{"product_id":"noco-hm408-commercial-grade-battery-box-single-4d-589-hm408","title":"NOCO HM408 Commercial-Grade Battery Box – Single 4D, Rotationally Molded","description":"\u003ch2\u003eNOCO HM408 Commercial-Grade Battery Box – Single 4D\u003c\/h2\u003e\u003cp\u003eBuilt for demanding marine, RV, and commercial applications, the HM408 is a heavy-duty enclosure designed to house a single Group 4D battery in environments where standard battery boxes simply aren’t enough. The \u003cstrong\u003erotationally molded construction\u003c\/strong\u003e delivers exceptional impact resistance and structural rigidity, protecting your battery against UV exposure, oil, fuel, and other contaminants season after season.\u003c\/p\u003e\u003cp\u003eA \u003cstrong\u003efour-corner fastening system\u003c\/strong\u003e and captive lid keep the box securely closed even in rough conditions, while \u003cstrong\u003elarge cable entry holes accepting up to 4\/0 AWG wire\u003c\/strong\u003e make it compatible with high-current applications and heavy-gauge wiring runs. Full-flow ventilation channels safely release battery gases, and a built-in battery acid reservoir provides an added layer of protection against spills.\u003c\/p\u003e\u003cp\u003eMeets \u003cstrong\u003eUSCG CFR 183.420\u003c\/strong\u003e and \u003cstrong\u003eABYC E-10.7\u003c\/strong\u003e standards — a compliant choice for inspected vessels and commercial workboats.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRotationally molded construction for superior impact resistance and UV protection\u003c\/li\u003e\n\u003cli\u003eFour-corner fastening system with captive lid\u003c\/li\u003e\n\u003cli\u003eLarge cable entry holes — accepts up to 4\/0 AWG wire\u003c\/li\u003e\n\u003cli\u003eFull-flow ventilation for safe battery gas release\u003c\/li\u003e\n\u003cli\u003eBuilt-in battery acid reservoir\u003c\/li\u003e\n\u003cli\u003eMeets USCG CFR 183.420 and ABYC E-10.7 standards\u003c\/li\u003e\n\u003cli\u003eFits single Group 4D batteries\u003c\/li\u003e\n\u003cli\u003eSuitable for marine, RV, and commercial equipment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBest Use Case\u003c\/h3\u003e\u003cp\u003eThe go-to enclosure for commercial workboats, large offshore fishing vessels, and heavy-duty RV or generator installations running a single Group 4D battery. The rotationally molded shell and compliance certifications make it the right choice when a standard snap-top or injection-molded box won’t meet the structural or regulatory requirements of the application. Particularly well-suited for engine rooms and bilge compartments where chemical exposure, vibration, and temperature extremes are a concern.\u003c\/p\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eThe HM408 is part of NOCO’s commercial-grade HM series. If your installation requires a different battery configuration, see the \u003ca href=\"\/products\/noco-hm484-commercial-grade-battery-box-single-8d\"\u003eNOCO HM484 Commercial-Grade Battery Box – Single 8D\u003c\/a\u003e for a larger single-battery option, the \u003ca href=\"\/products\/noco-hm426-commercial-grade-battery-box-dual-6v\"\u003eNOCO HM426 Commercial-Grade Battery Box – Dual 6V\u003c\/a\u003e for dual 6V configurations, or the \u003ca href=\"\/products\/noco-hm485-commercial-grade-battery-box-dual-8d\"\u003eNOCO HM485 Commercial-Grade Battery Box – Dual 8D\u003c\/a\u003e for the largest dual-battery option in the series. For smaller Group 24–31 applications, see the \u003ca href=\"\/products\/noco-bg31-snap-top-battery-box-use-with-group24-31\"\u003eNOCO BG31 Snap Top Battery Box – Group 24–31\u003c\/a\u003e or the \u003ca href=\"\/products\/noco-bg27-snap-top-battery-box-for-group-27\"\u003eNOCO BG27 Snap Top Battery Box – Group 27\u003c\/a\u003e.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199410995236,"sku":"589-HM408","price":247.65,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/589-HM408.jpg?v=1785604862","url":"https:\/\/marisolmarine.com\/products\/noco-hm408-commercial-grade-battery-box-single-4d-589-hm408","provider":"Marisol Marine Company","version":"1.0","type":"link"}