Looking to bring my series 3 watch on a 3 day trip. I'm looking to see what people think my battery life will be like with the following factors: I wont have cell phone service because my phone will be in airplane mode. I will not be tracking my workout, just wearing it normally. Watch will not have "raise to wake" turned on With that being said, would you expect the battery to easily last those 3 days? I AM bringing a battery bank but wanted to use that more for charging my phone if need be. Also, what would battery life be like IF I wanted to track the hike?