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.