Mighty Max Battery ML4-6- 6 Volt 4.5 AH, F1 Terminal Rechargeable Sealed Lead Acid 645 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
MIGHTY MAX BATTERY 6-Volt 4.5 Ah SLA Battery Replacement for Long Way LW-3FM4.5B MAX3932181 - The Home Depot
840-844 R&D Batteries, Inc. 4.5 V CLOCK BATTERY : PartsSource : PartsSource - Healthcare Products and Solutions