ok Oscar, Yes, the battery looks like a small kit-kat candy bar, with 2 small terminals close together at one end. I have 2 original batteries but they are dead. Have not yet recieved the new one. I saw one for sale on ebay from england. New old stock, no guarantees, cheap. I have a AA battery pack which thumbscrews onto the cassette unit. I don't recall if it works in conjunction with the factory batt or can go independant of the internal battery. I'll try to get a pic to you and attach to an e-mail, when I can, ok. Anyway, this player cost over $300.00 new, I recall. Good luck, maybe one day you can sell to me or I'll sell to you my whole setup. I need to transfer some voice tapes of departed family members to CD in MP3. I remember it was finicky, inside the cover it tells you to reset the unit if the display acts up. Also the charger has small alignment 'tangs' which break off easily, I had to get a replacement when new. Theo