Keep your MacBook battery between 20% and 80% for storage.

Yes, that’s the golden rule for long-term health. Lithium-ion batteries degrade fastest when fully charged or fully drained for extended periods.

If you’re using your Air plugged in most of the time, macOS has “Optimized Battery Charging” built in — it learns your schedule and holds at 80% until you need it. That’s good, but not perfect. For true control, apps like AlDente let you set a hard charge limit.

For storage (more than a few weeks), shut it down at around 50% charge in a cool, dry place. Heat is the enemy. Don’t store it fully charged or dead.

On a daily basis, just use it normally. The software handles most of the work now. Don’t obsess over babying it — just avoid extremes.

Future you will appreciate that you didn’t leave it tethered to the charger 24/7 for three years.