High Tech MS-4 & MS-5 Collar Keys B3V1A-Replacement Batteries

• High Tech Pet Battery Replacement for the MS-4 and MS-5 collar keys
• Set comes with 2 batteries
• Batteries last approximately 3 months

The MS-4 and MS-5 B3V1A battery replacement is for the High Tech Pet Door collar, which activates the opening of the High Tech Power Pet Automatic Door Mount. These High Tech pet batteries last approximately 3 months, so it is recommended to purchase more than one replacement set. These work only with the MS-4 and MS-5, not the discontinued MS-2 or MS-2A.

Please note that this battery is for your High Tech Power pet door dog collar only. It cannot be used to power your electronic pet door. Need to power your pet door? Check out the High Tech charger and battery kit.