Lithium Pros L31-36 36V 67Ah LiFePO4 Group 31 Trolling Battery with Bluetooth

Product label may vary. Lithium Pros is transitioning to new labels and part numbers; the item you receive may carry either the previous or the updated label.

The Lithium Pros L31-36 is a 36V / 67Ah Lithium Iron Phosphate (LiFePO4) deep cycle trolling battery built in a standard BCI Group 31 form factor. Designed for 36V trolling motor systems, this single battery replaces three conventional Group 31 lead-acid or AGM batteries, dramatically reducing onboard weight while delivering all-day power on the water.

Key Features:

• 36V / 67Ah capacity — approximately 2,570 watt-hours of usable energy
• 160 reserve minutes — extended trolling runtime from daylight to dark
• BCI Group 31 footprint — fits standard marine battery trays (13″ L x 6.81″ W x 8.43″ H)
• Only ~39.8 lbs — replaces three Group 31 batteries that together weigh over 200 lbs
• Built-in Bluetooth connectivity — pairs with the free LP Battery View app to monitor State of Charge, time remaining, voltage, amperage, and cell temperatures
• Internal Battery Management System (BMS) — auto-balances cells and protects against over-voltage, under-voltage, over-temperature, over-current, and short circuit conditions
• 96% charge efficiency — vs. approximately 75% for lead-acid batteries
• LiFePO4 chemistry — inherently stable and safe lithium iron phosphate cells tested to UL1642 standard
• IP67 water resistant — sealed for marine environments
• 3,000+ cycle life — long-term value vs. lead-acid alternatives
• Compatible with on-board DC chargers and third-party systems such as the Power-Pole CHARGE™

Important: Requires a 38.4V LiFePO4-compatible battery charger (sold separately). Not compatible with standard 36V lead-acid chargers.

The L31-36 is the ideal upgrade for freshwater and saltwater tournament anglers running 36V trolling motors who demand maximum runtime, minimal weight, and real-time battery monitoring in a direct-fit Group 31 package.