I have two vintage cassette players a sanyo and a Toshiba the sanyo is a three-ban equalizer model number MGR-74 the Toshiba is a kt-4016 working condition is unknown on either I've got literally one double a battery the sanyo takes three the Toshiba takes two even if I had more batteries I wouldn't even have a tape to test them with or earphones to plug into them LOL I'm selling them as is the judge condition for yourself happy bidding