Digital Security BD 712 12V 7Ah Alarm Battery - This is an AJC Brand Replacement : Amazon.ca: Electronics
12V 7.2AH Sealed Lead Acid Home Security Alarm Battery 7.2ah, 8ah, 2 PACK 840140936339 | eBay
Mighty Max Battery 12V 4.5Ah Home Alarm Security System SLA Battery Rechargeable Sealed Lead Acid 1250 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com