The AT500 has a battery compartment within the head and has a batter indicator display on the side. From within the interface you can double click on the beam status light to get the current battery status for the unit. There are also indicator lights regarding the WIFI status.
The B-probe must be setup and calibrated within Tracker Pilot. Once defined on the controller a new target with the B-probe serial number will become available within the Reflectors and Targets database. To measure with the B-probe in SA. Add a target from the manufacturer definition section and set it as the active target in SA.