Lithium Pros N31-24 25.6V 75Ah NMEA 2000 LiFePO4 Marine Trolling Battery

The Lithium Pros N31-24 (also known as the N3175-24) is a 25.6V 75Ah Lithium Iron Phosphate (LiFePO4) marine trolling battery engineered for serious freshwater and saltwater anglers running 24V trolling motors. Delivering 1,920 watt-hours of energy in a BCI Group 31 form factor, this single battery replaces two conventional Group 31 marine batteries while weighing a fraction of the equivalent lead-acid setup.

A standout feature of the N31-24 is its built-in NMEA 2000 connectivity, making it part of the world's first series of lithium-ion batteries to achieve NMEA 2000 certification. The embedded BM-21 battery monitor broadcasts individual battery voltage, current, state of charge, time remaining, and temperature directly onto the vessel's NMEA 2000 network — keeping critical power data visible at the helm in real time. The BM-21 also logs warnings, alerts, and cumulative lifetime amp-hours with a real-time date stamp.

Key Features:

• 25.6V / 75Ah LiFePO4 Chemistry — Stable, safe Lithium Iron Phosphate cells for long service life and thermal stability
• 1,920 Watt-Hours — High energy density for all-day trolling capability
• 145+ Reserve Minutes — Enough runtime for extended on-the-water sessions from daylight to dark
• NMEA 2000 Certified — Broadcasts battery status data across compatible chartplotters and displays
• BM-21 Battery Monitor — Real-time voltage, amperage, state of charge, time remaining, and temperature reporting
• BCI Group 31 Form Factor — Fits standard Group 31 marine battery trays (13″L x 6.81″W x 8.43″H)
• Lightweight Design — At approximately 27.5–32 lbs, dramatically lighter than comparable lead-acid batteries
• 96% Charge Efficiency — Accepts charge current up to five times faster than lead-acid
• 2,000+ Full Cycle Life — Long-term value with recommended 80% depth of discharge
• Compatible with DC On-Board Charging — Pairs with Lithium Pros DC chargers (sold separately) for recharging via outboard engine charging system

The N31-24 is built for tournament-level performance in both freshwater and saltwater environments. Its Group 31 footprint makes installation straightforward in most existing battery compartments and trays. A 25.6V LiFePO4-compatible battery charger is required — do not use standard lead-acid chargers or de-sulfation modes with this battery.