I waited until I got my duo whilst my Steel was on a 2 day battery cycle. As soon as I got the watch it dropped to 16 hours. I finally replaced the battery, to find that I really needed a new zebra strip, too. 12 days later I got a new strip and my Steel is running for 7 days again. I use Mpebble for now, as to my knowledge Cobble doesn't support many 3rd party apps like Tasker yet (I haven't tried in a couple of weeks)