Yes that is quite noticeable. Initially you're playing around with the settings for the watch and each time you launch the watch app on the phone you'll notice the Bluetooth icon flash a bit showing that it is connecting to the watch so both the phone and watch will drain a little.Not mine. My phone is coming home with 10-15% more power left at the end of the day. I believe the backlight to the iPhone uses more power than any other part of the phone and the watch is, without a doubt, replacing me pulling out my phone many times a day.
I used to get nearly two days battery life with my iPhone 6 Plus. Even after getting the Watch the battery life was really good.Is anyone else experience that the iPhone's battery is draining faster with the watch? I have only had mine for a day but so far it looks like the battery is running emoty faster than before I had my watch.