Sansa c200 Series Battery Replacement Kit can be used to easily replace the battery for the Sansa c200 Series MP3 Players. The battery kit provides everything needed to easily open Sansa c200 MP3 Player, replace the battery, and close securely. The battery replacement kit comes with a rechargeable Lithium Ion Battery, screw driver, and four back plate screws. The Lithium Ion Battery provides 20 hours of playback time and is certified and designed for the Sansa c200 Series MP3 player. Sansa c200 Series Battery Replacement Kit is guaranteed for best performance.