New B3V1A Lithium Battery for MS4 Electronic Collar

Designed specifically to prevent damage if accidentally installed incorrectly, This battery typically powers a collar for 5 months, and has a shelf life of years. Comes 2 per pack.

NOTE: This battery is required for all of the new High Tech Pet MS-4 Digital Microsonic Collars. Please ensure that you order ONLY the B3V1A battery for your MS4 collar.