Product Description
VMAX LiFePO4 Battery with Bluetooth
The VMAX LFP1250B is a 12V 50Ah lithium deep cycle battery with Bluetooth that's designed for marine, off-grid solar, and energy-storage systems that require dependable power. Features a built-in Battery Management System (BMS) for protections that ensure long service life. Light 13 pound design makes it a perfect drop-in lithium upgrade over heavier AGM or flooded Group U1 batteries. Bluetooth battery monitoring, fast charging, and long cycle life make this a user friendly and versatile lithium upgrade.
Features & Benefits
- Bluetooth – Realtime monitoring of battery performance in the VMAX App.
- Built-In BMS Protection – Over/under-voltage, over-current, short-circuit and temperature protections.
- Compact U1 Group Size – Drop-in replacement for many VRLA/AGM U1 applications
- Fast, Efficient Charging – Optimized for LiFePO4 smart chargers and solar charge controllers.
- High Discharge Capability – Supports inverters and DC loads up to 50 continuous amps.
- Scalable System Design – Wire up to 4 in series (24/36/48V) or 4 in parallel (up to 200Ah).
- LED State-Of-Charge Display – Get at-a-glance SOC checks.
- 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. The standardized group sizes 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 battery devices 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.
VMAX Bluetooth Battery Monitoring
View real-time battery status, performance, and enable custom alerts to be notified when your specified conditions are exceeded.
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
VMAX App Downloads
| Type | Lithium (LiFePO4) |
| Voltage | 12.8 Volts |
| Capacity | 50Ah / 640Wh |
| Maximum Continuous Discharge |
50 Amps |
| Group Size | U1R |
| Length | 7.70" (196 mm) |
| Width | 5.20" (132 mm) |
| Height | 7.20" (183 mm) |
| Weight | 13.0 lbs (5.9 kg) |
| Terminals | M6 Inserts (hardware included) |
| Polarity | - Left / + Right |
| Charging Current |
5 - 30A |
| Charging Voltage |
14.4 - 14.6V |
| Low Voltage Cut-Off |
10.0V |
| Operating Temperature |
-4°F - 130°F (-20°C - 54°C) |
| Heater On (Powered By Charger) |
32°F (0°C) |
| Design Life | ~10 Years |
| Warranty | 7 Years |
VMAX LFP1250B Group U1 Cross-Reference
Replacement for Group U1 Batteries with M6 Insert Terminals: CP12350I, CT1050, DURA12-35C, ES35-12FT, ES35-12FT, GP12350I, LC-XD1235PI, LCR12V35PI, LFP1250B, MU-1 SLD M FT, ML35-12INT, NP35-12I, PE12V35I, PK12350I, PS-12350 B, PS12350I, SCP12350 M6, SLA12-35I, SLAA12-35C, UB12350I, UB12350 TH, V35-857.
Replacement for Group U1 Batteries with Nut & Bolt Terminals: 12N35-3B, 6FM33, 8AU1, 8GU1, CA12350, CP12350NB, DC35-12, DCM0035NB, DURDC12-35J, DURG12-31J-A, ES35-12NB, EXP35, GP12350-NB, LCR12V35P-NB, ML35-12NB, NB12-35, NP35-12NB, PDC-12350 NB3, PE12V35NB, PK12350-NB, PS-12350 NB, SCP12350 NB, SLADC12-35J, UB12350-NB, WB12350.
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.
