Mighty Max Battery 12V 18AH GEL for Troy-Bilt 7000 Watt XP Generator Rechargeable Sealed Gel 12180 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
Duracell Ultra 12V 18AH General Purpose AGM SLA Battery with M6 Nut and Bolt Terminals - SLAA12-18NB at Batteries Plus
12 Volt 18 Ah Sealed Lead Acid Rechargeable Battery with Nut & Bolt Terminals | Battery Mart
Mighty Max Battery 12V 18AH SLA Battery for Enduring 6FM18, 6-FM-18 Rechargeable Sealed Lead Acid 12180 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com