I just want to bounce this off some other Hero users and hopefully verify that i'm on the right page here. A month or so back I started running mine with GPS toggled ON all the time. (For apps to find a lost Hero it seemed the only effective way to find it was if GPS was on). GPS is not powered (or maybe very low powered?) UNLESS the GPS Symbol is showing at top of screen? I've noticed NO difference in battery life with GPS toggled ON vs OFF over the last month. GPS (when toggled ON) appears to be actually turned on or off by particular Apps that use it. Anyone? Am I correct?? It seems to be "common knowledge" and I think Android even says to toggle it OFF to save battery life but this seems to be not true? I DO have an App that does turn GPS on but does NOT turn it off when I exit, which does drain the battery until I manually correct, which could be a problem, but I do see the GPS icon so I know it's on and draining.