Garmin GDL 39 User Manual page 37

The battery assembly may be charged independently of the GDL 39. Connect
power/data cable to connector in the battery assembly. An orange LED next to the
power port on the battery assembly will be lighted while it is charging. The LED
will extinguish when charging is complete.
Power Connection
Figure 3-13 Separate GDL 39 Battery Assembly Charging
190-11110-00 Rev. G
GDL 39 Battery
Assembly
Orange Charging LED
Garmin GDL 39 Portable ADS-B and GPS Receiver User's Guide
Connection To GDL 39
3-19