{"product_id":"millertech-12v-190ah-dual-purpose-marine-battery","title":"MillerTech 12V 190Ah Dual Purpose Lithium Marine Cranking Battery with Bluetooth","description":"\u003cp style=\"font-size: 18px;\"\u003eSpend the day fishing, not worrying about your battery. The MillerTech 12V 190Ah Dual Purpose lets one battery do two jobs: fire up your outboard the moment you turn the key, then run every screen and pump on your boat from first light to the last cast.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThat means starting a big motor, verified by MillerTech for Mercury 4-stroke outboards up to 250hp, and still having the reserve to keep multiple graphs, forward-facing sonar, livewells, and aerators running all day. Anglers regularly fish a full 8-hour tournament with everything on and come back with charge to spare. No mid-day power anxiety, no cutting the trip short, no dead battery at the ramp.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eIt also cleans up your rig. Instead of a heavy starting battery plus a separate deep-cycle bank, you run one Group 31 battery that weighs about 42 lbs, far less than the lead-acid setup it replaces, so your boat sits lighter and gets on plane easier. Built-in Bluetooth shows exactly how much power you have left right on your phone, so there is never a guess.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eAnd it is a buy-once decision. With a long rated cycle life and a 10-year warranty behind it, this battery is built to outlast several sets of lead-acid. If you want one dependable battery to both start your motor and power your electronics, on a bass boat, an offshore or center console rig, or as house power in an RV, this is built for exactly that.\u003c\/p\u003e\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul style=\"font-size: 18px;\"\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003e1500 Cold Cranking Amps (CCA):\u003c\/strong\u003e Provides the burst of current needed to start large outboards. Verified by MillerTech for Mercury 4-stroke motors up to 250hp, so you get reliable starts.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003e190Ah Reserve Capacity:\u003c\/strong\u003e Supplies steady power to graphs, forward-facing sonar, livewell pumps, and 12V electronics, letting you run your setup through a full day on the water.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eDual Purpose Design:\u003c\/strong\u003e Combines cranking and deep-cycle capability in one battery, which can reduce the number of batteries and total weight in your boat.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eLiFePO4 Prismatic Cells:\u003c\/strong\u003e Deliver a flat voltage curve, keeping electronics running consistently as the battery discharges rather than fading like lead-acid.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eLong Cycle Life:\u003c\/strong\u003e Rated for up to about 8000 cycles at shallow depth of discharge and around 2000 cycles at full depth of discharge, measured to 80% remaining capacity, which supports years of regular use.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eSmart Battery Management System (BMS):\u003c\/strong\u003e Protects against over-charge, over-discharge, over-current, and unsafe high and low temperatures, and passively balances the cells at the top of each charge to help extend battery life.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eLow-Temperature Charging Protection:\u003c\/strong\u003e Prevents charging in freezing conditions to protect the cells, useful for cold-weather and early-season use.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eBluetooth Monitoring:\u003c\/strong\u003e Connects to the MillerTech app to show state of charge, voltage, real-time current, temperature, and cycle count, and can monitor multiple MillerTech batteries at once.\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003e98% Efficiency:\u003c\/strong\u003e Makes nearly all stored energy usable, supporting longer run times and faster charging.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eSealed, Water-Resistant Case:\u003c\/strong\u003e Built with a thick rubber gasket and a stainless steel breather vent to help guard against moisture and condensation. Keep it out of direct rain, spray, and standing water.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eRecloseable Heavy-Duty Case:\u003c\/strong\u003e Allows access for service years down the line, with molded strap grooves to keep hold-downs seated securely.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eHeavy-Duty M8 Terminals:\u003c\/strong\u003e Reduce heat build-up when the application is drawing maximum power. Torque to 10 ft-lbs with a torque wrench for a secure connection.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eUL 1973 Certified:\u003c\/strong\u003e Independently tested to ANSI\/CAN\/UL 1973:2022 Ed.3, a safety standard that evaluates the full battery system, not just the cells.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003eBCI Group 31 Footprint, 42 lbs:\u003c\/strong\u003e Fits standard Group 31 trays and is lighter than a comparable lead-acid battery.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e\n\u003cstrong\u003e10-Year Warranty:\u003c\/strong\u003e Backed by MillerTech, with no warranty registration required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility \u0026amp; Applications\u003c\/h3\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThis battery is a dual purpose starting and deep-cycle battery for marine and RV use. Use the guidance below to confirm it fits your setup.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003e\u003cstrong\u003eRecommended Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"font-size: 18px;\"\u003e\n\u003cli style=\"font-size: 18px;\"\u003eBass and multi-species boats using one battery for starting and electronics\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003eOffshore and center console boats\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003eRV 12V house and deep-cycle power\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 18px;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"font-size: 18px;\"\u003e\n\u003cli style=\"font-size: 18px;\"\u003eStarting outboard motors, verified for Mercury 4-stroke up to 250hp\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003eRunning fish finders, forward-facing sonar, multiple graphs, livewell and aerator pumps, stereo, and other 12V electronics\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003eProviding house and deep-cycle power in RVs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 18px;\"\u003e\u003cstrong\u003eSeries and Parallel\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe battery can be connected in series or parallel. Up to 4 batteries can be wired in series to build a 24V, 36V, or 48V system, or up to 4 in parallel for more capacity. Match battery voltages before connecting and use appropriate fuses or breakers. In a series bank, charge with a multi-bank charger, or fully charge each battery individually about every 10 cycles to keep the pack balanced.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCompatibility Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"font-size: 18px;\"\u003e\n\u003cli style=\"font-size: 18px;\"\u003eUse a LiFePO4-compatible charger. A standard lead-acid charger may not fully charge a lithium battery because it stops at a lower voltage.\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003eDo not charge with an unregulated alternator or a non-lithium charger.\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003eFits standard BCI Group 31 battery trays at 13” x 6.75” x 9”.\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003eFor outboard brands other than Mercury, confirm your motor’s charging system is regulated and rated for lithium batteries before installing. Some manufacturers advise checking the regulated charging output voltage first.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCharging \u0026amp; Compatible Chargers\u003c\/h3\u003e\n\u003cp style=\"font-size: 18px;\"\u003eCharging is simple with the right charger. Use a lithium (LiFePO4) charger with a 14.2–14.6V charging profile. A standard lead-acid charger may stop at a lower voltage and only partially charge the battery, and in some cases can trip the BMS. If your charger is labeled for lead-acid only, or has a desulfation or repair mode, use a LiFePO4 charger instead.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003e\u003cstrong\u003eFirst charge\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe battery ships partially charged due to shipping regulations. Charge it fully before installing it in your application.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCharge rate and time\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eMillerTech lists a recommended charge current of about 50A and a maximum charge current of 150A for this battery, so every MillerTech charger falls comfortably within a safe, cell-friendly range. Approximate charge time from a low battery to full:\u003c\/p\u003e\n\u003cul style=\"font-size: 18px;\"\u003e\n\u003cli style=\"font-size: 18px;\"\u003e10A charger (1210C): about 19 hours\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e20A charger (1220C or 1220M on-board): about 9 to 10 hours\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003e15A per bank (multi-bank chargers): about 13 hours per battery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThese are full-charge estimates from a low battery. In normal use you rarely start from empty, so real recharge times are shorter. You can watch charge progress live in the MillerTech app.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003e\u003cstrong\u003eSettings for programmable chargers\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"font-size: 18px;\"\u003e\n\u003cli style=\"font-size: 18px;\"\u003eBulk and absorption voltage: 14.2 to 14.6V, held about 15 to 20 minutes per battery\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003eFloat: not required; 13.5 to 13.8V may be used when connected to shore power\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003eEqualization: turn off, or set below 14.6V and 0 hours\u003c\/li\u003e\n\u003cli style=\"font-size: 18px;\"\u003eTemperature compensation: turn off or set to 0, since it can trigger the BMS protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCharging on the water\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eAs a dual purpose cranking battery, it is designed to be maintained by your outboard’s regulated charging system while you run, the same way a starting battery is. After a heavy day running electronics, top it off with a LiFePO4 shore charger. To charge while operating a 12V plus 24V or 12V plus 36V system, MillerTech’s On The Run Dark Speed chargers are built for that.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCold weather\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eDo not charge below freezing. The battery’s low-temperature charging protection prevents this automatically. Its charge temperature range is 25°F to 131°F; allow the battery to warm above 32°F before charging.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCompatible MillerTech chargers\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eMillerTech confirms the following chargers are compatible with the 12V 190Ah Dual Purpose (12190-DP):\u003c\/p\u003e\n\u003ctable style=\"font-size: 18px;\" border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCharger\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eOutput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eBest For\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V 10A (1210C)\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e14.6V, 10A\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eOvernight or lighter daily use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V 20A (1220C)\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e14.6V, 20A\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eSame-day recharge, harder use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V 20A On-Board (1220M)\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e14.5V, 20A, IP65\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003ePermanent boat install; plug into shore power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V 15A 2-Bank (1215-2)\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e15A per bank\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eCharging two 12V batteries, such as crank plus electronics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V 15A 3-Bank (1215-3)\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e15A per bank\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eCharging three 12V batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V\/16V\/24V 3-Bank (121624-3)\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eMulti-voltage\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V + 16V + 24V setups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V\/16V\/36V 3-Bank (121636-3)\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eMulti-voltage\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V + 16V + 36V setups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V-24V Dark Speed On The Run\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e14.5V \/ 28.8V, 15A, IP65\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eCharging a 12V plus 24V bank while operating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12V-36V Dark Speed On The Run\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e14.5V \/ 42.6V, 15A, IP65\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eCharging a 12V plus 36V bank while operating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe MillerTech 12V 5A charger (125C) is not recommended for this battery. It is intended for smaller batteries and would charge a 190Ah battery very slowly. Any quality LiFePO4 charger with a 14.2 to 14.6V profile will also work.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"font-size: 18px;\" border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12190-DP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eChemistry\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eLithium Iron Phosphate (LiFePO4 \/ LFP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCapacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e190Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eEnergy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e2432Wh (2.43 kWh)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eNominal Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e12.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCold Cranking Amps (CCA)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e1500A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eMax Charge Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e150A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eRecommended Charge Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e50A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eMax Continuous Discharge Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e100A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003ePeak Discharge Current (5 sec)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e300A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eMax Charge Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e14.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eFloat Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e13.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eLow-Voltage Cut-Off\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e10V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eSelf-Discharge\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eLess than 4% per month\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCycle Life (to 80% capacity)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eUp to 8000 cycles at 30% DoD; ~5000 at 50% DoD; ~3800 at 80% DoD; ~2000 at 100% DoD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eEfficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e98%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCell Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003ePrismatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eBattery Management System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eLow-Temp Charging Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCharge Temperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e25°F to 131°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eOperating (Discharge) Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e-4°F to 140°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eBluetooth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eYes (MillerTech app)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eTerminals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eM8 (torque to 10 ft-lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eGroup Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eBCI Group 31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e13” x 6.75” x 9”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e42 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eSeries \/ Parallel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eUp to 4 in series (to 48V) or up to 4 in parallel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003eUL 1973 (ANSI\/CAN\/UL 1973:2022 Ed.3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-size: 18px;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cstyle\u003e\n.lbs-faq{max-width:100%;}\n.lbs-faq .lbs-faq-item{border-bottom:1px solid #dddddd;}\n.lbs-faq input[type=\"checkbox\"]{position:absolute;opacity:0;height:0;width:0;}\n.lbs-faq label{display:block;cursor:pointer;padding:16px 34px 16px 0;font-size:18px;font-weight:600;position:relative;}\n.lbs-faq label::after{content:\"+\";position:absolute;right:8px;top:14px;font-size:24px;line-height:1;}\n.lbs-faq input[type=\"checkbox\"]:checked + label::after{content:\"\\2013\";}\n.lbs-faq .lbs-faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease;}\n.lbs-faq input[type=\"checkbox\"]:checked ~ .lbs-faq-answer{max-height:1400px;}\n.lbs-faq .lbs-faq-answer p{font-size:18px;margin:0;padding:0 0 18px;}\n\u003c\/style\u003e\n\u003cdiv class=\"lbs-faq\"\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq1\"\u003e \u003clabel for=\"lbsfaq1\"\u003eWhat is a dual purpose marine battery?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eA dual purpose battery combines the starting power of a cranking battery with the reserve capacity of a deep-cycle battery. It can start your outboard and also run your onboard electronics from the same unit, which can reduce the number of batteries you carry in your boat.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq2\"\u003e \u003clabel for=\"lbsfaq2\"\u003eCan this battery start my outboard motor?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eYes. It provides 1500 cold cranking amps for starting power. MillerTech verifies compatibility with Mercury 4-stroke outboards up to 250hp, and customers have used it for starting since 2016. For other outboard brands, confirm your motor’s charging system is regulated and rated for lithium batteries before installing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq3\"\u003e \u003clabel for=\"lbsfaq3\"\u003eHow long will it run my fish finders and forward-facing sonar?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eRun time depends on how many devices you run and how much they draw. With 190Ah of reserve, many anglers run multiple graphs, forward-facing sonar, and livewell pumps through a full day and finish with charge to spare. A common field estimate is roughly 2Ah per graph or sonar module per hour, which you can track live in the MillerTech app.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq4\"\u003e \u003clabel for=\"lbsfaq4\"\u003eWhat charger should I use?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eUse a LiFePO4-compatible charger with a 14.2 to 14.6V profile. A standard lead-acid charger may only charge the battery partially because it stops at a lower voltage, and it may not restart charging if the battery has gone into low-voltage protection. Many onboard marine chargers include a lithium setting. Do not charge with an unregulated alternator.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq5\"\u003e \u003clabel for=\"lbsfaq5\"\u003eWhich MillerTech chargers are compatible with this battery?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eMillerTech confirms compatibility with its 12V 10A (1210C), 12V 20A (1220C), 12V 20A on-board (1220M), 2-bank (1215-2), 3-bank (1215-3), multi-voltage 3-bank (121624-3 and 121636-3), and On The Run Dark Speed dual marine chargers. The 12V 5A charger (125C) is not recommended for a battery this size. Any quality LiFePO4 charger with a 14.2 to 14.6V profile also works.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq6\"\u003e \u003clabel for=\"lbsfaq6\"\u003eHow long does it take to charge?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eDivide the capacity by the charger output. From a low battery, that is about 19 hours with a 10A charger or about 9 to 10 hours with a 20A charger. You rarely start from empty, so real recharge times are usually shorter. You can track charge level live in the MillerTech app.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq7\"\u003e \u003clabel for=\"lbsfaq7\"\u003eCan my outboard charge the battery while I run?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eYes. As a dual purpose cranking battery, it is designed to be maintained by the outboard’s regulated charging system while running, the same way a starting battery is. Do not charge from an unregulated alternator. After heavy electronics use, top it off with a LiFePO4 shore charger for a full charge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq8\"\u003e \u003clabel for=\"lbsfaq8\"\u003eCan I charge it with solar?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eYes. Use an MPPT solar charge controller set to a lithium (LiFePO4) profile at 14.2 to 14.6V. The controller regulates voltage and current so the battery receives a clean charge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq9\"\u003e \u003clabel for=\"lbsfaq9\"\u003eCan I wire batteries in series or parallel?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eYes. Up to 4 batteries can be connected in series to build a 24V, 36V, or 48V system, or up to 4 in parallel for more capacity. Match battery voltages before connecting and use appropriate fuses or breakers. In a series bank, charge with a multi-bank charger, or fully charge each battery individually about every 10 cycles to keep the pack balanced. In parallel, the built-in BMS balancing handles this for you.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq10\"\u003e \u003clabel for=\"lbsfaq10\"\u003eMy engine starts, then shuts off after a few seconds. What causes this?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eOn some motors, this can happen when the charging system outputs a high voltage. On this battery, the BMS restricts charging above about 14.8V but continues to allow discharge, so the battery keeps powering the load. Before installing any lithium cranking battery, confirm that your motor uses a regulated charging system and that its output voltage falls within the battery’s range. Your dealer or the motor manufacturer can confirm this.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq11\"\u003e \u003clabel for=\"lbsfaq11\"\u003eCan I charge it in cold weather?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe battery has built-in low-temperature charging protection, which prevents charging in freezing conditions to protect the cells. Its charge temperature range is 25°F to 131°F. It can still discharge and operate in colder conditions, with a discharge range of -4°F to 140°F. If it will not charge in the cold, warm it above freezing and try again.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq12\"\u003e \u003clabel for=\"lbsfaq12\"\u003eHow long will the battery last?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eLiFePO4 batteries are rated by charge cycles at a given depth of discharge (DoD), measured to 80% remaining capacity. This battery is rated for up to about 8000 cycles at 30% DoD, around 5000 at 50%, around 3800 at 80%, and around 2000 at full 100% DoD. In typical use that supports many years of service, which is why it carries a 10-year warranty.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq13\"\u003e \u003clabel for=\"lbsfaq13\"\u003eDoes it have Bluetooth, and what does the app show?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eYes. It connects to the MillerTech app, where you can view remaining capacity, voltage, real-time current, temperature, and cycle count. The app can monitor multiple MillerTech batteries at the same time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq14\"\u003e \u003clabel for=\"lbsfaq14\"\u003eWill it fit my Group 31 battery tray?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eYes. It is a BCI Group 31 size at 13” x 6.75” x 9”, so it fits standard Group 31 trays and hold-down setups. The case also has molded strap grooves to help keep hold-downs seated.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq15\"\u003e \u003clabel for=\"lbsfaq15\"\u003eHow much does it weigh compared to a lead-acid battery?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eIt weighs about 42 lbs, lighter than a comparable lead-acid Group 31 battery. Lower weight helps reduce overall boat or vehicle weight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq16\"\u003e \u003clabel for=\"lbsfaq16\"\u003eIs this battery safe and certified?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eIt uses lithium iron phosphate (LiFePO4) chemistry with an integrated BMS that protects against over-charge, over-discharge, over-current, and unsafe high and low temperatures. It is also UL 1973 certified (ANSI\/CAN\/UL 1973:2022 Ed.3), a third-party safety standard that tests the full battery system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq17\"\u003e \u003clabel for=\"lbsfaq17\"\u003eHow should I store it, and does it need maintenance?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eFor storage, charge the battery to at least 50% (about 13.3V), disconnect it, and recharge about every three months. Maintenance is minimal. If batteries are in a series bank and not charged by a multi-bank charger, fully charge each one individually about every 10 cycles to keep them balanced. In parallel, the BMS passive balancing handles this. There is no need to add water or equalize as with flooded lead-acid batteries.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq18\"\u003e \u003clabel for=\"lbsfaq18\"\u003eWhat warranty does it come with?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eIt comes with a 10-year warranty from MillerTech. Within the first 6 years, MillerTech repairs or replaces a defective battery and covers shipping both ways. From year 6 to 10, a repairable battery is repaired and returned at no cost, and an unrepairable one qualifies for a similar battery at 50% off retail. No registration is required; keep your receipt, or MillerTech can use the battery serial number.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-faq-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"lbsfaq19\"\u003e \u003clabel for=\"lbsfaq19\"\u003eHow is this different from a deep-cycle-only lithium battery?\u003c\/label\u003e\n\u003cdiv class=\"lbs-faq-answer\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eA deep-cycle-only battery is designed to run electronics but usually cannot deliver the high burst of current needed to start an engine. This dual purpose battery adds the cranking power to start outboards while still providing deep-cycle reserve for your electronics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Millertech","offers":[{"title":"Default Title","offer_id":48253925490946,"sku":"12190-DP","price":1299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/3660\/5442\/files\/Millertech_12V_190Ah_Dual_Purpose.png?v=1785881150","url":"https:\/\/www.lithiumbatterysupply.com\/products\/millertech-12v-190ah-dual-purpose-marine-battery","provider":"Lithium Battery Supply","version":"1.0","type":"link"}