Hi Andy,
I was hoping you would see this. I have not purchased yet. A review of the manuals for the available unit, SPMA95871 states 4.1 to 5.5 volts as the upper limit. Oops they are still using The old manual on the website for the new unit. The advertisement shows a higher limit.
Thanks Andy, I will be ordering the latest one from my local hobby shop this afternoon. One lost sailplane is enough and a gps unit is cheap insurance.
Jerry