HQRP Replacement Battery for Creative Zen Micro Photo BA20203R79909 MP3 Player , Li-Ion , Extra High Capacity plus HQRP Screen Protector 850mAh Extra High Capacity , 3.7v; for Creative MP3 Player is completely compatible with batteries of smaller capacity; HQRP Replacement Battery plus HQRP Screen Protector; Chemistry: Li-Ion; CE and SGS-ISO-9001-2000 Approved; No Memory Effect, The battery can be recharged without loss of capacity; 200 days warranty!