The Apple Watch Series 6 is rated for 7 hours of battery usage while recording an activity with GPS. That's right at the edge of some hikes I've done, and it would leave a multi-day hike out of the question.
Compare to Garmin: The Fenix 6 is rated for 36 hours of GPS activity recording per charge, or 72 hours in a battery-saving GPS mode.
Compare to Garmin: The Fenix 6 is rated for 36 hours of GPS activity recording per charge, or 72 hours in a battery-saving GPS mode.