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 gel 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 for safer operation
- 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.
Bluetooth Battery Monitoring App
The VMAXTANKS App allows you to keep an eye on all your batteries' stats with no need for extra hardware or Wi-Fi, it's all built-in. The App also gives you the option to set desired notifications for low battery warnings.
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
App Downloads:
LFP1250B Battery Cross-Reference
Group U1 replacement for AGM models with M6 Insert 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 |