Check the condition of your Mac laptop’s battery
You can check whether the battery in your Mac laptop is functioning normally.
To view your battery’s condition, choose Apple menu 
in the sidebar. (You may need to scroll down.)
Look at Battery Health on the right. You may see any of the following conditions:
Normal: The battery is functioning normally.
Service recommended: The battery is performing normally, but its ability to hold a charge is less than when it was new. You may want to consider replacing the battery.
Note: The battery may also not be functioning normally, and you may or may not notice a change in its behavior or the amount of charge it holds. Contact Apple or an Apple Authorized Service Provider for service. Repairs performed by untrained individuals or using non-genuine Apple parts may affect the safety and functionality of the device. See Find out how to service or repair your Mac. You can continue to use your battery before it’s checked without harming your computer.
To change battery health settings, click the Info button 
next to your battery’s condition. See the Apple Support article About battery health management in Mac laptops.