I'm going on a camping trip this weekend and would like to use my Apple Watch Sport as long as possible. I'll have my phone off to conserve battery for emergency situations, and I don't care about receiving any phone notifications on my watch. I only want to use my watch to tell time and to use for the exercising features since I'll be hiking. With that in mind, how can I configure my devices to maximize battery life? I know I can disconnect my phone from the watch by simply turning it off, moving it out of range, or turning off the Bluetooth on my phone. However, I fear that the watch will still be expending valuable battery life as it uses its own Bluetooth to seek out a connection with a phone. Is there a way to switch off the Bluetooth on my watch? Any other suggestions to maximize battery life on my watch while still having all the activity/exercise apps continue monitoring?