Mighty Max Battery Replaces cp0660 gp645 lcr6v4p hk-3fm4.5 wp4-6 Rechargeable Sealed Lead Acid 645 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
MULTIPOWER standard type MP4.5-6 6V 4,5Ah AGM supply battery
Lead acid battery 6 V 4.5 Ah Power QP6 4.5 QP6/5 QP6/3 QP6/3.2 QP6/4 QP6 4.2 6 V 4.5 Ah Agm Gel Like 4Ah 4,2Ah 4.5 Ah 5Ah Compatible: Amazon.de: Electronics & Photo