Battery Box That Will Fit Four 6-Volt Batteries | etrailer.com
NOCO HM306BK Single 6V Snap-Top Battery Box - Walmart.com
Amazon.com: Camco Double Battery Box | Safely Stores RV, Automotive, and Marine Batteries | Features a Heavy-Duty Corrosion-Resilient Polymer Construction and Measures Inside 21-1/2" x 7-3/8" x 11-3/16" (55375) : Automotive