Amazon.com: 12V 55Ah SLA Battery Replaces AGM BCI Group 34/78 Car and Truck : Automotive
Duracell Ultra 12V 35AH Deep Cycle AGM SLA Battery with J Terminals - SLADC12-35J at Batteries Plus
Mighty Max Battery 12V 125AH for Solar / Wind Storage Deep Cycle Rechargeable Sealed Lead Acid 121250 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com