Product Description
VMAX LFP1250B Lithium Bluetooth Battery
The VMAX LFP1250B is a 12V LiFePO4 battery in a compact U1 group size with 50 Ah of deep-cycle capacity. Integrated Bluetooth battery monitoring and light 13 lb design makes it a perfect drop-in lithium upgrade over heavier AGM or flooded batteries. A durable, maintenance-free lithium power source for mobility scooters, small trolling motors, fish finders, and UPS applications.
LFP1250B Features:
- Built-in Bluetooth – Monitor voltage, current, cycles, temperature and status in real time via the VMAXTANKS app
- Deep-Cycle LiFePO4 Chemistry – Long service life, stable performance and zero maintenance
- BMS Protection – Over/under-voltage, over-current, short-circuit and temperature protections
- Light Weight Design – Easier handling and higher power-to-weight ratio versus lead-acid
- 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
- Series/Parallel Ready – Configure up to 24/36/48V (series) or up to 200Ah (parallel) systems
- LED State-Of-Charge Display – Get at-a-glance SOC checks
- M6 Insert Terminals – Versatile connections for a variety of applications
- 5 Year Warranty – Backed by VMAX's industry leading customer service
Why Choose the LFP1250B?
Part of the trusted VMAX LFP Series, the LFP1250B combines top-grade lithium cells with an advanced Battery Management System for safe and dependable deep-cycle performance. Bluetooth connectivity and the on-case LED SOC Display make system monitoring straightforward on the water, on the road or off-grid. The U1 footprint and M6 inserts simplify drop-in replacements and lithium battery upgrades for countless applications.
Applications:
- Marine & Fishing: Trolling Motors (up to 30lb thrust), Fish Finders, Chartplotters
- Mobility: Power Wheelchairs and Mobility Scooters
- Portable Electronics: Ham Radios, Portable Inverters, Communications Gear
- NOT for engine starting applications or golf carts.
- If charging below 32°F is required, a Battery Heater will be needed.
VMAX Bluetooth Battery Monitoring
View real-time battery status with the VMAXTANKS app – no external hardware or Wi-Fi needed; it's built-in. Turn on 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
LFP1250B Battery Cross-Reference
Group U1 replacement for models with M6 terminals: DURA12-35C, ML35-12INT, PS-12350 B, SCP12350 M6, SLAA12-35C, UB12350 TH, V35-857.
Important: Always confirm your battery's dimensions, terminal configuration, and specifications before purchase to ensure proper fit.
Warning: LiFePO4 charger required if upgrading from non-lithium batteries.
| Voltage | 12.8V |
| Capacity | 50Ah / 640Wh |
| Type | Lithium (LiFePO4) |
| Max. Discharge | 50A |
| Group Size | U1 |
| Length | 7.7" |
| Width | 5.2" |
| Height | 7.2" |
| Terminals | M6 Inserts (HW included) |
| Polarity | - Left / + Right |
| Weight | 13 lbs |
| Charging Current |
5A - 30A |
| Charging Voltage |
14.4 - 14.6V |
| Low Voltage Cut-Off |
10.0V |
| Operating Temperature |
-4°F - 130°F |
| Charging Temperature |
32°F - 113°F |
| Design Life | ~10 Years |
| Warranty | 5 Years |
VMAXTANKS App Downloads:
