This 12 volt adaptor can only be used to power the Rino in the car, it does not charge the rechargable batteries, it is of little use, as I cannot carry my vehicle around with me in the woods when using my Rino. I have to have an alternate source of power to charge the Rino with the charger. Such as an inverter to charge while in camp for use the next day in the field.
Great Product the only adapter that will charge & operate the rino with its unique 4 pin conection be sure you have rechargeable nimh or ni-cad bateries. You can use the adapter with out batteries.
Suggestion - before you buy any accessories visit the Garmin website to make sure you are getting only those accessories that will work on the Rino series then return to Cabelas and order them.