Amazon.com: TOPUSSE Rechargeable 6 Volt 4.5AH LiFePO4 Lantern Battery with Charger 1500+ Cycles, 6V Batteries Battery with BMS (Spring Terminals) 2 Pack : Health & Household
Amazon.com: Power Sonic 6VOLT 4.5AMP Hour Rechargeable Feeder Lantern Sealed 4.5AH Battery - 2 Pack : Automotive
6V 4.5AH Lithium Iron Phosphate battery packs, direct replacement for sealed lead acid batteries, LiFePO4 Chargers.
UPG 6-Volt 5 Ah S2 Terminal Sealed Lead Acid (SLA) AGM Rechargeable Battery UB650S Lantern - The Home Depot
Mighty Max Battery 6V 4.5AH SLA Battery for Coleman 5348 Lantern Rechargeable Sealed Lead Acid 645 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com