S4 44mm - I'm getting a big reduction in remaining battery. So normally I start at 100% at 7am and end my day of normal usage at 11pm (two days worth of data, by end of day 2 I charge my watch). And when I say normal usage, I do not play music directly off the device, I respond to text messages via audio converted to text or emoji's, health tracking is enabled including a daily ECG (1 at lunch). And I use the modular compact face with weather/calendar/activity monitoring. And finally, the new Noise dB is enabled and running in the background for quick checks (if needed, I might check this app once a day, at most two). So after all that I would see around 60 to 65% battery left at the end of day 1, sleep with my watch on (theater mode goes into effect) and wake up with around 50% remaining which would last me for day 2 before charging.. this is not the case with OS6. I'm seeing at best 50% by bedtime (11pm), theater mode goes into effect, wake up I'm around 25 to 30%. At that rate, I would not make it through the day so I take my watch off and charge it while I get ready for my day, bringing it back to around 70% or so.. again I know at 50% remaining I can get through the day. So the biggest loss of battery power is nonactive time, which simply should not be the case.. but.. it's beta and active monitoring is running so that does bring down the device. They'll end up doing their usual tweaks and by the end should be back to where they usually are. Sorry.. this is probably way overkill. Apple Watch is by far my fave Apple product.