{"product_id":"stealth-energy-stealth-550-battery","title":"Stealth Energy Stealth 550 Battery","description":"\u003cdiv\u003e\n\u003cp\u003eStealth Energy Stealth 550 Battery is a 12V automotive battery built for serious car audio installs, delivering 55.0Ah nominal capacity and a 660A max discharge in an ABS enclosure with a T6 terminal.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eNominal Voltage\u003c\/b\u003e: 12V — standard for automotive electrical systems, ensuring compatibility with typical amplifiers and electronics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNominal Capacity (20HR) and Rated Capacity\u003c\/b\u003e: 55.0AH (nominal); RATED CAPACITY includes 57.2 AH\/2.86A (20hr), 55.0 AH\/5.50A (10hr), 47.3 AH\/9.46A (5hr), 42.9 AH\/14.3A (3hr), 33.6 AH\/33.6A (1hr) — shows how capacity changes with discharge rate in real-world loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMax Discharge Current\u003c\/b\u003e: 660A (5s) — enables high-current bursts for amplifiers without excessive voltage sag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInternal Resistance\u003c\/b\u003e: approx 7.5mΩ — lower resistance reduces voltage drop during peaks, helping maintain system voltage under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions\u003c\/b\u003e: Length 229+3 mm (9.02 in); Width 138+2 mm (5.43 in); Container Height 205+3 mm (8.07 in); Total Height with Terminal 211+3 mm (8.31 in).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eContainer Material\u003c\/b\u003e: ABS — rigid enclosure designed to withstand vehicle environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTerminal\u003c\/b\u003e: T6 — terminal type specified for connection compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOperating Temperature \u0026amp; Capacity Variation\u003c\/b\u003e: Discharge range -15 to 50 C; Charge 0 to 40 C; Storage -15 to 40 C. Capacity varies with temperature: 40 C 103%, 25 C 100%, 0 C 86%.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCycle and Standby\/Charging Guidance\u003c\/b\u003e: Cycle Use—initial charging current \u0026lt; 15.5A; voltage 14.4–15.0V at 25 C; temp coefficient -30mV\/°C. Standby Use—no initial-current limit; voltage 13.5–13.8V; temp coefficient -20mV\/°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSelf-Discharge\u003c\/b\u003e: Can be stored up to 6 months at 25 C; higher temperatures shorten the interval and a freshening charge is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn a high-current car audio build, this battery provides a robust energy reserve with predictable performance across a range of loads and temperatures. Its high peak capability, documented charging parameters, and durable ABS enclosure make it a reliable choice for multi-amp systems, front-stage kilowatt setups, and bass-heavy installs where voltage stability is essential.\u003c\/p\u003e \u003cbr\u003e \u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eNOMINAL VOLTAGE\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eNOMINAL CAPACITY(20HR)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e55.0AH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eAPPROX WEIGHT\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003eApprox 16.2 kg (35.17lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eTERMINAL\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003eT6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eCONTAINER MATERIAL\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003eABS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eMAX. DISCHARGE CURRENT\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e660A (5s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eINTERNAL RESISTANCE APPROX\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003eApprox 7.5mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eNOMINAL OPERATING TEMP. RANGE\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e25+3 C (77+5 F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eDIMENSION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 229+3mm (9.02 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 138+2mm (5.43 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContainer Height\u003c\/strong\u003e: 205+3mm (8.07 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Height (with Terminal):\u003c\/strong\u003e 211+3mm (8.31 inches)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eRATED CAPACITY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e57.2 AH\/2.86A:\u003c\/strong\u003e (20hr,1.80V\/cell,25 C\/77 F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e55.0 AH\/5.50A:\u003c\/strong\u003e (10hr,1.80V\/cell,25 C\/77 F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e47.3 AH\/9.46A:\u003c\/strong\u003e (5hr,1.75V\/cell,25 C\/77 F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42.9 AH\/14.3A:\u003c\/strong\u003e (3hr,1.75V\/cell,25 C\/77 F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e33.6 AH\/33.6A:\u003c\/strong\u003e (1hr,1.60V\/cell,25 C\/77 F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eCAPACITY AFFECTED BY TEMPERATURE\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cul\u003e\n\u003cli\u003e40 C (104 F): 103%\u003c\/li\u003e\n\u003cli\u003e25 C (77 F): 100%\u003c\/li\u003e\n\u003cli\u003e0 C (32 F): 86%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\u003cstrong\u003eOPERATING TEMP.RANGE\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarge:\u003c\/strong\u003e -15~50 C (5~122 F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharge:\u003c\/strong\u003e 0~40 C (32~104 F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e -15~40 C (5~104 F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\n\u003cp\u003e\u003cstrong\u003eCYCLE USE\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cul\u003e\n\u003cli\u003eInitial Charging Current less than 15.5A.Voltage\u003c\/li\u003e\n\u003cli\u003e14.4V~15.0V at 25 C(77 F)Temp. Coefficient -30mV\/ C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\n\u003cp\u003e \u003cstrong\u003eSTANDBY USE\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cul\u003e\n\u003cli\u003eNo limit on Initial Charging Current Voltage\u003c\/li\u003e\n\u003cli\u003e13.5V~13.8V at 25 C(77 F)Temp. Coefficient -20mV\/ C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.6739%;\"\u003e\n\u003cp\u003e\u003cstrong\u003eSELF DISCHARGE\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 66.657%;\"\u003e\n\u003cul\u003e\n\u003cli\u003eBatteries may be stored for up to 6 months\u003c\/li\u003e\n\u003cli\u003eat 25 C(77 F) and then a freshening charge is required.\u003c\/li\u003e\n\u003cli\u003eFor higher temperatures the time interval will be shorter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Stealth Energy","offers":[{"title":"Default Title","offer_id":49850170999012,"sku":null,"price":209.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/2522\/9028\/files\/stealth-550-battery-611065_500x_3cc79e0f-d539-4125-82a2-6b66bc845b2a.webp?v=1789259770","url":"https:\/\/www.12voltoutlet.com\/products\/stealth-energy-stealth-550-battery","provider":"12 Volt Outlet","version":"1.0","type":"link"}