Just got the update to Nougat for my Galaxy Note 5. If I enable maximum power savings mode, it is not possible to disable with out restarting the device. I've tried from the home screen and from settings. The same appears to be true for emergency mode.
That's a great feature on the Note 5. It should disable automatically once it is charged to a certain battery percentage. Have you attempted to plug it in and see if it disables?
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