Pyronix BATT-KF1215 3 Volt Lithium Wireless Keyfob Battery
Pyronix BATT-KF1215 is a replacement 3 volt lithium battery that is suitable for the Mk1 and Mk3 wireless Enforcer keyfob (KEYFOB-WE). The BATT-KF1215 lasts up to 2 years with normal operation.
The BATT-KF1215 is also a suitable replacement for the now discontinued BATT-CR1/3N which was used in the Mk1 keyfobs.
This is the recommended Pyronix replacement part.