[DG] [DG11] T121 Hull transmitter power

[Derek - Raymarine - Moderator]

Hi mikedefieslife

Thank you for your enquiry.

The rechargeable batteries inside the wireless displays are required even if the unit is externally powered. Basically the external 12v supply will recharge the batteries which then power the display. Depending on the use, the age and the number of charge cycles of the batteries, they may have ceased to cycle and to will no longer hold a charge, in which case - they will need to be replaced.

the part number for the Hull transmitter rechargeable batteries is TA119.
Regards
Derek