{"product_id":"limitless-lithium-retro-pro-56-group-24-lithium-battery","title":"Limitless Lithium Retro Pro 56 Group 24 Lithium Battery","description":"\u003cdiv\u003e\n\u003cp\u003eLimitless Lithium Retro Pro 56 is a 12V LifePo4 battery built for high-drain car audio systems, delivering 56Ah of capacity in a compact Group 24 form factor with internal balancing for a streamlined install.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVoltage\u003c\/b\u003e: 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eResting Voltage Range\u003c\/b\u003e: 13.1V–13.4V — open-circuit voltage when the pack is at rest, useful for gauging state of charge before installation or after shutdown.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCapacity\u003c\/b\u003e: 56Ah (Not Pb Eq) 200-240 Pb Eq — rated usable capacity in LiFePO4 chemistry with a PbEq comparison used for cross-reference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eChemistry\u003c\/b\u003e: LifePo4 — lithium iron phosphate chemistry chosen for stable discharge characteristics in high-drain applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOperating Temperature Range\u003c\/b\u003e: -30 to 60 °C \/ -22 to 140 °F — designed to perform across a wide climate range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWeight\u003c\/b\u003e: 21 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions\u003c\/b\u003e: Height 8.75”, Depth 6.5”, Width 10.125” — fits standard Group 24 mounting footprints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBCI Group\u003c\/b\u003e: Group 24\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTerminal Size\u003c\/b\u003e: M8x125\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTerminal Orientation\u003c\/b\u003e: Positive Left\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLife Cycles\u003c\/b\u003e: 2,000 @ 80% DOD\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBattery Management System (BMS)\u003c\/b\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBalance Board\u003c\/b\u003e: Yes (Internal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMax Charge Voltage\u003c\/b\u003e: 14.8V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMax Input Charge Current\u003c\/b\u003e: 400A\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eContinuous Discharge Current\u003c\/b\u003e: 750A\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBurst Discharge Current\u003c\/b\u003e: 1200–1300A (Temperature dependent)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eContinuous Wattage Range\u003c\/b\u003e: 9,000–13,000W (100A–400A Alt)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBurst Wattage\u003c\/b\u003e: 16,000W\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDesigned for premium, high-draw audio systems, the Retro Pro 56 integrates into a Group 24 chassis and supports aggressive peak demands with high burst current ratings. Its internal balance board handles cell balancing within the unit, while the absence of an external BMS means installation must adhere to the specified voltage and current limits. The broad operating temperature range and long cycle life make it well suited to frequent recharge cycles in demanding car audio rigs, with rapid recharging potential thanks to a 14.8V max charge voltage and 400A max input.\u003c\/p\u003e \u003cbr\u003e \u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\" align=\"left\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eModel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003eRetro Pro 56\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eVoltage\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e12V\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eResting Voltage Range\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e13.1V-13.4V\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eCapacity (Amp Hours)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e56AH (Not Pb Eq) 200-240 Pb Eq\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eChemistry\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003eLifePo4\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eOperating Temperature Range\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e-30-60\u003cspan\u003e℃\/\u003c\/span\u003e-22\u003cspan\u003e℉-\u003c\/span\u003e140\u003cspan\u003e℉\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eWeight\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e21 lbs\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eDimensions\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003eHeight 8.75” Depth 6.5” Wide 10.125”\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eBCI Group Case\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003eGroup 24\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eTerminal Size\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003eM8x125\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eTerminal Orientation\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003ePositive Left\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eLife Cycles\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e2,000 @ 80% DOD\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eBattey Management System (BMS)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003eNo\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eBalance Board\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003eYes (Internal)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eMax Charge Voltage\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e14.8V\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eMax Charge voltage BMS Cutoff\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003eNA\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eMinimum Discharge Voltage BMS cutoff\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003eNA\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eMax Input Charge Current\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e400A *Charging higher than this can reduce cycle life\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eContinuous Discharge Current\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e750A\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eMax Discharge Current (Burst amperage)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e1200-1300A (Temperature dependent)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eContinuous Wattage Range (Alt. size dependent)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e9,000-13,000W (100A-400A Alt)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"308\"\u003e\n\u003cp\u003eBurst Wattage (Alt size dependent)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"316\"\u003e\n\u003cp\u003e16,000W\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Limitless Lithium","offers":[{"title":"Default Title","offer_id":49850228932836,"sku":null,"price":1339.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/2522\/9028\/files\/RETROPRO56-001__97324.webp?v=1789261120","url":"https:\/\/www.12voltoutlet.com\/products\/limitless-lithium-retro-pro-56-group-24-lithium-battery","provider":"12 Volt Outlet","version":"1.0","type":"link"}