Issue Description
MacBook stops charging at 80% even when plugged in.
Common Causes
- Optimized Battery Charging
- Battery health management
- Heat conditions
Step-by-Step Solution
Step 1: Check Battery Health Settings
- System Settings → Battery → Battery Health
- Review Optimized Battery Charging
Step 2: Disable Optimized Charging (Temporarily)
- Toggle OFF
- Restart Mac
- Observe charging behavior
Step 3: Cool Down MacBook
- Disconnect charger
- Let Mac cool for 20–30 minutes
- Reconnect charger
Step 4: Check Battery Health
- If capacity is degraded, limit is expected behavior
Explore Further
- Use macOS battery graphs
Prevention & Best Practices
Optimized charging improves battery lifespan.