I had a watch series 3 LTE (LTE not activated) and recently switched to a Watch series 4 GPS. The Series 3 would do between 2 and 3 days regularly. I once monitored it carefully and it went from 100% to 8% in 70 hrs, just short of 3 days, ie an average of about 1.3% per hr. My Series 4 drops from 100% to 50% in 24 hrs, ie average about 2% per hr. I know these are well in excess of the spec number of 18 hours, but I was not expecting the Series 4 to be so much worse than the Series 3. I have crawled through settings looking for something on my S4 which could explain this. At first there was the 'new device' factor where I was setting it up and exploring faces etc, but I am past that stage. Any comment or advice? Thanks --- Post Merged, Jan 28, 2019 --- Just found this article and thread which seems to explain things. BUT currently my Usage/Battery is showing: Usage: 7 hrs 48 mins Standby: 9 hrs 46 mins This doesn't look right....what could be "using" battery 80% of the time?