I find that integrating it into my routine made my current watch (SE1) battery a non-issue. I wear it starting in the morning, charge it on the way to work, and

I find that integrating it into my routine made my current watch (SE1) battery a non-issue. I wear it starting in the morning, charge it on the way to work, and then to bed. Repeat ad infinitum. Battery usage at night is way lower in my experience, and it usually survives til morning or close to it.