12V 5Ah battery, Sealed Lead Acid battery (AGM), battery-direct SBY-AGM-12-5, 90x70x101 mm (
Battery 12V 5AH (BAT-12V5AH)
12V 6Ah Rechargeable Sealed Lead Acid Battery - F2 Terminal
UPG General Purpose Deep Cycle AGM Rechargeable Sealed Lead Acid 1250 Alarm System Batteries in the Device Replacement Batteries department at Lowes.com