12V 8Ah SLA Replacement Battery for Sunnyway SW1280 - MightyMaxBattery
Sunnyway SW1280 12V 9Ah Sealed Lead Acid Replacement Battery: BatteryClerk.com
UPG General Purpose Deep Cycle AGM Rechargeable Sealed Lead Acid 1280 Alarm System Batteries in the Device Replacement Batteries department at Lowes.com