3 ms·

Interesting, I don't find the body battery very accurate. I had high hopes for it.

• muzani 5y ago
  In my experience, it tells you how you're physically feeling, not mentally. I don't need a watch to tell me how I'm mentally feeling. Sometimes I feel like I need more sleep, and it shows me I'm at 100. So that's a good sign that I already had enough sleep and need to start moving. Often when I'm very low on energy, I'm too tired to sleep. But there's a burst of energy, the kind you see in tired kids late at night. So the watch would say energy level is at 11 or so and I'd turn off the phone and close my eyes. But when you're tired, often the last thing you want to do is rest.