Hi,
I never turn my watch off and sometimes I have it to show seconds and sometimes only minutes. Sometimes I have it connected to my phone and sometimes I don't. I have the data recording set to every second and I have not turned off any of the sensors. I check stuff like temperature, pressure and altitude pretty often. I don't use the GPS often, but sometimes I do. After two weeks, my watch still showed two of five on the battery indicator. I just wanted to share my experience of the battery.