NotchMindBattery health
Open System Settings → Battery and click the ⓘ next to Battery Health. It shows the condition (Normal or Service Recommended) and, on recent macOS, the Maximum Capacity as a percentage of new.
Cycle count
Hold ⌥, choose → System Information, then Power. Cycle Count shows how many full charge cycles the battery has done. Apple rates MacBook batteries for 1,000 cycles.
Help it last
- Keep Optimized Battery Charging on in the Battery Health panel; it waits to finish charging past 80% until you need it.
- Avoid leaving the MacBook in heat, such as a hot car.
- Keep macOS up to date.
Know when to unplug
NotchMind, which I make, can tell you when the battery reaches the level you choose, such as 80%, and warn you when it’s low. See battery alerts in the notch.