Battery Life
Not as good as I would have hoped. At 2:49PM today I decided to test the Battery Life of the S2. I cranked the display brightness all the way to 11 (ok, actually to 10) and had notifications on 150 apps. I didn't run it like I normally would though, since this is the first day with a new toy, there was lots of playing around (more than I would normally). 7 hours later at 9:45PM, my battery hit 50%. At this rate, I will go through a full charge in 14 hours.
Assuming I change the brightness to 7/10, maybe I will get another 30%? So from 14 hours to 18 hours. And if I cut back on the play time with the watch, maybe another 2 hours, so 20 hours. Still way short of 2-3 days, but I am sure this will even out later.
I did have ambient mode on, so I guess that matters. Tomorrow morning I will test with Ambient Off and Brightness at 7/10 and go from there.
Quick Charge
While the watch comes with a 5v .7A Charger, I decided to plug in the Wireless Charger to my Samsung Rapid Charger. After 15 minutes I am up from 50% to 60%. So at this rate from 0% to 100% should take 1 hour and 40 minutes. I'm ok with this as it is a Wireless Charger and not a cradle dock with a direct connection. This was with the S2 powered off. I assume with the S2 powered on it will take longer, so maybe 2 hours for a complete charge.