{"product_id":"attwood-90841-large-battery-box-black-vented-fits-group-29-31-23-90841","title":"Attwood 90841 Large Vented Battery Box – Group 29, Black","description":"\u003cp\u003eThe \u003cstrong\u003eAttwood 90841\u003c\/strong\u003e is a large vented marine battery box designed to fit Group 29 and Group 31 batteries — the deep-cycle and dual-purpose batteries commonly used for house banks, trolling motors, and high-draw marine electrical systems. Built from acid-resistant polypropylene and compliant with ABYC standard E-10 and USCG Specification 183.420, it meets the same standards as the rest of the Attwood battery box range in a larger footprint.\u003c\/p\u003e\n\n\u003cp\u003eFour enlarged cable openings (0.55\" diameter) allow clean routing of heavy-gauge battery cables without tight bends, and large handles with rolled edges make the box manageable during installation despite the added size and weight of Group 29\/31 batteries. Mounting hardware is included.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eFits Group 29 and Group 31 batteries\u003c\/li\u003e\n\u003cli\u003eVented design — allows hydrogen gas to escape safely during charging of flooded lead-acid batteries\u003c\/li\u003e\n\u003cli\u003eFour enlarged cable openings — 0.55\" diameter for clean, unrestricted cable routing\u003c\/li\u003e\n\u003cli\u003eLarge handles with rolled edges for carrying and positioning\u003c\/li\u003e\n\u003cli\u003eABYC E-10 and USCG 183.420 compliant\u003c\/li\u003e\n\u003cli\u003eAcid-resistant polypropylene construction\u003c\/li\u003e\n\u003cli\u003eMounting hardware included\u003c\/li\u003e\n\u003cli\u003eBlack finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eBest Use Case:\u003c\/strong\u003e Designed for Group 29 and Group 31 deep-cycle or dual-purpose batteries used in house banks, trolling motor systems, or high-capacity marine electrical setups. The larger footprint and reinforced handles make it practical for the heavier batteries in these groups.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eParts Desk Insights:\u003c\/strong\u003e This is a vented box — correct for flooded lead-acid (wet cell) batteries that off-gas hydrogen during charging. If you are installing a sealed AGM or gel battery, a non-vented enclosure is more appropriate. Group 29 and Group 31 batteries are physically large and heavy — confirm your installation space before ordering. For smaller battery groups, see the \u003ca href=\"\/products\/attwood-90651-standard-vented-battery-box-group-24-24m-black\"\u003eAttwood 90651 Standard Vented Battery Box – Group 24\/24M\u003c\/a\u003e, the \u003ca href=\"\/products\/attwood-90671-power-guard-vented-battery-box-group-27m-black\"\u003eAttwood 90671 Power Guard Vented Battery Box – Group 27M\u003c\/a\u003e, or the \u003ca href=\"\/products\/attwood-90707-powerguard-pro-battery-box-group-24-27-23-90707\"\u003eAttwood 90707 PowerGuard Pro Battery Box – Group 24\/27\u003c\/a\u003e.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199410634788,"sku":"23-90841","price":49.39,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/23-90841.jpg?v=1785604849","url":"https:\/\/marisolmarine.com\/products\/attwood-90841-large-battery-box-black-vented-fits-group-29-31-23-90841","provider":"Marisol Marine Company","version":"1.0","type":"link"}