12v 392Ah Deep Cycle Lithium "POWER VAULT"
Mammoth 12V 392Ah Lithium Battery
Bigger Capacity. Longer Runtime. Absolute Power.
When maximum runtime matters and you refuse to compromise on power, the Monster Marine Lithium Mammoth 12V 392Ah delivers unmatched energy storage, reliability, and performance.
Built using premium Grade A LiFePO4 cells, an advanced high-performance BMS system, and Monster Marine Lithium’s rugged internal construction, the Mammoth 392Ah is engineered to outperform traditional batteries in the harshest marine and off-grid environments.
Designed for serious anglers, RV owners, solar systems, golf carts, and high-demand power applications, this battery provides enormous capacity while maintaining stable voltage output for sensitive electronics and heavy loads alike.
With over 4000+ charge cycles, the Mammoth 392Ah is built to last up to 10x longer than traditional SLA batteries, while offering lighter weight, faster charging, and significantly more usable power.
Why Choose the Mammoth 392Ah?
⚡ Massive 5,017Wh Power Capacity
Designed for extreme runtime and demanding power systems.
🔋 Premium Grade A LiFePO4 Cells
Only high-quality Lithium Iron Phosphate cells are used for maximum reliability and lifespan.
🧠 Advanced Battery Management System (BMS)
Protects against overcharge, overheating, over-discharge, and excessive current draw.
🛠 Rugged Internal Construction
Built to withstand harsh marine environments and severe vibration conditions.
📈 4000+ Charge Cycles
Delivers dramatically longer lifespan than standard lead-acid batteries.
⚓ Steady Voltage Output
Ideal for marine electronics, sonar systems, trolling motors, and high-demand applications.
🔗 Expandable System Design
Run batteries in series or parallel for larger voltage and capacity systems.
Ideal Applications
- Marine Electronics
- Forward Facing Sonar
- Bass Boats
- Trolling Motors
- RV Power Systems
- Solar Energy Storage
- Golf Carts
- Off-Grid Systems
- Electric Vehicles
Suitable For
✔ All 12V Electronics
✔ 12V Trolling Motors
✔ Minn Kota Trolling Motors
✔ Garmin Trolling Motors
✔ Lowrance Trolling Motors
✔ Rhodan Trolling Motors
✔ Ideal for ALL Trolling Motors
✔ Connect up to 4 batteries in series (24V / 36V / 48V systems)
✔ Unlimited parallel capability
✔ LiFePO4 replacement for SLA batteries
Compatible AGM Chargers
The following AGM-capable chargers are compatible with the Mammoth 12V 392Ah lithium battery:
- Minn Kota Precision Chargers
- Minn Kota Digital Chargers
- Dual Pro
- NOCO
- Real Pro
- Pro Sport
⚠️ Chargers must have AGM charging capabilities.
Specifications
| Specification | Details |
|---|---|
| Voltage | 12.8V |
| Capacity | 392Ah |
| Energy | 5,017Wh |
| Weight | 74 lbs |
| Dimensions | 13.5” L × 7.25” W × 9.75” H |
| Charge Voltage | 14.6V |
| Recommended Charge Amps | 150A Max |
| Continuous Output | 250A Max |
| Cell Type | LiFePO4 |
| Cycle Life | 4000+ Cycles |
| Terminal Type | F12 Screw-In Posts |
What Makes Monster Marine Lithium Different?
Monster Marine Lithium batteries are engineered for anglers and outdoorsmen who demand serious power, extreme reliability, and industry-leading runtime.
Every battery is built using:
- Premium Grade A cells
- High-performance BMS protection
- Rugged internal support structure
- Extreme vibration resistance
- Real-world marine testing
This is not a generic lithium battery — this is a professionally engineered high-capacity power system designed to outperform and outlast.