The Monster Marine Lithium 12V 344Ah Mammoth Battery is the ultimate deep-cycle solution for those who need long-lasting, reliable power. Built with Lithium Iron Phosphate (LiFePO4) technology and only Grade A cells, it features an advanced BMS system and rugged internal construction to withstand demanding conditions. With an impressive 4,000+ charge cycle rating, this battery lasts up to 10x longer than traditional SLA batteries. Perfect for marine applications, RVs, solar energy systems, and electric vehicles like golf carts, it delivers unmatched performance and reliability. Weighing just 61 lbs, it provides 344Ah of capacity and is compatible with AGM chargers, making it an ideal upgrade for high-demand power needs.

SPECIFICATIONS

WARRANTY

WEIGHT

61 lbs

SIZE

13.5″ (L) x 7.25” (W) x 9.75” (H)
Group 31 equivalent

STORAGE CAPACITY

344 ampere hours (Ah). Monster Marine Lithium batteries deliver reliable, consistent power throughout the full 344Ah capacity. Unlike traditional SLA batteries, Monster Marine Lithium LiFePO4 batteries feature a flat voltage curve, ensuring steady power output as they discharge. This advanced design provides uniform performance, giving you dependable energy all the way to the last drop.

Bluetooth Capable

Yes

VOLTAGE

12.8V 

ENERGY

4,403 Wh

TERMINALS

F12 BOLT

LIFECYCLES (BATTERY LIFESPAN)

Retains up to 80% capacity for 5,000 cycles under recommended conditions—far surpassing the 500 cycles of typical SLA batteries. Monster Marine Lithium batteries deliver exceptional longevity, reducing the cost per use to a fraction of traditional battery options.

OPERATING TEMPERATURE

Built for rugged and extreme conditions, Monster Marine Lithium batteries outperform SLA and other lithium options. With an optimal operating range from -20°F to +140°F and reliable performance down to -20°F, these batteries are designed to thrive in tough environments. Note: For best results, avoid charging below 32°F

DISCHARGE

344A max continuous discharge. The flat discharge voltage curve provides a 75% bigger capacity then a SLA 50Ah battery.

CHARGE

100a max, 14.4V recommended, 15V max Please note: this battery should be charged using a LiFePO4 compatible charger. A SLA charger may work, but will reduce performance and lifespan of the battery.

INCLUDES ACTIVE BMS PROTECTION

Equipped with an advanced circuit, this battery ensures cell balancing, low and high voltage cutoff, short circuit protection, and high-temperature protection. These features boost performance and significantly extend the battery's lifespan.

Unlock the Monster Marine Lithium Advantage

The Monster Marine Lithium 12V 344Ah Battery offers massive capacity, rugged durability, and long life, ideal for marine, RV, solar, and electric vehicle applications.

USD : 96.59