We have the AT&T 4g and man, we don't even get 9 hours on ours. Husband left around 7 on a full charge at 8 he was at 60% then usually around lunch it dies. (bluetooth off, watch face off, hrm off, etc) I haven't used mine out of the house yet as i've been injured but I unplug it when it's at 100% and just leave it on the charger and it's dead within the end of the day too, and that's not using it at all. We're thinking about returning

We're pretty bummed, we love the watches when they actually work... But it missing notifications, numbersync not working, battery lasting a few hours just doesn't seem worth it. We may try to exchange first to see if they're defected, but since it's both of our watches, that's highly doubtful. Maybe exchange for the gear s? eh, idk. We're just so disappointed.