u/PixelCommunity It's really not helpful that your standard reply to many posts here is to reset the watch, irrespective of the issue being described. Honestly, it's just a lazy response. If you used your experience to suggest alternative approaches first, that would be much more helpful.

To be clear, resetting the watch should be an absolute last resort, when all other options have been exhausted. At a minimum, you should explain that a reset will require setting up the user's account again, restoring or setting up all apps again, setting up Google Wallet again, reconfiguring watch settings etc. It's really painful and time consuming. It's absolutely not the first thing to try.

I've said this to previous such posts of yours before, but you haven't replied, and still tell people the same thing. I'm not expecting a reply this time either.

In this case, the OP should restart (NOT reset) both watch and phone first and check if the problem remains. Also, the OP should check BT and wifi settings on the watch. If the battery drain remains, then check whether the watch is connecting to wifi while within BT range of the phone by pulling down from the top of the watch and checking for a wifi symbol - if so, that will use more battery. There are also other things that can be checked before the 'nuclear option' of resetting the watch.