I have 2 asset trackers sitting here.
Both have a GPS fix. GPS shield red LED is off.
Tracker-A’s Electron board’s red LED is flickering continually.
Tracker-B’s is sold.
Both have same firmware.
Neither has battery.
Each Electron is outputting debug messages to USB serial ok.
When I plug battery into Tracker-A, flickering red LED turns off.
When I remove battery, flickering starts.