PS-640F 6 Volt 4.5 Amp Hour Sealed Lead Acid Battery - Walmart.com
Traveller Heavy-Duty Battery, 1-6V at Tractor Supply Co.
6 volt Battery for RV
Mighty Max Battery 6-Volt 7 Ah Sealed Lead Acid Rechargeable Battery Rechargeable Sealed Lead Acid 670 Backup Power Batteries (4-Pack) in the Device Replacement Batteries department at Lowes.com
Eveready 1209 | 6V Lantern Battery | Battery Mart
Deka 6-Volt 448-Amp Golf Cart Battery in the Power Equipment Batteries department at Lowes.com