6V 4.5AH Lithium Iron Phosphate battery packs, direct replacement for sealed lead acid batteries, LiFePO4 Chargers.
UPG 6-Volt 5 Ah F1 Terminal Sealed Lead Acid (SLA) AGM Rechargeable Battery UB650F Lantern - The Home Depot
Rechargeable Lantern Battery for UVP Portable UV Lamp
Amazon.com: Eveready 1209 6 Volt Super Heavy Duty Lantern Battery Each : Health & Household
Battery 6 Volt, Free USPS shipping 48 states – AdorStore Automatic Chicken Door
6 Volt 4AH Rechargeable Sealed Lead Acid SLA Battery 6 volt 4amp - Walmart.com
6-Volt Lantern Battery
Mighty Max Battery 6V 4.5AH SLA Multipurpose Rechargeable Battery Rechargeable Sealed Lead Acid 645 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com