iLuv Silicone Case with Built-In Battery for 30 GB iPod classic 5G (Black) Built-in high capacity rechargeable lithium polymer battery more than doubles the playback time of your iPod - up to 42 hours Syncs your iPod to iTunes without taking iLuv silicone skin off Included USB power adapter gives you an ability to charge your iPod anywhere without a laptop or computer iLuv silicone skins provide your iPod with maximum protection against scratches and scrapes You can still control Click Wheel and Hold switch of your iPod with iLuv silicone skin