NOCO HM484 Heavy-Duty 8D Battery Box The NOCO HM484 8D Commercial Grade Battery Box is a top-of-the-line, rugged storage container for group 8D batteries used by marine and recreational vehicles as well as a range of commercial equipment. Bolt-down slots on the corners enable secure, simple installation. 8 heavy gauge cable ports, meanwhile, will fasten the battery box to your boat, camper, motorhome, trailer, or caravan. The captive lid is held down by a pair of lock-down knobs with watertight rubber gaskets while the container is designed to retain full flow ventilation for the release of battery gases. The HM484 is compliant with US Coast Guard and American Boat and Yacht Council regulations and will protect batteries from environmental damage due to UV, oil, gasoline, and other contaminants.