6V 4.5Ah Rechargeable Lead Acid Battery UB645 | Impact Battery
UPG General Purpose Deep Cycle AGM Rechargeable Sealed Lead Acid 645 Alarm System Batteries in the Device Replacement Batteries department at Lowes.com
MIGHTY MAX BATTERY 6-Volt 4.5 Ah SLA (Sealed Lead Acid) AGM Type Replacement Battery for Alarm/Security Systems (15-Pack) ML4-6MP15 - The Home Depot