MacBooks use lithium batteries

Learn about battery health management in Mac notebooks

The Battery Health Management feature in macOS 10.15.5 is designed to extend the life of your battery by reducing the rate at which it chemically ages. For this purpose, the function monitors the temperature profile and the charging cycles of the battery.

Based on the recorded measurements, the battery health management can reduce the maximum charge of a battery in this mode. This is done as needed to ensure that your battery is charged to a level that is optimized for your use, thereby reducing the battery's wear and tear and slowing its chemical aging. The battery status management also uses the measurements to calculate when the battery needs to be serviced.

While battery health management benefits the long-term life of your battery, it can also reduce the time your Mac runs on a single charge when capacity limits apply. If it's most important to you that your Mac notebook lasts as long as possible before charging, you can turn this feature off.

When battery health management is activated, the maximum charge capacity of your battery may be limited. Although this function is actually intended to improve the life of a battery, it can cause the battery status menu to report a need for maintenance. Your Mac uses the continuously activated battery health management system to calculate when it is recommended to service the battery.