restore (advanced step).
• Monitor if an app is draining battery (Settings → Battery → Battery Usage by App).

6️⃣ Wait for iOS to Adjust

• After updates, iOS sometimes needs a few charging cycles to recalibrate battery management.

If the issue persists, your friend can report it to Apple Support and check for any upcoming iOS fixes.

The battery will still charge to 100% occasionally according to Apple's documentation. The only real question is how often occasionally might be.

Optimised Battery Charging is designed to reduce the wear on your battery and improve its lifespan by reducing the time your iPhone spends fully charged. It is ...

About Charge Limit and Optimised Battery Charging on ...

Did you see my reply?

Optimized Battery charging is not working… - Apple Community

My opinion.....Charge Limits are more of a gimmick than anything else, but that might be another discussion.