I don't know what kind of magic Apple put into the s2 combined with watchOS 3.1b1, but my battery is AWESOME!!!
I charged the watch before bed to 100%. Went to bed at 10pm, put it in DnD and started Sleep Pulse 2. Woke up at 4:10am, stopped Sleep Pulse and turned off DnD. Went to the gym and tracked my workout for an hour. Came home and showered with the watch on so I could play with the water ejecting speaker, then headed off to work. It is now 4:00pm and my battery is at 78%. I have been texting and checking notifications all day long. Normally I would be right around 50% by now.
Very impressed and this is just the first beta
