Battery readings

Battistics reads the battery from macOS when the power state changes, with a slow refresh in between. Nothing is estimated that macOS does not report; a value macOS has not reported shows a dash.

Reading	What it means
Charge	The level macOS shows, in percent.
Health	What the battery holds when full today, against its design capacity.
Measured health	The same ratio from the full charge the battery measured most recently. It moves more from day to day.
Cycles	Full charges used so far, next to the number the battery was designed for.
Current charge	The charge in mAh right now.
Current maximum	What the battery holds when full today.
Original maximum	What it held when new.
Temperature	The battery’s own sensor, in Celsius, Fahrenheit or both.
Power	Watts flowing into (positive) or out of (negative) the battery.
Amperage and voltage	The raw current and voltage behind the power figure.
Time on battery	How long since the Mac was last unplugged.

Power flow

The Energy pane shows what comes in from the adapter, what the Mac uses and what the battery adds or takes. The readings come from different sensors and can lag each other by a few seconds.

Busiest apps

Energy also lists the apps using the most CPU, sampled only while the pane is open.