Part of macOS
powerdPower and battery
○ Leave it
Manages sleep, battery and charging.
What it is
Decides when the Mac sleeps, and looks after the battery.
If you stop it
macOS starts it again straight away. Leave it.
The verdict
○ Leave it. Part of macOS, or something that starts again by itself. You never need to close these.
In Activity Monitor
powerdPowerUIAgentpeakpowermanagerdpowerdatadPerfPowerServices
From Procession’s guide, in the words the app shows.