So my Apple watch has been having battery life problems lately. I took it off the charger at 7 am and it died by 5pm. No workouts or anything. I put it in airplane mode today and after 1 hour it had dropped 10%. It's running watchos 3. My iPhone is on 10.1 pubic beta 2. Week before last it had no problem getting through the whole day and then some. Thoughts?