I got a 6S Plus this weekend. Did a transfer of the old 6, repaired the watch, etc. I made no changes to apps, didn't do anything new with the Watch of phone, is essentially identical to the 6. Now I am noticing that my watch is draining very fast. Usually I go to bed and it's around 50% charged. Now, I am at lunch at at 45%, and have been hitting 10% by 5-6 pm. It's not just my imagination, I have really lost about half my battery time. Has anyone else experienced this? No idea where to start looking. I do keep a charger in my backpack for daytime charging. But it would be great to know a cause.