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Lithium Pros N31-12S 12V LiFePO4 Group 31 Marine Starting Battery with NMEA 2000

Manufacturer

Lithium Pros

<h3>About Lithium Pros</h3><p>Founded in 2011 and headquartered in Knoxville, Tennessee, Lithium Pros was built by a team of engineers, chemists, and racing enthusiasts who shared a single obsession: replacing outdated lead-acid batteries with the most advanced lithium-ion technology available. Rather than adapting existing battery designs, the company set out to engineer purpose-built solutions for the demanding worlds of motorsports, marine fishing, recreational vehicles, EV conversions, and fleet applications.</p><p>What separates Lithium Pros from commodity lithium suppliers is the depth of real-world experience behind every product. <strong>Their first lithium-ion batteries were 16V packs developed specifically for Pro Nitrous, Pro Mod, and Pro Stock drag racing applications</strong> — environments where weight, power delivery, and reliability are non-negotiable. That racing DNA carries through the entire product line today, with batteries that hold a higher voltage under load, recharge up to five times faster than lead-acid equivalents, and deliver up to three times the energy density in the same footprint.</p><p>The marine lineup is equally impressive. The flagship <strong>M Series</strong> and <strong>N Series</strong> LiFePO4 batteries are engineered specifically for tournament anglers and serious boaters, offering exclusive cold-weather functionality and — in the N Series — built-in NMEA 2000 connectivity that feeds accurate state-of-charge data directly to compatible multifunction displays. Some models are light enough to float, a testament to the extreme weight savings lithium chemistry can provide over traditional AGM or flooded lead-acid packs.</p><p>Lithium Pros also understands that a great battery is only as good as the charger keeping it healthy. Their lineup of <a href="/18968-lithium-pros-battery-chargers-201677">battery chargers</a> is purpose-engineered to match the specific voltage profiles and charge characteristics of their LiFePO4 cells, spanning 12V, 24V, 36V, and 48V configurations for both marine and racing applications. High-frequency designs deliver smooth, consistent output voltage that extends battery life over thousands of cycles, and universal AC input compatibility means they work equally well in the garage, at the dock, or in the pits.</p><p>Backed by a 60-day risk-free guarantee on every product and assembled and tested in Tennessee, Lithium Pros stands behind its technology with the confidence of a brand that has powered some of the fastest vehicles — and most productive fishing boats — in the country.</p>

Part Number

N31-12S
08/24/2036 3:12 AM
Sale Price

$1,864.82

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Product Details

The Lithium Pros N31-12S is a 12.8V lithium iron phosphate (LiFePO4) Group 31 marine starting battery built for boaters who demand reliable engine starts and full network integration. Part of the Lithium Pros N Series, this battery pairs advanced LiFePO4 chemistry with a built-in NMEA 2000 port, putting real-time battery data directly on your multifunction display.

NMEA 2000 Network Integration:

  • Integrated waterproof M12 NMEA 2000 port connects directly to the backbone — no gateways or adapter cables required
  • Broadcasts voltage, state of charge, current, time remaining, and temperature to all compatible MFDs
  • Plug-and-play compatible with all NMEA 2000 multifunction displays
  • Reports standard battery PGNs: 127506, 127508, and 127513, plus alert PGN 126983
  • Up to 50 N Series packs can share the same NMEA 2000 network address space

Advanced Battery Management System:

  • Fully integrated digital BMS provides full protection against over-voltage, under-voltage, over-current, short circuit, and temperature extremes
  • Built-in heaters for reliable cold-weather charging, managed through the Lithium Pros app
  • Records warnings and alert events with real-time/date stamps
  • Cumulative lifetime amp-hours tracking
  • Compatible with all outboards and alternators

Key Specifications:

  • Voltage: 12.8V (LiFePO4)
  • BCI Group Size: 31 (13"L x 6.81"W x 8.43"H)
  • Chemistry: Lithium Iron Phosphate (LiFePO4)
  • Enclosure: IP67-rated — resists salt spray and momentary submersion
  • Compliance: ABYC E-13 compliant for seamless wiring integration
  • Cells: EV-grade, IEC 62133 tested
  • Assembled and tested in Tennessee, USA

Why Upgrade to Lithium Pros N Series?

  • Significantly lighter than equivalent Group 31 AGM batteries
  • Recharges up to 5x faster than lead-acid batteries
  • Over 5x the cycle life of standard lead-acid batteries
  • 96% charge efficiency versus approximately 75% for lead acid
  • Ideal for saltwater center consoles, offshore boats, bass boats with NMEA 2000 backbones, and vessels with complex house loads

The N31-12S is a direct drop-in upgrade for any 12V BCI Group 31 AGM or lead-acid starting battery, delivering superior cranking power, intelligent battery monitoring, and dramatically reduced weight — all in the same proven Group 31 footprint.

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