(08-02-2012, 07:15 PM)Sleepster Wrote: The PRS1 runs on the same 12 volts as the car, so the adapter doesn't have to do any voltage conversion. You can just hook one up directly to a 12 volt battery and you're good to go when in a pinch.
Yes, that is the feature that I liked about the PR. I just wish it did not keep me up. The car adapter for the S9 cost me over $100 out of pocket while the PR's would have cost about $6. Either way it provides a way to power the unit if we have a power failure as well as for travel.