I picked up a new apple watch sport 42mm a few days ago. This is my second apple watch. The first was destroyed a few months ago and I finally got around to picking up a new one. It seems that the battery life is terrible. I have IOS10 Beta 2 installed on my iPhone 6 plus and am running watchOS 2.2.1. I do not have any third party apps installed. My brightness and haptic feedback are both on the lowest setting. Silent mode is turn on. I am using the Modular watch face. Last night I turned the watch off/on then unpaired/repaired the watch as a new watch. I only have messages being forwarded to my watch right now. Yesterday I put the watch on at 7:30am and it died at 6:30pm with what I felt was very minimal usage. This morning I put the watch on at 7:30 and right now 10:10am I am at 79%. Not sure if this is normal but I feel like my last watch would last all day with 10-30%.