Some versions of the Backcountry Access Tracker 2 have a firmware bug that causes them to go into a programming mode in certain circumstances.
Being a software engineer, I understand all to well problems with writing software and getting it tested. I am concerned however that there is no way to do a field update on this firmware as there is with many other consumer devices.
Advice to beacon makers; plan for the existence of bugs, and the need to update the firmware on fleets of avalanche beacons.
How to test weather your tracker needs the upgrade:
To determine if you already have version 4 software, disconnect and reconnect one battery while the unit is off. After displaying “t2,” the unit will then display the software version. If the display reads “r04,” then you have the most recent software.