HQRP Battery for SONY NW-MS9 NW-MS11 TCM-80V WM-EX190 WM-EX615 WM-EX670 WM-EX672 MZ-R55 MZ-R90 MZ-R91 MZ-R900 MZ-R900PC MZ-R900DPC MZ-RH10 MZ-RH910 Portable CD/MD / MP3 Player + Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 1.2V; Capacity: 1450 mAh; Ni-Mh; Rechargeable up to 1000 times; Compatible with Original Battery; 200 Days warranty!