Powerstream - Gumstick Prismatic 1.2V 1400mAh Battery (NH-14WM NH-10WM HF-AZ01T) for Portable CD / MD / MP3 Player Made for portable equipment such as MP3 / MD/ CD players, medical devices,etc. Ni-Mh; Capacity: 1400mAh; Voltage: 1.2V Rechargeable up to 1000 times. Read description below for supported models. Inquire if you are uncertain