NOCO HM408 4D Battery Box Harbor 4D Batteries, Simple Installation The NOCO HM408 is a battery box fit for your line of work. This commercial-grade battery box is designed to store group 4D batteries, including marine, RV, and commercial equipment. A four-corner fastening system and captive lid allow for streamlined installation in a camper, boat, motorhome, or trailer. Expertly Crafted For Comprehensive Protection Constructed tough and rotationally molded, the HM408 protects 4D batteries from a host of contaminants. It keeps batteries stable and unharmed against low temperatures, UV, oil, and gas. It maintains impact resistance properties in conditions down to -20℉ and has UV inhibitors and color stabilizers that prevent structural damage and color fading. Withstand the great outdoors with this dependable battery box. Ventilated Safety The internal design ensures harbored batteries are kept ventilated and contained in full. A ventilated cover has a number of exit points, allowing for any battery fumes to be quickly and safely discharged. The lower reservoir in the box helps to collect any spilled battery acid in a safe way to prevent damage. Keep your 4D batteries functional with the HM408.