High discharge characteristics for applications such as digital cameras, flash units etc Lithium Cylindrical Battery CR2 panasonic Lithium Cylindrical batteries type CR come as either single cells or dual cell packs. Pack batteries are packaged in a resin case enabling easy replacement by users and their development was pioneered by Panasonic. ConstructionAll cylindrical type manganese dioxide (CR series) Lithium batteries feature a spiral structure, and by enlarging the surface areas of the positive and negative electrodes they allow a current as high as several amperes to be drawn. Panasonic Lithium Cylindrical batteries type CR come as either single cells or dual cell packs. Pack batteries are packaged in a resin case enabling easy replacement by users and their development was pioneered by Panasonic. All cylindrical type manganese dioxide (CR series) Lithium batteries feature a spiral structure, and by enlarging the surface areas of the positive and negative electrodes they allow a current as high as several amperes to be drawn.