To improve the battery life:
1. From you iPhones' settings
2. Choose "Privacy"
3. Select "Diagnostic & Usage"
4. Then select "Don't Send"
5. Enjoy even greater battery life than before.
Better Battery Life on Watch OS 2
Tested :-) this works! amazing.
Hmm, my choices are greyed out and set to Don't Send but my battery is still used up quite quickly.
Try re-starting both your iphone and watch @snackdog. Has this worked for anyone elses? Reply to this thread for any of you that have tested this.
Works again thanks