Amazon.com: Vision 6FM17-X 12V 18Ah Sealed Lead Acid Battery - This is an AJC Brand Replacement : Automotive
Mighty Max Battery 12V 18AH INT Terminal for 6fm17 6-dzm-20 6-fm-18 Rechargeable Sealed Lead Acid 12180 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com