Product Description
VMAX LFP3650MBH Self-Heated Lithium Bluetooth Battery
The VMAX LFP3650MBH is a 36V 50Ah LiFePO4 deep-cycle Bluetooth battery in a Group 31 footprint, engineered for trolling motors, commercial equipment, and energy-storage systems that demand 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 light 38 lb design makes it a perfect drop-in lithium upgrade over heavier AGM or flooded batteries. IP67 waterproof rating, fast charging, and long cycle life make this a user friendly and versatile power source.
LFP3650MBH Features:
- Self-Heating – Enables safe charging below 32°F (0°C) for year-round use
- 50Ah Capacity – Long run times for trolling motors, industrial equipment 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 VRLA/AGM applications
- Fast, Efficient Charging – Optimized for LiFePO4 smart chargers and solar charge controllers
- High Discharge Capability – Supports demanding inverters and 36V DC motors up to 100 continuous amps
- Scalable System Design – Wire up to 4 in parallel (up to 200Ah)
- 7 Year Warranty – Backed by VMAX's industry leading customer service
Why Choose the LFP3650MBH?
Part of the trusted VMAX LFP series, the LFP3650MBH pairs high-grade LiFePO4 cells with an advanced BMS to deliver stable, maintenance-free deep-cycle power. Its integrated self-heating system maintains charge acceptance in freezing conditions, making winter operation practical for RVs, boaters, and off-grid users. The Group 31 case 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, it scales easily from a single house battery to multi-battery energy storage. Backed by a 7-year pro-rated warranty for reliable power and long-term value.
Applications:
- Trolling Motors & Commercial Applications
- Off-Grid Solar & ESS: Solar Battery Banks, Hybrid Inverters, Backup Power Systems
- 36V DC Industrial Motors
- Deep-Cycle Only – Not intended for engine starting applications or golf carts
VMAX Bluetooth Battery Monitoring
View real-time battery status with the VMAXTANKS app – no external hardware or Wi-Fi needed; it's built-in. Enable custom low-battery alerts to stay informed.
Quickly and Easily Check:
- Voltage
- Amperage In/Out
- Estimated Time to Full Charge at Current Charge Rate
- Cell Balancing Monitor
- Temperature
- Battery Status
- Battery Cycles
LFP3650MBH 36 Volt Group 31 Cross Reference:
36V Group 31 lithium batteries: AB-36V60-BT, DL36-60, IC-36V50-EP, PGL36VM60, PID36V60AH, PP-36V-65AH, PSL-BT-36400-G31, RB36V40, SLIL36VDCM-BT, 850042818497.
Important: Always confirm your battery's dimensions, terminal configuration, and specifications before purchase to ensure proper fit.
| Voltage | 38.4V |
| Capacity | 50Ah / 1920Wh |
| Type | Lithium (LiFePO4) |
| Max. Discharge | 100A |
| Group Size | 31 |
| Length | 13.07" |
| Width | 6.89" |
| Height | 8.74" |
| Terminals | M8 Inserts (HW included) |
| Polarity | + Left / - Right |
| Weight | 37.5 lbs |
| Charging Current |
5A - 50A |
| Charging Voltage |
43.8V |
| Low Voltage Cut-Off |
24.0V |
| Operating Temperature |
-4°F - +150°F |
| Heater On (Powered By Charger) |
32°F |
| Warranty | 7 Years |
VMAXTANKS App Downloads:
