Hi everyone, maybe its not the best solution, but I tried to take off the constant Heart Rate Monitoring every 10 minutes. The Battery life now is really really good. For Example: My 38mm Watch is now 5 hours off the charging cable and I am at 91% Battery. Yesterday after 13 hours, I was at 75% in the evening. With Heart Rate Monitor on, I was at 20-25% in the evening. For me this is no problem, because I was not very interested in the health part of the Apple Watch. What do you think?