You can get a proper adapter at Yashica Guy's website, or on eBay. The adapters that allow you to use a 4LR44 or 4SR44 are the best type. Also, make sure the light seals are in decent shape. You can use black yarn and glue it into the seal channels, and use the black felt material from old 35mm film canisters to make the big seal near the door hinge. The Yashica Electro 35 can take superb photos.