It really is an issue for me when it comes to anything fitness-related. Recording exercises drains it fast, and I am willing to bet that the GPS is the same sto

It really is an issue for me when it comes to anything fitness-related. Recording exercises drains it fast, and I am willing to bet that the GPS is the same story as heart rate -- it will probably sample every 5 minutes or so when you're not exercising and then bump up the frequency when you are. Which means it still can't be used to capture anything over a couple hours.