6-FM-20 AGM Lead Acid UPS Electric Power Supply Battery 12V 20ah - China Electric Power Battery and Power Supply Battery
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
12V 22AH 6FM22 6-FM-22 Sealed Lead Acid Rechargeable Deep Cycle Battery - Newegg.com
SLA Replacement Battery for 12V 20AH T3 AGM Battery- Replaces 51814 6f – PartLimit
Mighty Max Battery 12V 22AH for 51814 6fm17 6-dzm-20 6-fm-18 lcx1220p Rechargeable Sealed Lead Acid 12220 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com