My Account
Shopping Cart

Lithium Pros M31150-S 12V 150Ah 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Pros was built by a team of engineers, chemists, and racing enthusiasts who shared a single obsession: replacing outdated lead-acid batteries with the most advanced lithium-ion technology available.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

M31150-S
08/22/2036 11:34 AM
Sale Price

$1,899.00

3 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Lithium Pros M31150-S is a 12.8V 150Ah Lithium Iron Phosphate (LiFePO4) engine start battery designed specifically for freshwater and saltwater tournament anglers using outboard motors. This battery meets the September 19, 2022 Mercury specifications for lithium-ion engine start batteries and is compatible with all outboards and alternators.

Key Features:

  • 1,500 Marine Crank Amps (Eq) and 360 minutes of reserve capacity
  • Replaces two Group 31 AGM batteries while weighing only 36 pounds
  • Group 31 case size: 13" L x 6.81" W x 8.43" H
  • Advanced internal battery management system (BMS)
  • Lithium Iron Phosphate chemistry holds higher voltage during discharge, preventing graph resets during engine cranking
  • Compatible with existing 12V AGM battery chargers

This is the battery of choice for boats with multiple 12-inch graphs, with professional anglers running up to five graphs simultaneously. LiFePO4 technology provides over five times the cycle life at 80% depth of discharge compared to standard lead-acid batteries, easily handling 2,500+ cycles. Lithium Pros batteries are 96% efficient at converting input energy into stored energy versus approximately 75% for lead-acid batteries.

Assembled in East Tennessee and compatible with all outboard charging systems. The charger's float voltage must be 13.5V or less and never exceed 14.8V. Not for use in series configurations—12V systems only.

Fast easy service just what I look for

Excellent price and very easy to order products.

thank you

wonderful product

Overall good experience. However, the delivery company delivered to the wrong address. Yes the package labeling reflected the correct address. Luckily, the person they delivered the package actually delivered it to my address.

Boatplicity.com offers a user-friendly site with a wide selection of boat parts at competitive prices. Shipping was prompt. Overall, a positive experience and I recommend it for boat needs

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy