Amazon.com : Mighty Max Battery 12V 12AH Replacement Battery Compatible with Panasonic LC-RA1212P1 + 12V Charger : Electronics
Mighty Max Battery 6V 12AH Panasonic PC12-6X, PC12-6XB, PC12-6XBF1 Rechargeable Sealed Lead Acid 6120 Backup Power Batteries (10-Pack) in the Device Replacement Batteries department at Lowes.com