Solved: Charge 2 not tracking sleep stages - Fitbit Community
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Recorded on a Charge 2. Analysis of sleep? Is it normal to be awake for 15 mins after my first sleep phase and awake for 27 mins before the rem cycle? : r/fitbit
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Amazon.com: Fitbit Charge 2 Heart Rate + Fitness Wristband, Black, Large (US Version), 1 Count : Sports & Outdoors
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Full article: A validation study of Fitbit Charge 2™ compared with polysomnography in adults
