I normally don't keep bluetooth on but a few weeks ago the Fitbit prompted me to turn it on so I obliged. Ever since then, I noticed my battery was draining much faster where I would have around 15-20% battery at the end of the day vs. 30% vs. 40%. I am surprised at this as its supposedly low energy and feel that its not supposed to drain that much battery. I am coming from a few android phones where bluetooth battery usage was negligible. Has anyone had a similar usage?