Monster Marine Lithium | SKU: MML-12120B

12V 120Ah Slim Bluetooth Lithium Deep Cycle Marine Battery MML-12120SB (w/ bluetooth)

$849.00

Payment

Credit Cards: We accept major credit cards, including Visa, Mastercard, American Express, and Discover.
Apple Pay & Google Pay: Simplify your checkout process using these digital wallets.
Shop Pay: For faster checkouts and secure payment processing.

Shipping

Ground, 2nd Day Air and Next Day Air available ! Same Day Shipping if your order is placed by 4pm Eastern

Returns

At Harbor Supply, we aim to ensure you’re completely satisfied with your purchase. If you need to return an item, you have 90 days from the date of delivery to initiate a return.

Eligibility for Returns:

To be eligible for a return:

The item must be in its original condition—unused, unworn, with all tags still attached, and in its original packaging.
You’ll need the receipt or proof of purchase.

Please note, returns must be authorized before sending any items back. Items returned without prior authorization will not be accepted.

Description

⚡ Monster Marine Lithium™ “Barracuda”

12V • 120Ah Deep Cycle Marine Lithium Battery

Model: MML-12120SB

Overview

Meet The Barracuda — compact, efficient, and built to deliver reliable long-lasting power for your 12V electronics and trolling motor systems.

Weighing in at only 32 lbs, this lithium battery replaces bulky lead-acid batteries while cutting overall weight by more than half. Housed in a Group 24 case, The Barracuda provides high-capacity power in a smaller footprint — perfect for anglers who want maximum performance without sacrificing space.

Built with Lithium Iron Phosphate (LiFePO₄) technology, this battery offers twice the power, a fraction of the weight, and four times the lifespan of standard sealed lead-acid batteries.

Installation is simple: — true plug-and-play performance.
Need more power? Wire up to four batteries in series for 24V, 36V, or 48V systems.

Key Features

⚙️ Lightweight & Compact Design
At just 32 lbs, The Barracuda is easy to install, transport, and maintain — without compromising output.

🔋 High-Capacity Power
Delivers 120Ah of energy with consistent voltage for smooth operation of trolling motors and marine electronics.

🧠 LiFePO₄ Technology
Advanced chemistry provides steady voltage, improved safety, and an extended lifespan of 4000+ cycles.

📱 Bluetooth Smart Monitoring
Monitor charge status, voltage, and health in real time using the MMLithium Bluetooth App.

🔌 Simple Installation
Plug-and-play setup — easily connect in series or parallel for larger system configurations.

⚡ Charger Compatibility
Compatible with most AGM marine chargers (AGM setting required):

Minn Kota (Precision & Digital)
Dual Pro
NOCO
Real Pro
ProSport

⚙️ Specifications

Category	Details
Weight	32 lbs
Case Size	Group 24
Dimensions (L × W × H)	10.25 in × 6.5 in × 8.2 in
Nominal Voltage	12.8 V
Nominal Capacity	120 Ah
Energy	1536 Wh
Charge Voltage	14.4-14.6 V max
Max Charge Current	100 A
Continuous Discharge Current	120 A max
Battery Chemistry	Lithium Iron Phosphate (LiFePO₄)
Cycle Life	4000+ cycles
Terminal Type	M8 Brass Bolt
Configuration Options	Up to 4 batteries in series for 48V max
Communication	Built-in Bluetooth monitoring

⚓ Applications

Use Case	Compatibility
Primary Use	Deep cycle power for 12V electronics and trolling motors
Voltage Systems	Compatible with 12V, 24V, 36V, and 48V configurations
Suitable Motors	Minn Kota, Garmin, Lowrance, Rhodan, and other trolling motors
Additional Uses	Fish finders, graphs, pumps, and auxiliary marine systems
Replacement For	12V sealed lead-acid (SLA) and AGM batteries
Weight Advantage	Over 60% lighter than traditional batteries