With all respect to the original poster and those who may have "battery life as deal breaker" thoughts about Apple Watch, I think the issue is overblown. Not non-existent, but overblown.
Let me explain.
In the days of flip phones, your old Sony Ericsson whatever or Nokia 61XX would last a week on a charge. Those phones didn't do much, they were relative bricks and they lasted forever. You could drop them down the stairs or leave them on the roof of the car and drive away and they were mostly fine.
Today's phones are delicate. You have to top them off before an evening out and if they slip from your hands on the train, you might have to hit up AppleCare. Of course, our iPhones are amazing, life-changing devices... The first thing many of us reach for in the morning and the last thing we touch at night.
To me, while watches haven't yet reached that must-have, iconic status, they're similar. My Apple Watch does so much more than any Timex. And here's the big part. Most of us don't sleep with a watch on. We put it down somewhere ? on a dresser or a nightstand, wherever. Isn't putting it down on its charger a natural and easy thing to do every night?
If my watch lasts through the day, I'm good. And it does. If you're traveling and have to bring another charger, I get that that can be a pain. Same if you work out and your watch doesn't last through a normal day. Possible deal breaker.
I look forward to others' take.