It kinda sounds like one of those "we're here to help you lines".
Battery Check
Apple suggests users import an album of average-length songs at 160 kilobits per second, place the album on a fully charged IPod, and leave the album playing using the repeat setting until battery power expires.
"IPod (with Dock Connector) should play the album for approximately eight hours, while the (older) IPod should play the album for approximately ten hours," the company says.
number nine, number nine, number nine.........well you get my drift.
edit..........my Ipod did this..........duplication, replication