Sadly my 3.0 and 3.1 experience with original watch is very different. Have unpaired, repaired, reset, restarted but still battery drops life a stone after a workout has run. Have removed all but the one face, background refresh off, handoff off. Genius Bar went through diagnostics and reported all ok. Have a worry that it could be my iPhone 7 causing the problem as the few days with 3.0 on old iPhone 6 I didn't notice the drain. Next step is to send it back to apple to have a look but would rather not although having a battery not lasting a day with even just a 30 min workout session isn't much use. Any other suggestions gratefully received.