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  1. MORE POWER- Lithium Pros' batteries hold a higher voltage while loaded and recharge faster.
  2. LIGHTER WEIGHT - Some models are so light they float, making them ideal for racing and marine use.
  3. FASTER RECHARGING - Lithium Pros’ lithium-ion batteries accept charge current up to five times faster than lead-acid batteries.
  4. LONGER BATTERY LIFE - Lithium Pros’ LiFePO4 batteries provide over five times the cycle life compared to standard lead-acid batteries
  5. MORE EFFICIENT - Lithium Pros’ batteries are 96% efficient at converting input energy into stored energy versus approximately 75% for lead acid.
M31150-S 12V 150Ah Marine Starting Battery - Lithium Pros

Lithium Pros M31150-S 150Ah Marine Starting 12 Volt Battery

Sale price $1,999.00

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Why Choose Lithium Pros?

  • Consumer Direct Support
  • Fully-Trained Dealerbase
  • Industry Leading Warranty
  • More Efficient Than Lead Acid
  • Trusted By Anglers Everywhere

M31150-S 12.8V 150Ah Lithium Ion Engine start Battery

  • This battery meets the Sept 19, 2022 Mercury specifications for a lithium-ion engine start battery.
  • Compatible with all outboards and alternators
  • Replace two group 31 AGM batteries with this ONE battery!
  • 12.8V
  • 150Ah (1,920 Whr)
  • 360 Reserve Minutes 
  • BCI Group 31 size, (13″L x 6.81″ W x 8.43″ T)
  • 36.0 lbs

This is the 12.8V 150Ah Lithium Ion Engine Start Battery we recommend for freshwater and saltwater tournament anglers for use with all outboards.  At 36 lbs, it is hard to believe that ONE battery can do what two group 31 marine batteries* can.

The M31150-S is a Lithium Ion Battery for the angler who will accept no compromises in a starting battery.  This is the most capacity that we can fit in a standard Group 31 case. (13″ L x 6.81″ W x 8.43″ T)

It features one of the most advanced internal battery management systems in the marine industry today.  This fully integrated digital battery management system insures long life and trouble free service all safely sealed inside a lightweight box.  This battery features 1,500 Marine Crank Amps (Eq) and will have no trouble starting all conventional outboard engines on the market today.  It can safely be used with any outboard charging system that is AGM and Gel battery compatible including Mercury, Yamaha, Honda, and Suzuki.  This battery meets the Sept 19, 2022 Mercury specifications for a lithium-ion engine start battery.

The M31150-S Marine Starting Battery has a whopping 360 minutes of reserve capacity, the highest on the market in a Group 31 case.  This is the battery of choice for boats with multiple 12″ graphs with pro anglers using this battery with up to five graphs running simultaneously.

Having trouble with graphs resetting during an engine crank?  The high power Lithium Iron Phosphate (LiFePO4) chemistry used in this battery holds a higher voltage as it is discharged eliminating this “reset” issue.  Avoid going to two 12V lead acid batteries when moving to 12″+ for graphs and forward facing sonar by choosing Lithium Pros!

Charging is simple because your existing 12V AGM battery compatible charger will work fine.*

In spite of all the power contained in this battery, it still ultra lightweight at an amazing 36 pounds! That's 1/4 of the weight of two Group 31 AGM batteries.

NOTE:  Not for use in series to make higher voltage packs.  12V systems ONLY.

Orders placed today are estimated to ship on April 5th, 2023.

*Group 31 marine battery assumed to be 220RC and 76 lbs.

*Insure the charger’s float voltage is 13.5V or less and the charger never exceeds 14.8V.  Do not “de-sulfate” any lithium ion battery.

12 Year Warranty

All Lithium Pros products carry a 60 day risk free guarantee. If you are not satisfied with your purchase for any reason, you can return it to where it was purchased (with proof of purchase) for an exchange or full refund*. We have full confidence in our products, and are sure you will too!

Click here to review out warranty policy.

Why Lithium Pros?

MORE POWER

Power is the measure of the volume at which energy can be delivered.  Lithium Pros’ batteries have always been high power. 

Lithium Pros' batteries hold a higher voltage while loaded and recharge faster. That means a hotter ignition, faster starts, and more watts for your accessories.

LIGHTER WEIGHT

Lithium Pros' batteries are three times the energy density of comparable lead acid batteries. High energy means you can do more in the same footprint and do it with less weight.

The result is a lighter battery. In fact, some models are so light they float, making them ideal for racing and marine use.

FASTER RECHARGING

Lithium Pros’ lithium-ion batteries accept charge current up to five times faster than lead-acid batteries, and in many cases Lithium Pros’ batteries recharge in as little as an hour.

LONGER BATTERY LIFE

Lithium Pros’ LiFePO4 batteries provide over five times the cycle life at 80% DoD (depth of discharge) compared to standard lead-acid batteries, and easily handles 2,500 cycles and more.