Group 24–31 Snap-Top Battery Box Vented – NOCO BG31 (HM318BKS)

This new Group 24–31 Snap-Top Battery Box BG31 (HM318BKS) is a rugged, fully ventilated battery enclosure designed to safely house a single Group 24, 27, or 31 automotive, marine, or RV battery. Manufactured by NOCO, this heavy-duty battery box is built from reinforced, UV-resistant plastic and engineered for demanding environments where durability and safety are critical.

The snap-top lid uses locking tabs to secure the cover firmly to the base, while reinforced carrying handles help prevent cracking during transport or installation. An adjustable internal divider allows the box to accommodate multiple battery sizes while maintaining a secure fit.

Designed to maintain structural integrity down to -20°F, this battery box also resists UV exposure, oil, gas, and other contaminants. Certified to U.S. Coast Guard CFR 183.420 and ABYC E-10.7 standards, it is suitable for enclosed and mobile installations requiring compliant battery containment.

Key Specifications

• Manufacturer Part Number: BG31

• Alternate Model: HM318BKS

• Battery Compatibility: Group 24, Group 27, Group 31

• Battery Quantity: 1

• Material: Reinforced plastic

• Color: Black

• Finish: Matte

• Vented: Yes (fully ventilated)

• Marine Rated: Yes

• Includes Hold-Down: No

• Includes Cable: No

Dimensions

• Inside Dimensions: 14" Length x 7-1/8" Width x 9-5/8" Height

• External Dimensions: 17-5/8" Length x 10" Width x 10-3/4" Height

Features & Benefits

• Fits Group 24, 27, and 31 batteries with adjustable internal divider

• Snap-top lid with locking tabs secures cover to the battery case

• Fully ventilated design safely releases battery gases

• Reinforced plastic construction resists impact, UV, oil, gas, and contaminants

• Maintains impact resistance down to -20°F

• Heavy-duty integrated carrying handles reduce cracking during transport

• Meets U.S. Coast Guard CFR 183.420 and ABYC E-10.7 standards

Included Components

• Battery box with snap-top lid

• Adjustable internal divider

• 42-inch battery box strap

Applications

• Automotive battery installations

• RV and motorhome battery compartments

• Marine battery storage

• Campers, trailers, and caravans

• Generator equipment

Warranty & Notes

• Limited 1-Year Manufacturer Warranty

• Manufacturer: NOCO