Good suggestions menion! I do have a bluetooth GPS but I don't want to carry it. I have 3 batteries :-)
But setting time beween GPS points sound like an obvious way to get a little more juice from the batteries. And since it is in walking speed, that should not be a problem at all.
But setting time beween GPS points sound like an obvious way to get a little more juice from the batteries. And since it is in walking speed, that should not be a problem at all.