MarCum® Lithium 12V 10AH LiFePO4 Brute Battery and 3amp Charger Kit


Leave the weight behind this winter with the MarCum Brute 12V10AH Lithium LiFePO4 battery.  With half the weight and twice the run-time, MarCum’s Brute shaves pounds while improving performance.  In the past, increased run-time went hand-in-hand with heavier batteries.  With the Brute, you get featherweight technology that does not sacrifice performance.  Spend more time fishing, and less energy lifting.  The MarCum Brute sports a form-factor that provides a direct replacement for any system previously equipped with a 12V7/8/9 AH sealed lead-acid battery.  The other advantage that Lithium LiFePO4 offers is a significantly longer lifespan (2,000 full charge cycles), making it a more affordable alternative to lead-acid batteries over its lifetime.  The MarCum Brute is also equipped with a BMS circuit that protects the battery from overcharge, over dis-charge, and short circuiting.  The performance doesn’t stop there, as the MarCum Brute kit is equipped with a multi-stage charger for fast initial charge, reduced-charge near full, and a maintain charge cycle to prevent overcharging.  The MarCum Brute kit comes complete with battery, 3 AH charger, and fused charging cable.  As an angler, you rely on these power options to fuel your passion for the sport.  You can trust MarCum as all of our Lithium and LiFeP04 products are tested and certified to an international quality and safety standard.

  • Lithium LiFePO4 12V10amp battery and 3 AH charger
  • Half the weight, twice the run-time
  • 2 lbs. 11 oz.
  • Complete Lithium Re-Power Kit – Direct replacement to all electronics operated by 12volt 7/8/9 amp hour SLA Sealed Lead Acid batteries
  • Same battery footprint – fits existing electronics and shuttles
  • LiFePO4 is the optimal lithium chemistry for cold-weather performance
  • On-board BMS Circuit for battery management protection
  • Offers 2,000 full charge cycles
  • Multi-stage charge types include fast, reduced-charge, and maintain cycles
  • Safety Tested and Certified to UL 62133 standards

In stock

Frequently Purchased Together
1 × 12v Universal USB Plug

In stock

SKU: 857224002941.


PHYSICAL DIMENSIONS  5-7/8″ x 2-1/2″ x 3-5/8″
WEIGHT  2 lbs. 11oz.


BATTERY TYPE Lithium Iron Phosphate (LiFePo4)
VOLTAGE 12.8 Vd.c.
TERMINALS Standard F2 Spade Terminals (6.4mm or 0.25” wide)
LIFECYCLES 2000 Full charge cycles
CHARGING TEMPERATURE 0°C to +45°C (Do not charge a frozen battery)
BMS PROTECTION Circuitry designed to prevent the battery from operating outside its safe operating levels. Includes: over-current & over-voltage protection, regulates operation during high & low temperatures, balanced charging, and short circuit protection.


BATTERY Rechargeable 12-volt 10-amp Lithium LiFePo4 Battery
CHARGER 3-amp Hour Rapid-Charge Battery Charger
WIRING HARNESS Wiring Harness with 5-amp Fuse Protection
BATTERY WARRANTY Warranted against manufacturer defects for 2,000 charge cycles to 80% full capacity with product registration.
CHARGER WARRANTY One Year Charging System Warranty


BMS Protection

Circuitry designed to prevent the battery from operating outside its safe operating levels. Includes: over-current & over-voltage protection, regulates operation during high & low temperatures, balanced charging, and short circuit protection.


  • Do not immerse the battery in water or sea water. Keep the battery in a cool dry place when not in use.
  • Do not use or leave the battery near a heat source (i.e. heater, furnace, fire).
  • Use the battery charger only as directed when recharging.
  • Do not reverse the positive and negative terminals on the battery connections.
  • Do not discard the battery in a fire, furnace, or other combustible space.
  • Do not connect the battery directly to an electrical outlet.
  • Do not short –circuit the battery by directly connecting the positive and negative terminals with metal objects.
  • Do not directly solder the battery or pierce the battery with a nail or other sharp objects.
  • If the battery gives off an odor, generates heat, becomes discolored or in any way appears abnormal during use, or while charging or discharging, immediately stop using it.
  • If the battery leaks and the battery contents (electrolyte) gets into an eye, do not rub the eye. Instead, flush the eye(s) with clean water and immediately seek medical attention or it may result in injury to the eye(s).
  • Do not use the battery in a location where static electricity or magnetic fields are great or it may result in damage to the battery safety devices.
  • Do not leave the battery in high temperatures (i.e. in direct sunlight or in a vehicle in extremely hot weather) or it may overheat, and its performance will be degraded, and service life decreased.
  • Tape the battery terminals prior to disposal to insulate them as discarded batteries may cause fire or explosion.
  • Follow manufacturers instructions.
  • Do not charge a frozen battery.
  • Charging Temperature: 0°C to +45°C.


Lithium Repower Comparison Chart 2021
Comparison Chart of MarCum Lithium Batteries and Run-times for common ice fishing sonar systems.