So, I'm just curious as to why the GPS location services suck so much battery? My Garmin etrex vista takes two AA batteries, and has stayed running for a full day of hiking, plus the next day, and the day after that. That was something like 22 hours of constant usage. Even on the box of my Garmin it has listed somewhere around 20 some odd hours of battery life. So, if my garmin can stay connected to GPS satellites for that long, why can't my phone?