PET-FENCE 6 Volt Battery Compatible For Pet Stop, Perimeter, ExtremeDog Fence Collar, Two CR1/3N 6v Batteries 170mah High Capacity lithium Battery! 1:Dog fence battery 6 Volt Battery Compatible For Pet Stop, Perimeter, Extreme Dog Fence Collar 2:It is assembled with 2 CR1 / 3N batteries, with high capacity of 170 mAh, normal storage shelf life of 10 years, and the effective service time of each battery is 3-6 months (according to the naughty degree of the dog). 3: 6v Pet collar Batteries Works with PCC-100, PCC-200, PTP IR-003, PTP FS-003 systems 4: Compatible For Pet Stop and Perimeter Technologies dog collars,Ultra Elite & Ulite Elite2 For Invisible Dog Fence Systems 5:The battery has a diameter of 11.7mm and a height of 21.2mm. It is a lithium battery. If your previous battery is 4 LR44 batteries, our 6V dog collar battery is also applicable. 6:If you have any problems during use, please contact us in time. The 6V dog collar batteries can be returned uncon ditionally or replaced free of charge.