Lithium Pros M32215-S 12V 215Ah LiFePO4 Marine Starting Battery

The Lithium Pros M32215-S is a Lithium Iron Phosphate (LiFePO4) battery designed for professional anglers who need one battery to start their engine and power multiple fish finders. This single battery replaces three Group 31 AGM batteries, delivering 510 minutes of reserve capacity and meeting the September 19, 2022 Mercury specifications for lithium-ion engine start batteries.

Key Features:

• 12.8V, 215Ah capacity (2,752 Whr)
• Compatible with all outboards and alternators
• Advanced internal battery management system (BMS)
• Weighs only 46.4 pounds—one-fifth the weight of three Group 31 AGM batteries
• Compact dimensions: 12.88" L x 7.13" W x 10.50" H
• Over 2,500 charge cycles at 80% depth of discharge

The high-power LiFePO4 chemistry holds a higher voltage during discharge, eliminating the fish finder "reset" issue common with lead-acid batteries during engine cranking. This is the battery of choice for boats with multiple 12" or 16" graphs and forward-facing sonar. Charging is simple because your existing 12V AGM-compatible charger will work fine, and the battery is 96% efficient at converting input energy into stored energy versus approximately 75% for lead-acid.

Important Notes:

• Not for use in series to make higher voltage packs—12V systems only
• Ensure charger float voltage is 13.5V or less and never exceeds 14.8V
• Do not use desulfate mode on this lithium-ion battery