Mighty Max Battery 12V 18AH Battery for Champion Generator 9000 7000 Rechargeable Sealed Lead Acid 12180 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
Amazon.com: NPP NP12-18Ah(Nut & Bolt, 2 Pcs) T3 Terminal 12V 18Ah AGM Rechargeable SLA Battery with Nut and Bolt Terminal for Solar Power, Generators, Medical Devices, Fences Replaces UB12180 FM12180 6fm18 :