2cr 1/3n Sanyo Fujitsu Collar Battery 2cr 13n Sanyo Fujitsu Collar Battery Sanyo 2cr 13n Batteries are now known as Fujitsu 2cr 13n & are indentical internally they remain in our opinion the best performing spray collar battery Fujitsu 2cr 13n Lithium Collar battery Suitable for the following Dynavet Collars Jetcare Pro Masterplus Aboistop Compact & Jetcare Mini