Local Ac Power Source Status; Backup Battery Status - Motorola MC4000 Quick Start Manual

Local AC Power Source Status

AC power source status indicates whether the sensor's USB connector
is receiving power from the adapter or other USB power source. If the
device isn't receiving power from the USB source, it means that local
AC power may be lost, and the sensor is running on its internal
battery.

Backup Battery Status

Backup battery status indicates whether the backup battery is
installed, and the current charge status as a percentage of full charge.
Note: when the battery icon is grey, you may see the message
"Battery Switch OFF" or "No Battery Installed".
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Power
No power
Green
Yellow
Red
Grey
greater than 50%
20 - 50%
less than 20%
Battery not
connected or not
present