What does rdo batt mean on fuse box?

The term "RDO Batt" on a fuse box typically refers to a fuse or circuit related to the "Radio Battery" or "Radio Power" circuit. This circuit is usually responsible for supplying power to the radio or audio system in a vehicle when the ignition is off. If the fuse for this circuit is blown, it may result in the radio not working properly or losing settings when the vehicle is turned off. Always consult your vehicle's manual for specific details related to your model.