In the data sheet listed on this website pin 2 is labelled as VBAT (backup battery) and pin 3 is labelled as VDC (DC Power).
An updated datasheet from http://www.usglobalsat.com/downloads/en … 2_v2.0.pdf
reverses these two connections with pin 2 as VDC and pin 3 as VBAT.
I have checked the current flowing through each of these when connected to a power supply. Pin 2 draws ~60mA, as set out in the specs. Pin3 only draws a tiny amount as would the backup battery.
Possibly to avoid confusion the new version of the data sheet could be uploaded onto this site.
Robert