GP 4LR44 alkaline battery is the replacement for the now discontinued PX28 Mercuric Oxide battery which were used in many of the older 35mm SLR film cameras.
Meeting the highest standards, they are excellent in older photo equipment and other electronic devices. Long lasting power containing 0% mercury.
Composition: Silver Oxide
Size: 12.7mm Diameter x 25.6mm Length
Replaces: A544, 3131, PX28, 28A, PX28A, 476A, K28, V28, 4G13
Can be used together with the Millys Yashica Electro 35 Battery adapter* found here.
*Also replaces: PX32, Mallory TR164, Eveready 164, E164, V164, National HM-4N, 4NR52, V164PX, 1404M that was commonly used in cameras such as Yashicas (Electro 35GL, Electro GSN, Electro GTN, Electro AX, MG-1).