Started off this AM with 100% green on an AT&T Gear S (Naked - no SIM) @ 6:30AM. One 5 mile run (not using any app on S, just pedometer) and by 1:00 PM zero battery. Was connected via BT all day but other than that very little use. This is less than half that I get with my G2. Have a Verizon w/Plan S arriving tomorrow and hope to see better battery life.