HQRP Replacement Battery for Sandisk Sansa C200 C240 C250 MP3 Player plus Universal Screen Protector HQRP Replacement MP3 Player Battery plus HQRP Universal Screen Protector; Battery Type: Rechargeable Li-Polymer Battery; Capacity: 550mAh; 100% compatible with original battery and charger devices; No memory effect, the battery can be recharged without loss of capacity; 200 days warranty.