A system and method for classifying video content into a plurality of video content categories; and adaptively generating video encoding profiles for the video content based on, at least, the plurality of video content categories. The end closure comprises a contoured neck feature configured for increased strength and alignment with a user’s lips. The power supply to the busbars is switched from the primary source to the backup source in the event of any of the above-mentioned magnitudes departing from the range of permissible values for these magnitudes.