{"product_id":"12v-to-13-8v-5a-dc-dc-battery-maintainer-rv-marine-lead-acid-float-charger","title":"12V to 13.8V 5A DC-DC Battery Maintainer | RV Marine Lead-Acid Float Charger","description":"\u003ch2\u003eKeep Your Lead-Acid Battery at Peak Charge — Without a Shore Power Connection\u003c\/h2\u003e\n\u003cp\u003eRunning an RV, boat, or backup power system from a 12V battery bank? The \u003cstrong\u003eJason Bang Power 12V to 13.8V 5A Battery Maintainer\u003c\/strong\u003e steps your primary 12V supply up to the precise \u003cstrong\u003e13.8V float voltage\u003c\/strong\u003e that lead-acid batteries demand — delivering a steady trickle charge that keeps your auxiliary battery topped off and ready to go, no wall outlet needed.\u003c\/p\u003e\n\u003cp\u003eUnlike bulky smart chargers that require AC power, this compact DC-DC module runs entirely off your vehicle's electrical system, solar input, or any 12V source. It's the ideal solution for \u003cstrong\u003edual-battery systems, RV auxiliary batteries, marine deep-cycle banks, and emergency backup setups\u003c\/strong\u003e where maintaining battery health matters more than fast charging.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise 13.8V Float Output:\u003c\/strong\u003e Matches the optimal absorption\/float voltage for standard 12V lead-acid, AGM, and VRLA batteries — prevents overcharging and sulfation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5A Continuous Output (69W):\u003c\/strong\u003e Adequate for maintaining or slow-charging batteries up to 200Ah — ideal for float maintenance and overnight charging\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8–12V Input Range:\u003c\/strong\u003e Works with 12V vehicle systems, 24V alternators, and solar charge controllers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Install Size:\u003c\/strong\u003e 74×74×32mm footprint fits under dashboards, in battery compartments, or inside control boxes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Protection Suite:\u003c\/strong\u003e Short-circuit, overcurrent, reverse polarity, and over-temperature protection built in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Efficiency:\u003c\/strong\u003e ≥93% conversion efficiency — minimal heat, minimal battery drain from the source\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-Forget:\u003c\/strong\u003e Fixed 13.8V output, no adjustment needed — connect and let it maintain your battery automatically\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100.059%; height: 255.719px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 26.7993%; height: 19.5938px;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"width: 70.6458%; height: 19.5938px;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.7993%; height: 19.5938px;\"\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd style=\"width: 70.6458%; height: 19.5938px;\"\u003e8V – 12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.7993%; height: 19.5938px;\"\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd style=\"width: 70.6458%; height: 19.5938px;\"\u003e13.8V DC (fixed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.7993%; height: 19.5938px;\"\u003eOutput Current\u003c\/td\u003e\n\u003ctd style=\"width: 70.6458%; height: 19.5938px;\"\u003e5A continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.7993%; height: 19.5938px;\"\u003eOutput Power\u003c\/td\u003e\n\u003ctd style=\"width: 70.6458%; height: 19.5938px;\"\u003e69W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.7993%; height: 19.5938px;\"\u003eConversion Efficiency\u003c\/td\u003e\n\u003ctd style=\"width: 70.6458%; height: 19.5938px;\"\u003e≥93%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.7993%; height: 19.5938px;\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd style=\"width: 70.6458%; height: 19.5938px;\"\u003e-20°C to +65°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.7993%; height: 19.5938px;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"width: 70.6458%; height: 19.5938px;\"\u003e74 × 74 × 32 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.7993%; height: 19.5938px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"width: 70.6458%; height: 19.5938px;\"\u003e250g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.7993%; height: 19.5938px;\"\u003eProtections\u003c\/td\u003e\n\u003ctd style=\"width: 70.6458%; height: 19.5938px;\"\u003eShort-circuit, Overcurrent, Reverse polarity, Over-temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.7993%; height: 19.5938px;\"\u003eSuitable Battery Types\u003c\/td\u003e\n\u003ctd style=\"width: 70.6458%; height: 19.5938px;\"\u003eLead-Acid, AGM, VRLA (NOT for LiFePO4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🚐 RV dual-battery systems — keep your house battery charged while driving\u003c\/li\u003e\n\u003cli\u003e⛵ Marine auxiliary battery maintenance\u003c\/li\u003e\n\u003cli\u003e🚗 Automotive battery trickle chargers running off the main battery\u003c\/li\u003e\n\u003cli\u003e☀️ Solar + battery systems that need regulated 13.8V charge input\u003c\/li\u003e\n\u003cli\u003e🔋 Emergency\/standby backup battery float maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e 13.8V is the correct float\/absorption voltage for standard lead-acid batteries. If you're charging a LiFePO4 (lithium iron phosphate) battery, please see our \u003cstrong\u003e14.6V LiFePO4 Charger\u003c\/strong\u003e instead — using wrong voltage will damage lithium cells.\u003c\/em\u003e\u003c\/p\u003e","brand":"Jason Bang","offers":[{"title":"12V to 13.8V 5A 69W","offer_id":43574372270170,"sku":null,"price":54.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/9154\/7482\/files\/5L_3_63e4d160-1612-4b38-a7ac-c839e9afe4d2.jpg?v=1782304990","url":"https:\/\/jasonbangpower.com\/fr\/products\/12v-to-13-8v-5a-dc-dc-battery-maintainer-rv-marine-lead-acid-float-charger","provider":"Jason Bang","version":"1.0","type":"link"}