I had a similar problem with my TAB S2 T713 where Bluetooth would cause the battery to drain rapidly after the Nougat update. A couple of days ago I found I could work around this by entering Flight Mode and then re-enabling Bluetooth and WiFi. After doing this the battery drain seems back to normal. I have no idea why you should be able to keep Flight Mode turned on whilst using the radio systems - but it seems to work!
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