Mighty Max Battery ML18-12- 12Volt 18 AH, Nut and Bolt (NB) Terminal Rechargeable Sealed Lead Acid 12180 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
Amazon.com: AJC Battery Compatible with Long Way LW-6FM7.2J 12V 7Ah Sealed Lead Acid Replacement Battery : Health & Household
12V 7Ah Battery, Sealed Lead Acid battery (AGM), B.B. Battery EP7-12, 151x65x93 mm (LxWxH), Terminal T2 Faston 250 (6,3 mm)