Monster Marine Lithium 12V 20Ah Deep Cycle Lithium Battery

Compact Power. Extended Runtime. Built Like a Monster.

Looking for a lightweight, portable battery that delivers dependable power and extended runtime? Meet the Monster Marine Lithium 12V 20Ah Deep Cycle Battery.

Weighing just 4.9 pounds, this compact powerhouse delivers 256 watt-hours of energy in a portable, space-saving design. Whether you're powering fish finders, kayak electronics, ice fishing equipment, trail cameras, or other outdoor electronics, this battery provides dependable performance without the unnecessary weight of traditional lead-acid batteries.

Engineered using Lithium Iron Phosphate (LiFePO4) technology, an integrated Battery Management System (BMS), and Monster Marine Lithium's durable construction, this battery is designed to deliver consistent voltage, reliable power, and exceptional longevity.

With 4,000+ charge cycles, our 20Ah lithium battery is built to provide years of dependable service.

Perfect for anglers, hunters, and outdoor enthusiasts who need more runtime without sacrificing portability.

Why Choose Our 12V 20Ah?

⚡ Only 4.9 Pounds
Enjoy dependable 12V power without the unnecessary weight of traditional sealed lead-acid batteries.

📏 Compact, Portable Design
Measuring just 7 inches long, this battery is ideal for kayaks, portable power boxes, ice fishing setups, and tight battery compartments.

🔋 256Wh Energy Capacity
Provides twice the amp-hour capacity of our 12V 10Ah battery for extended runtime with compatible electronics.

🎣 Perfect for Kayak & Ice Fishing
Ideal for fish finders, portable sonar systems, and electronics that require dependable power throughout the day.

🦌 Excellent for Trail Cameras
A reliable rechargeable power source for compatible 12V trail cameras and hunting equipment.

🧠 Integrated Battery Management System (BMS)
Helps protect against overcharging, over-discharging, and excessive current.

🛠 Lithium Iron Phosphate Technology
LiFePO4 chemistry delivers excellent efficiency, stable voltage, and long-lasting performance.

📈 4,000+ Charge Cycles
Designed to provide significantly longer cycle life than traditional sealed lead-acid batteries.

🔗 Expandable Capacity – Parallel Connections
Connect compatible batteries in parallel to increase total amp-hour capacity while maintaining a 12V system.

Important: This battery supports parallel connections only. Series connections are not supported.

Ideal Applications

• Kayak Fish Finders

• Ice Fishing Electronics

• Portable Sonar Systems

• Garmin Fish Finders

• Lowrance Fish Finders

• Humminbird Fish Finders

• Forward-Facing Sonar Systems Within Battery Power Limits

• Trail Cameras

• Hunting Equipment

• Portable 12V Power Boxes

• Camping Electronics

• Outdoor Lighting

• Small 12V Electronics

• Replacement for Compatible 12V SLA Batteries

Battery Specifications

Specification	Details
Battery Chemistry	LiFePO4
Nominal Voltage	12.8V
Capacity	20Ah
Energy	256Wh
Weight	4.9 lbs (2.2 kg)
Dimensions	7" L × 3" W × 6.5" H
Charging Voltage	14.4–14.6V
Maximum Charging Current	Verify model rating
Maximum Continuous Discharge	30A
Terminals	M6 Bolts
Battery Type	Deep Cycle Lithium
Battery Management	Integrated BMS
Cycle Life	4,000+ Cycles
Parallel Connection	Yes
Series Connection	Not Supported

Recommended Chargers

For optimal charging performance, efficiency, and battery longevity, we recommend using Monster Marine Lithium battery chargers, specifically designed for our lithium battery systems.

Other Compatible Chargers Include:

• Minn Kota Precision Chargers

• Minn Kota Digital Chargers

• Dual Pro

• NOCO

• Real Pro

• Pro Sport

Important: Third-party chargers must have a compatible AGM or lithium charging profile that meets the battery's 14.4–14.6V charging requirements and stays within its maximum charging current. Verify compatibility before charging.

What Makes Monster Marine Lithium Different?

At Monster Marine Lithium, we understand that dependable power is essential whether you're on the water, in the woods, or enjoying the outdoors.

With nearly a decade of experience in the marine lithium battery industry, we've continuously improved our battery designs to deliver better performance, increased durability, and outstanding reliability.

Our batteries are designed with:

• Reliable LiFePO4 Technology

• Integrated BMS Protection

• Lightweight Construction

• Compact, Space-Saving Design

• Dependable Deep Cycle Performance

• Long-Lasting Rechargeable Power

• Quality Components

• Real-World Marine Experience

We take pride in providing exceptional customer service and standing behind the products we sell.

Whether you're fishing from a kayak, powering electronics on the ice, or keeping trail cameras running in the field, Monster Marine Lithium delivers dependable power in a compact package.

Monster Marine Lithium

More Capacity. Longer Runtime. Less Weight.

Built for the Water. Ready for Adventure.