Apple Watch 4 drains battery significantly on iPhone 6s

I have an update- I was thinking and the only other thing that I changed on my iPhone since getting my watch is that I enabled bluetooth since it's required to setup the watch (before I had my Apple watch I had bluetooth disabled since I didn't need bluetooth). So, I decided to turn off bluetooth and then fully charge my watch and my iPhone (this was earlier today). Now after about 8 hours, I can confirm that turning off bluetooth fixed my battery drain issue. Have a look at the screenshot below, the red arrow is how quickly my iPhone battery was getting drained with bluetooth turned on and the blue arrow is the minimal "drain" with bluetooth turned off. Note: my watch works perfectly with bluetooth disabled, it still works normally and receives all messages, calls, etc. Both my watch and my iPhone are connected to WiFi and both work perfectly (so far) without bluetooth. So I think I'm going to just leave bluetooth disabled since it's really only needed to initially setup the watch and I can easily re-enable bluetooth if I need to use the Apple Watch app to tweak something. So, my iPhone battery is back to "normal" and interestingly, my Apple Watch battery seems to be much better now too (has gone from 100% to 74% after 8 hours, which is better performance than normal). :-)

Hi, thanks for the suggestion - I did check that already and the apps listed by battery usage (24-hour and 10-day view) are similar to how they have always been (I check this randomly about once a month just for fun). Here's my current battery usage by app (10-day view since the issue has been going on for at least a week):

News - 18% (the app I use the most)

Phone - 12% (varies based on calls)

Messages - 9%

(a few other apps listed here between Messages and Apple Watch, but all are normal)

Apple Watch App - 3%

Also, I only used the Watch App (on my iPhone) to initially setup the watch... I maybe used it for about 30 minutes. I haven't used it since except to slightly tweak my watch faces. Since (in my opinion) the Watch App is only useful to setup/configure the watch, I don't expect to use it very much at all.

Anyway, I'll keep an eye on the battery usage info... but so far nothing is different here and Apple Watch is currently near the bottom of the list at only 3%.

Another person suggested that I should reset my watch, so I'm going to do that to see if it makes a difference.

Thanks!

Hi, thanks for the idea - I will do a reset to see if that helps. I'll probably know in a day or two if it fixes the issue.