12V 120Ah Slim Bluetooth Lithium Deep Cycle Marine Battery MML-12120SB (w/ bluetooth)
⚡ 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):
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Minn Kota (Precision & Digital)
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Dual Pro
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NOCO
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Real Pro
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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 |
Frequently Asked Questions
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Yes, Festive Water Paddlesports is an authorized Monster Marine Lithium dealer. We carry a wide selection of Monster Marine Lithium products online and in store!
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All products at Festive Water Paddlesports are subject to their specific manufacturer's warranty policy.
Please refer to the Monster Marine Lithium website for more warranty information about the 12V 120Ah Slim Bluetooth Lithium Deep Cycle Marine Battery MML-12120SB (w/ bluetooth).
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Yes, Festive Water provides outfitting and rigging services!
If you have a whitewater kayak or touring, we can modify and update your outfitting.
For fishing kayaks, we can install motors, fish finders, lights, and other electronics.
Check out our Kayak Rigging page for more information.
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Yes, we offer full and partial refunds. However, some products like kayaks, SUPs, and other watercraft are excluded (sales are final).
Please read our Refund policy for more information.
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Festive Water Paddlesports offers financing through Affirm. Add your items to the cart, check out, and select Affirm as your payment method.
Check out our Financing page to learn more about Financing.
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At Festive Water, to thank you for your service, we've partnered with GovX to offer a 10% discount on our store.
You can learn more by checking out our Military and Public Service page. -
Yes, Festive Water Paddlesports ships kayaks across the lower 48 U.S. states with white glove, premium shipping!
Shipping rates are calculated at checkout.
Learn more by checking out our Shipping Policy page.
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We use USPS and UPS for small packages, and private courier partners for kayak shipping. Use the shipping estimator in the checkout to check your shipping rates.
For more information, please check out our Shipping Policy.
