Victron IP65 6V, 12V & 24V Bluetooth Blue Smart Battery Chargers
Amazon.com: Duracell Coppertop 6V 908 Alkaline Lantern Battery with Spring Terminals, 1 Count Pack, 6-Volt Battery with Long-lasting Power for Household and Office Devices : Health & Household
6V, 12Ah LFP Battery (PVC, BLF-0612C)
Amazon.com: 6V Battery 700mAh AA Rechargeable Ni-Cd SM 2P Plug Spare Batteries Packs RC Car Road Vehicle Fast Race Off-Road Vehicle Rock Crawler : Toys & Games
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