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Lithium Pros M31-12S 12V Group 31 LiFePO4 Marine Starting Battery

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Pros was built by a team of engineers, chemists, and racing enthusiasts who shared a single obsession: replacing outdated lead-acid batteries with the most advanced lithium-ion technology available.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

M31-12S
08/24/2036 5:01 AM
Sale Price

$1,657.51

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Product Details

The Lithium Pros M31-12S is a 12.8-volt lithium iron phosphate (LiFePO4) marine starting battery built for anglers who demand maximum cranking power and all-day electronics endurance in a standard BCI Group 31 case. Powered by high-power LiFePO4 chemistry with cells tested to the UL1642 standard, this battery delivers 1,500 Marine Crank Amps (equivalent) and 110 amp hours of capacity with 260 minutes of reserve capacity.

Key Features:

  • LiFePO4 Chemistry — Holds higher voltage under load, preventing fish finder and graph resets during engine cranking
  • 1,500 MCA (Eq) — Enough cranking power to start most conventional outboard engines on the market
  • 110Ah / 260 Min Reserve Capacity — Run multiple 12" graphs and marine electronics simultaneously all day
  • IP67 Sealed Housing — Fully waterproof and sealed in a lightweight BCI Group 31 case (13" L x 6.81" W x 8.43" H)
  • Advanced Integrated BMS — Fully digital battery management system protects against over-current, under-current, short circuit, and over-temperature conditions
  • Up to 2,500+ Cycle Life — Over five times the cycle life of comparable lead-acid batteries at 80% depth of discharge
  • Weighs Only ~31 lbs — Approximately half the weight of a comparable Group 31 lead-acid battery
  • Fast Recharge — Recharges up to five times faster than traditional lead-acid batteries
  • Alternator Compatible — Safe for use with outboard charging systems from Mercury, Yamaha, Honda, and Suzuki

Charging is straightforward with any standard 3-stage 12V AGM-compatible battery charger. Set float voltage to 13.5V or less, do not exceed 14.8V, and do not use a desulfation mode. For 12V systems only — not for use in series to create higher voltage packs.

All Lithium Pros batteries carry a 7-year transferable warranty and a 60-day risk-free satisfaction guarantee, backed by real support from the manufacturer's team in Tennessee.

Prior to purchasing I made an inquiry and recieved no response.

Exactly as pictured and fast shipping

Great prices and exceptional delivery, think the order was delivered before I clicked submit ;)

Simple and quick

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Product arrived in 2 days and exactly as described. Thank you!

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