Product Description
Heated Group 31 Lithium Battery with Bluetooth
The VMAX LFP12120MBH is a 12V 120Ah lithium deep cycle battery with Bluetooth that's engineered for marine, RV, off-grid solar, and energy-storage systems that require high capacity and dependable power. Designed with an internal self-heating system for safe cold weather charging, plus a built-in Battery Management System (BMS) for protection and long service life. Integrated Bluetooth battery monitoring and a light 28 pound design makes it a perfect drop-in lithium upgrade over heavier AGM or flooded Group 31 batteries. IP67 waterproof rating, fast charging, and long cycle life make this a user friendly and versatile lithium upgrade.
Features & Benefits
- Bluetooth – Realtime monitoring of battery performance via the VMAX App.
- Self-Heating – Enables safe charging below 32°F (0°C) for year-round use.
- 120Ah Capacity – Long run times for trolling motors, RV house loads and off-grid systems.
- Built-In BMS Protection – Over/under-voltage, over-current, short-circuit and temperature protections.
- Light Weight – Easier handling and drop-in replacement for many Group 31 applications.
- Fast, Efficient Charging – Optimized for LiFePO4 smart chargers and solar charge controllers.
- High Discharge Capability – Supports inverters and DC loads up to 150 continuous amps.
- Scalable System Design – Wire up to 4 in series (24/36/48V) or 4 in parallel (up to 480Ah).
- 7 Year Warranty – Backed by VMAX's industry leading customer service.
Why Choose VMAX Lithium Batteries?
The VMAX LFP series pairs high-grade LiFePO4 cells with an advanced Battery Management System (BMS) to deliver stable, maintenance-free deep-cycle power—year after year. Their integrated self-heating system maintains a charge acceptable internal temperature in freezing conditions, making winter operation practical for RVs, boaters, and off-grid users. The standardized group sizes and M8 terminals simplify drop-in lithium upgrades where AGM or flooded batteries were previously used. With fast charging, high discharge capability and support for series & parallel banks, they scale easily from a single house battery to multi-battery energy storage banks. Backed by a 7-Year Warranty and a 10-year design life for reliable power and excellent long-term value.
LFP12120MBH
LFP12120MBH Specifications
12.8V 120Ah LiFePO4 Deep-Cycle Battery
- Nominal Voltage 12.8V
- Capacity 120Ah / 1536Wh
- Group Size 31
- Chemistry Lithium (LiFePO4)
| Electrical & Performance | |
|---|---|
| Chemistry | Lithium (LiFePO4) |
| Nominal Voltage | 12.8 Volts |
| Rated Capacity | 120Ah / 1536Wh |
| Max Continuous Discharge |
150 Amps |
| Max 3-Second Discharge |
300 Amps |
| Low Voltage Cut-Off | 8.0V |
| Series Connections | Up to 4 (48V) |
| Parallel Connections | Up to 4 (480Ah) |
| Operating Temperature |
-4°F - 150°F (-20°C - 66°C) |
| Charging | |
| Charging Voltage | 14.4V - 14.6V |
|
Recommended Charging Current |
10A - 30A |
| Heater On (Powered By Charger) |
32°F (0°C) |
| Dimensions & Fitment | |
| Group Size | 31 |
| Length | 13.00" (33.0 cm) |
| Width | 6.89" (17.5 cm) |
| Height | 8.74" (22.2 cm) |
| Terminals | M8 Inserts (hardware included) |
| Polarity | + Left / - Right |
| Weight | 28.7 lbs (13.0 kg) |
| Certifications & Warranty | |
| Certifications | IP67, UN 38.3, CE |
| Cycle Life | ~4000 cycles @ 100% DOD, 50A, 77°F |
| Design Life | ~10 Years |
| Warranty | 7 Years |
Charging Note: Use a LiFePO4 compatible smart charger that meets the specifications listed.
VMAX LFP12120MBH DatasheetVMAX Bluetooth Battery Monitoring
View DetailsHide DetailsView real-time battery status, performance, and enable custom alerts to be notified when your specified conditions are exceeded.
- Voltage
- Amperage In/Out
- Estimated Time to Full Charge at Current Charge Rate
- Cell Balancing Monitor
- Temperature
- Battery Status
- Battery Cycles
VMAX App Downloads
Bulk Pricing on VMAX LFP12120MBH Batteries + Free Shipping
View DetailsHide Details2-3 — $15.00 Off Each
4-7 — $25.00 Off Each
8+ — $35.00 Off Each
Discounts automatically applied in shopping cart.
VMAX LFP12120MBH Battery Cross-Reference
View DetailsHide DetailsGroup 31 Batteries Lead-Acid Batteries: 31M, 31M-AGM, 31MDP, 31‑PC2150S, 7T31, 7T31P, 8A31DTM, 8G31, 8G31DTM, CT2500, D31M, DC31DT, DP31CS, DP31DT, DURHR12-430C/FR-A, HEPPC2150T-M, NSB‑AGM31, NSB-AGM31M, ODX‑AGM31, ODX-AGM31M, MB137-120, MR137-120, PC2150M, SLI31AGMDP, SLI31AGMDPM, SLI31CS, SLI31DP, SLI31DTMAGMDC, SLI31MDC, SLI31MDP, SLI31PHP/SHP, SLR125, SRM-31, XCA31-1400, XTR12-155, XTR31-135.
Group 31 12V Lithium Batteries: IC-12V100-EP4S, IC-12V125-EP4S, IC-12V150-EP, IC-12V150-EPH, 883-0125-12, BB10012, BB10012H, BB10012i, BB10012iH, LFP12120MBH, PP12-150, RB100, RB100-HP, RB100-LT, SLIL31-125DCM, SLIL31-150DCM-BT.
Important: Always confirm your battery's dimensions, terminal configuration, and specifications before purchase to ensure proper fit and performance.
Warning: LiFePO4 charger required if upgrading from non-lithium batteries.