Lithium Pros M31-12S 12V Group 31 LiFePO4 Marine Starting Battery

The Lithium Pros M31-12S is a 12.8-volt lithium iron phosphate (LiFePO4) marine starting battery built for anglers who demand maximum cranking power and all-day electronics endurance in a standard BCI Group 31 case. Powered by high-power LiFePO4 chemistry with cells tested to the UL1642 standard, this battery delivers 1,500 Marine Crank Amps (equivalent) and 110 amp hours of capacity with 260 minutes of reserve capacity.

Key Features:

• LiFePO4 Chemistry — Holds higher voltage under load, preventing fish finder and graph resets during engine cranking
• 1,500 MCA (Eq) — Enough cranking power to start most conventional outboard engines on the market
• 110Ah / 260 Min Reserve Capacity — Run multiple 12" graphs and marine electronics simultaneously all day
• IP67 Sealed Housing — Fully waterproof and sealed in a lightweight BCI Group 31 case (13" L x 6.81" W x 8.43" H)
• Advanced Integrated BMS — Fully digital battery management system protects against over-current, under-current, short circuit, and over-temperature conditions
• Up to 2,500+ Cycle Life — Over five times the cycle life of comparable lead-acid batteries at 80% depth of discharge
• Weighs Only ~31 lbs — Approximately half the weight of a comparable Group 31 lead-acid battery
• Fast Recharge — Recharges up to five times faster than traditional lead-acid batteries
• Alternator Compatible — Safe for use with outboard charging systems from Mercury, Yamaha, Honda, and Suzuki

Charging is straightforward with any standard 3-stage 12V AGM-compatible battery charger. Set float voltage to 13.5V or less, do not exceed 14.8V, and do not use a desulfation mode. For 12V systems only — not for use in series to create higher voltage packs.

All Lithium Pros batteries carry a 7-year transferable warranty and a 60-day risk-free satisfaction guarantee, backed by real support from the manufacturer's team in Tennessee.