You can preserve energy on your Apple Watch by way of robotically disabling each its cell capacity (if it has such) and its heart-rate sensor during a exercise. Your Apple Watch will nonetheless calculate energetic energy, distance, tempo, and elapsed time. To flip on Power Saving Mode:
- On your iPhone, open the Apple Watch app, then faucet the My Watch tab.
- Tap Workout > Power Saving Mode.
(This how-to is primarily based on my reviews and information on Apple’s reinforce pages — the place the photographs occasionally come from.)