To disconnect iPod nano: 1 Unplug the headphones if they’re attached.
2 Squeeze both sides of the Dock connector to disconnect the cable from iPod nano.
To remove the connector from your iPod nano, squeeze the buttons on the sides and pull.
About the iPod nano Battery iPod nano has an internal, non-user-replaceable battery. For best results, the first time you use iPod nano, let it charge for about three hours or until the battery icon in the top-right corner of the iPod nano display shows that the battery is fully charged. If iPod nano isn’t used for a while, the battery might need to be charged.
The iPod nano battery is 80-percent charged in about two hours and fully charged in about three hours. If you charge iPod nano while downloading files, playing music, or viewing a slideshow, it might take longer.
iPod nano Basics