Duracell J or 7k67 or 4LR61, 1 Battery in a pack This 6-volt J alkaline battery is primarily used to power photo equipment, TV remotes and medical equipment. For further Technical Information please visit http://www.duracell.com/oem/safety/pdf/2002_8E.pdf Also known as: 7K67, 539, 867, J, KJ, 4018, 1412AP, GP1412AP.