I have a launch day original Apple Watch (is that series 1? I see references to a series 0) that I've worn every day since I got it. Battery performance was never great, but lately I notice it's dead or close to it by 6pm (it comes off the charger at about 6:15am each morning). Is the battery performance in the series 2 significantly better? I'm kinda jonesing to switch to rose gold anyway, and figured it might be worth it if I can kill two birds with one stone. Anyone had both and can compare? Thanks!!