i am thinking about buying the Sportster 5 from Sirius. I got a GPS unit and I charge it through a cigarette lighter. So i am wondering how do the radios batteries get charged if I am going to mount it.

And can i have both a GPS and Satellite radio in the same car. the signals wont get mixed up with each other, will it?

can't answer the first question.

second question. yes, you can have both. no problems there.

Sportster 5 doesn't have a battery, so need to charge it anyway.

Using both at the same time with FM modulator isn't going to work very well. And you can't really use both at the same time unless one of them has an AUX IN.

can you not direct wire the sirius to the cigarette lighter and then also use the plug for the GPS?

I have a cigarette light "Y" to power my Sirius and my phone.

If you can, avoid the FM transmitter and wire it directly to your receiver using the Aux jack. I put a mini jack in my dash (connected to my Aux ports on the back of the receiver) so I can use it for Sirius or an iPod.

can you not direct wire the sirius to the cigarette lighter and then also use the plug for the GPS?

Sirius and XM radios are not 12V, so you need a power supply to step it down--usually to 5V. This is normally contained in the cigarette lighter adapater itself.

Sirius and XM radios are not 12V, so you need a power supply to step it down--usually to 5V. This is normally contained in the cigarette lighter adapater itself.

I don't know what radios you're looking at, but every one I've seen are 12v. :confused:My home kit comes with a 12v power adapter.

I don't know what radios you're looking at, but every one I've seen are 12v. :confused:My home kit comes with a 12v power adapter.

If they were, they wouldn't need an adapter (in the car anyway).

As for HOME, maybe a home dock is 12V, but the radios have all been 5V for a long while now (at least XM's have). It would make sense that those giant heat-laden, power-hungry chipsets Sirius use may still require it I guess...same reason you get 2 hours on a charge with a Stilleto I guess, huh?