Radioddity Extended manual for Radioddity DB25-D, DB40-D & GD-88 v3.0
© Radioddity 2023 page 33 of 252
5.2.3 Radioddity DB40-D power supply options
5.2.3.1 Mobile Operation
The vehicle battery must have a nominal rating of 12 V. Never connect the
Radioddity DB40-D to a 24V battery. Be sure to use a 12 V vehicle battery that
delivers sufficient current. If the current to the DB40-D is insufficient the display
may darken during transmission or transmitting output power may drop
excessively.
Notes: If the car battery is not fully charged or when the engine is switched off but
the battery is still not fully charged, the battery may discharge and there will
not be enough power to start the car. Please avoid using the radio in such
situations.
1. Route the DC power cable supplied with the Radioddity DB40-D directly to the
vehicle's battery terminals using the shortest path from the transceiver. The
entire length of the cable must be dressed so it is isolated from heat, moisture,
and the engine secondary (high voltage) ignition system/cables. If you use a
noise filter, the metal parts of the car shall be fitted with an insulator to prevent
it from touching the car. DO not route the power cord in parallel with the
antenna cable.
2. After installing the DC power cable, in order to avoid the risk of damp, please
use heat-resistant tape to tie together with the fuse box. Do not forget to
reinforce the whole cable.
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