I have a 42mm Series 0 that I've had since just after release. When I first got it the battery lasted all day long without issue and still had 50% ish when I went to bed of an evening.
With the later updates that dropped a little, but generally, it could walk through a day without any concerns.
Today I'm down to <10% and in powersave mode at 3:30pm after putting it on about 7am. This is only the second time it's done this and I'm wondering why given today has been very light usage with only one message, no meeting alerts and nothing... hell I haven't even left the office today so it's barely even steps!
The watch has been sitting on the charging dock since I took it off last Friday, so four days. This morning when I put it on I don't remember checking the charge level, but since it was on the dock in nightstand mode I am pretty confident it was (or should have been) fully charged. The other thing I noticed is that it was pretty warm. Not hot, but warm enough that I noticed it being warm.
Thinking back to the last (and only) time it's done this sort of thing before, I do think it was after a long weekend of not using the watch. I figured it might be app related last time so deleted a bunch of apps that I didn't use on the watch to be sure and it's been fine ever since.
Now I don't usually notice it being warm and normally it's used every day... So the question is, is there an issue where leaving it on charge for a few days kills the battery in some way? (for only that cycle.... like maybe it stops charging at some point then some bug causes it to fail to maintain the charge so it slowly drains even though it's on the charger??)
Has anyone else noticed anything like this?