2CR-1-3N FDK America, Inc., a member of Fujitsu Group | Battery Products | DigiKey
L544 6 Volt Lithium Battery (28L, PX28l & 2CR1/3N)
Amazon.com: TopOne 10 PC 2CR1 3N 6V Lithium Battery for Use in Dog Collars and More : Electronics
US SELLER ~ 2pcs 2CR1/3N WC2CR13N (L28PX L544) 6 Volt Lithium Coin Battery | eBay
US SELLER ~ 2pcs 2CR1/3N WC2CR13N (L28PX L544) 6 Volt Lithium Coin Battery | eBay
Duracell 28L 6 Volt Lithium Battery (PX28L, 2CR1/3N, L544)
2CR1/3N 6 Volt Battery for Pet Stop Dog Guard Perimeter and Extreme Dog Collar | eBay
Amazon.com: BlueDot Trading Single Pack 2CR1/3N or DL1/3N or CR11108 Lithium Manganese Dioxide Cell Battery 3V for Dog Collar, cameras, calculators, and more, Quantity 1 : Health & Household
Amazon.com: BlueDot Trading Single Pack 2CR1/3N Lithium Cell Replacement Battery 6.0V Low-Power Consumption for Dog Collar, Cameras, Calculators, Keyless Entry, and More : Automotive