Quote:
Originally Posted by oilers_fan
I don't think you have to, but they recommend it because they say it averages 30% of the battery power over night, but could be more. So I think the only problem is your phone running out of juice, and thus not waking you up. Just fully charge it, use the app, and set a backup alarm just in case.
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I think it uses more than that. Mine was at 50% before I went to bed and it died before I woke up, so now I always have it connected to the charger.